Air/Oil Lubrication System Brochrue

Air/Oil System for Multiple Spindle Heads and High- Speed Box SpindlesNOZZLE TUBE ASSEMBLYTYPICAL BALL BEARING ARRANGEMENTGEAR SETSPRAY PATTERNSPRAY NOZZLE Air/Oil Lubrication SystemPage 2L20110Air/Oil Lubrication System NEW LUBRICATION METHOD FOR HIGH SPEED BEARINGS AND GEARSExclusive from Graco,® Spindl-Gard® is an extremely efficient and cost-effective method for lubricating single or multiple-spindle machining heads. This method also offers significant advantages for other types of equipment which use high-speed bearings and gears.Spindl-Gard Systems Get Back to the Important BasicsThe primary function of a lubrication system for machining spindles, gearboxes and enclosed antifriction bearings is to reduce friction and heat from friction. Circulating oil wet sump systems and mist systems do indeed reduce friction. However, they also create a battery of all-too-familiar problems.Today, Graco offers a proven new system—Spindl-Gard—that is far superior to traditional systems.Spindl-Gard provides a precise application of a measured amount of oil to a specific bearing surface. This oil is applied at the proper frequency in the right quantity to meet the lubrication requirements, keeping bearings, gears, shafts and seals running cool. Spindl-Gard provides full protection without over- or under-lubing. Fact is, a multiple-spindle head that used to require 1.5 gallons (5.7 liters) of oil per minute can now operate more efficiently with a mere 1.2 cubic inches (20 cm³) per hour applied by Spindl-Gard.Features/BenefitsHere’s how Spindl-Gard Systems improve performance and extend equipment life. Eliminate high oil consumption, leaking oil and contamination • of coolant that are common with circulating oil wet sump systems. Do away with the health, safety and cleanup problems that • result from mist systems. Save up to 17% on horsepower consumption to reduce energy • costs. Reduce temperature rise by up to 50% compared to wet sump • systems. Permit using higher spindle speeds within temperature • limitations to produce more good parts per hour. Provide effective monitoring capabilities for increased • protection of equipment against inadequate lubrication. Prevent corrosive coolant from entering and damaging head • components. Help extend seal life and reduce shaft wear.• Minimize thermal distortion to improve production accuracy.• All this and more, at an investment far less than the cost of a spindle rebuild.Spindl-Gard Delivers Cost-Effective Lubrication Plus, Much, Much MoreSignificant Savings In HorsepowerThis graph is based on comparison of Spindl-Gard with a circulating oil wet sump system. Each system was used on an 11-spindle head. The test covered more than 2,500 hours of operation. The bottom line is that the head protected by Spindl-Gard needed 17% less horsepower. This savings of up to 17% could result in either lower energy costs or more horsepower to apply toward increased production.Temperature Rise Reduced By Up To 50%Because Spindl-Gard works with a considerably smaller volume of oil, there’s less oil shear friction to generate heat. Also, Spindl-Gard’s pressurization of the head lowers compression loading of seals, to reduce seal-to-shaft friction and heat as well as wear on seal and shaft.Page 3 L20110Air/Oil Lubrication System Proven With Real-World TestsA major manufacturer of drill heads and a blue-chip automotive company were involved in the testing of Spindl-Gard for almost a year. The tests revealed that temperatures in the Spindl-Gard lubricated heads were an average of 22°F (12°C) below those for the wet sump units performing the same work.Opportunity To Increase Speeds and Use State-of-the-Art ToolingBecause Spindl-Gard reduces temperature rise and operating temperatures—as well as making more horsepower available for production—Spindl-Gard provides new latitude to increase speed and more fully utilize the capabilities of carbide or ceramic tooling. And Spindl-Gard does it without exceeding original temperature limitations.Increase Accuracy, Get More Good Parts Per HourSpindl-Gard System’s ability to keep heads running cooler means there will be less thermal distortion. More of equipment’s designed-in potential for accuracy can be realized.Less Chance for Coolant to Get Into HeadWith the Spindl-Gard System’s use of pressure in the head and outward-facing shaft seals, it’s unlikely that coolant will get into the head to cause rust or other problems. Any coolant that does infiltrate is quickly eliminated by the drain.Less Oil Needed, Less Oil UsedThe most effective circulating oil wet sump system requires large volumes of oil, applying about 1.5 gallons (5.7 liters) per minute per head. Spindl-Gard uses a very small volume of oil, a mere 1.2 cu. in. (20 cm3) per hour or about 1 gallon (3.8 liters) in 200 hours of operationSpindl-Gard Systems Designed for Your ApplicationsTwo different versions of Spindl-Gard are available to fit a wide range of applications. Each version is customized to provide optimum lubrication for the specific machine or equipment on which it is installed. Both types have been proven effective while avoiding the major problems common with circulating oil, mist, and grease pack lube systems.To distinguish the two different type of Spindl-Gard systems, Graco has designated them as: • Spindl-Gard System 1 (SG-1) Spindl-Gard System 2 (SG-2)• Range of Applications Spindl-Gard System 1 can be used with horizontal and vertical machining heads which have bearings operating at surface speeds to 2,500 surface feet (762 m) per minute, or 250,000 DN. (DN - diameter of bearing (D) in millimeters multiplied by the rotational speed of the bearing RPM (N).) SG-1 may be used by itself as an independent system for a specific spindle head. However, SG-1 can also be an integral part of a Graco Trabon® oil lubricating system. It is this latter option which offers the greatest cost advantages.Spindl-Gard System 2 differs from SG-1 in that it is designed for speeds above 2,500 surface fpm (762 mpm) (greater than 250,000 DN). The lubricant delivery method is also somewhat different, as will be explained later.Both systems can be used to good advantage for applications other than spindle heads. Other applications include motor, turbine, and blower bearings; high-speed gear-reduction drives, conveyor chain lubrication, or anywhere stray mist must be avoided.SYSTEM CONFIGURATIONS SPINDL-GARD SYSTEM 1 = TRUE MODULARITYSG-1 utilizes a standard Trabon® pump package (typically, Graco’s Modu-Flo® series), a Model MSP lubricant divider valve with cycle indicator switch, air pressure switch, Maxi-Monitor® controller, and various fluid line accessories. (See Figure 1.) In some cases, the machine controller will be used in lieu of the Maxi-Monitor controller. Each shot of lubricant from the pump is distributed by the divider valve to the appropriate lube point. Depending upon spindle head design, some bearings may receive lubricant directly from the divider valve while others, including gears, may receive lubricant from spray nozzles located in the gear cavity. By using the feedback features of the divider valve and air pressure switch, it is possible to monitor lubricant delivery status to all points at all times. The SG-1 circuit shown in Figure 1 can handle up to four spray nozzles and/or terminating lube points. However, when combined with the appropriate Trabon series-progressive lube system, the number of points which can be handled by SG-1 is virtually unlimited.Page 4L20110Air/Oil Lubrication System 215347 6889 910LINES TO TERMINATING LUBE POINTSMACHINING SPINDLE1 PSI PRESSURE SWITCHINLET AIR. 15 PSI (1 bar) 40 °F (4.4 °C) Dewpoint 5 MICRON ABSOLUTE20 S20 S5 TNOTE:AIR FLOW SWITCH (NOT SHOWN) CAN HANDLE UP TO TWO SPRAY NOZZLES.INLET AIR 40-100 PSI (2.8 - 6.9 bar)OPTIONAL LINE FROM MASTER DIVIDER VALVE (PUMP (1) AND FILTER (5) NOT REQUIRED)1. MPP PUMP PACKAGE (INCLUDES ITEM 2)2. AIR SOLENOID VALVE3. CONTROLLER4. CYCLE SWITCH OR PROXIM-ITY SWITCH5. 10 MICRON FILTER6. FINAL OIL FILTER7. SERIES PROGRESSIVE DIVIDER VALVE8. SOFT SEAT CHECK VALVE9. SPRAY NOZZLE10. 2 PSI (0.14 bar) RELIEF VALVE11. 1 PSI PRESSURE SWITCHFigure 1. Spindl-Gard System 11. MPP PUMP PACKAGE 2. AIR SOLENOID VALVE3. CONTROLLER4. CYCLE SWITCH OR PROXIM-ITY SWITCH5. 10 MICRON FILTER6. FINAL OIL FILTER7. SERIES PROGRESSIVE DIVIDER VALVE8. CHECK VALVE9. MIXING TEE10. NOZZLEFigure 2. Spindl-Gard System 2MACHINING SPINDLE10 109887436512INLET AIR 40-100 PSI (2.8 - 6.9 bar)OPTIONAL LINE FROM MASTER DIVIDER VALVE (PUMP (1) AND FILTER (5) NOT REQUIRED)20 S5 S5 TRESERVOIRNOTE:AIR FLOW SWITCH CAN HANDLE UP TO THREE NOZZLES (OR FOUR ORIFICES)AIR/OIL DELIVERY LINES 3/16 INCHES (5 mm) O.D. x 1/8 INCH (3 mm) I.D. MINIMUM LENGTH 24 INCHES (9.4 cm)AIR FLOW SWITCH OPTION 30 PSI(2.1 bar)60 PSI (4.1 bar) INLET AIR 40 °F (4.4 °C)Dewpoint 1 MICRON ABSOLUTEDRAINSDRAIN30 PSI(2.1 bar) INLET AIR 40 °F (4.4 °C) Dewpoint 1 MICRON ABSOLUTE WHEN AIR FLOW SWITCH IS NOT USED11Page 5 L20110Air/Oil Lubrication System SPINDL-GARD SYSTEM 2 UNIQUE DELIVERY METHODSG-2 differs from its predecessor primarily in lube delivery method and in the components used to mix the oil and air and deliver it to the bearings. Instead of lubricating with discrete shots of air-conveyed oil spray, SG-2 applies a continuous stream of air which carries a minute quantity of oil through tubing direct to the lube point (typically a high-speed bearing). The tubing is sized to allow the air flow to distribute the oil into minute, evenly spaced droplets which are carried along the tubing wall. The result is a minute supply of oil being continuously applied to the bearing surface. Again, this system provides both air and oil line monitoring with fault warning capability.SG-2 will give a warning if either a high or low air flow condition exists which would correspond to over or under lubrication. A similar warning system is built into the oil distribution assembly. This type of warning is essential for bearings which are turning at speeds in excess of 250,000 DN. A typical SG-2 system is illustrated in Figure 2.Both SG-1 and SG-2 are modular in design. Components are available off-the-shelf from any Graco authorized Trabon distributor.SYSTEM SELECTION CRITERIAThe first step in selecting any Spindl-Gard System is to calculate the “DN” factor. This factor is developed from the following equation using these parameters:D: Spindle bearing bore diameter in millimeters (MM)• N: Spindle speed in revolutions per minute (rpm)• DN: MM x rpm• When DN is 0—250,000, Select Spindl-Gard System 1 (SG-1)• When DN exceeds 250,000, Select SG-2• Contact Graco to arrange a Spindl-Gard design seminar or to • discuss details of your application.SPINDL-GARD SYSTEM 1 COMPONENTSController: Several means of control are available for the SG-1. Operation can be controlled by signals from user’s machine control or by one of several controllers available from Graco as follows: WMP III Maxi-Monitor• ® : This microprocessor-based controller can be used to schedule and initiate cycles on a machine cycle or time basis as well as to relay fault conditions. For details, see Literature No. L14750. • Solid-State Timer: This solid-state controller can be used to initiate pump cycles on a time basis. A built-in memory retains the cycle time for 1-1/2 hours during power failure or machine shutdown to resume from the point where it was suspended. For details, see Literature No. L14511. • Flexi-Monitor: Utilizing the latest solid-state programmable control technology, the Flexi-Monitor controls complex multiple zone lubrication systems. Not only does the Flexi-Monitor control lubrication cycles, but it can monitor and report every aspect of the lubrication system; including temperature, vibration, fluid flow, pressure, and system operating status. For details, see Literature No. L14200.Modu-Flo® Pump: For details on this compact, dependable, air- or hydraulic-powered pump and its accessories, see Literature No. L12000.Filter: A 10-micron filter placed in the outlet line of the pump provides filtration of oil entering the system. The moving portions of the divider valves require extremely fine tolerances. A final oil filter at the divider valve inlet provides the filtration necessary before oil enters the valve.Divider Valve: This valve meters the precise amount of oil required for each Spindl-Gard nozzle or terminating lube point. The divider valve consists of stackable sections, each of which can provide oil to one or two lube points. The sections can be arranged to provide metered oil up to sixteen lube points. A valve section can be supplied with a cycle indicator pin to provide visual indication that the divider valve is cycling. The indicator pin can also be used to actuate a cycle switch which then provides a signal to the system controller. For details on the MSP valve as well as its Cycle Indicator Pin, see Literature L10102.Spindl-Gard Spray Nozzle: The basic nozzle can be installed in heads with walls up to 1-3/4-inches (44.4 mm) thick. It has separate 1/8-inch NPT inlet ports for air and oil. Nozzle design and system air pressure (15 psi (1 bar) at nozzle inlet) combine to provide a 60 degree conical spray pattern that has a 9-inch (22.9 cm) diameter at a 6-inch (15.2 cm) distance from the nozzle.Cycle Switch: The cycle switch is a limit switch which is actuated by the movement of the indicator pin. If a blockage occurs in a lube line, the divider valve will not cycle and the cycle switch will not be actuated. If the switch is not actuated within a set time period, the controller provides a warning signal. The cycle switch is supplied with a moisture-resistant enclosure and 6 feet (1.83m) of cable.Proximity Switch: The proximity switch is a proximity-type sensor which senses the movement of the divider valve piston during cycling. The proximity switch provides a signal that is used to monitor the system in the same manner as the cycle switch. The proximity switch is supplied with a mini style Brad Harrison 3-pin or 5-pin connection that is connected to the controller with a moisture proof cable assembly.Page 6L20110Air/Oil Lubrication System SPINDL-GARD SYSTEM 2 COMPONENTSThe SG-2 uses the same Modu-Flo, pump package, filters, divider valve, cycle switch and check valves that are used in Spindl-Gard System 1. Air requirements are 30 psi (2.1 bar) when no air switch is used or 60 psi (4.1 bar) with air flow switch. In either case, supplied air must have a 40 °F (4.4 °C) dewpoint and be filtered to 1 micron absolute. Components unique to SG-2 are listed below.Spindl-Gard Air Flow Switch: This small, simple pneumatic device warns of any blockage or breaks in the air line supplying the Spindl-Gard System. Normally-open and normally-closed contacts on two limit switches can be connected to the controller to provide immediate fault feedback. Spindl-Gard air flow switch is preset at the factory, but may be adjusted if necessary.Mixing Tee: The mixing tee receives metered oil from the divider valve and air from the air flow switch at two separate inlet ports. One common outlet port provides the air/oil mix into a delivery line which connects to the nozzle tube. Up to nine mixing tees may be coupled for ease of mounting and plumbing if more than one point is to be lubricated.Spindl-Gard Nozzle: Several options are available for the nozzle. Two options consist of a tube and adapter assembly and the third a restrictor assembly. The restrictor assembly consists of a fitting with 9/16-18 UNF-2A threads which thread into the machining spindle wall. A 0.030 inch (0.76 mm) orifice pressed in the fitting provides an oil outlet at the restrictor end. The tube and adapter assemblies consist of a cut-to-length tube which is inserted into an adapter. The adapter has a 9/16-18UNF-2A thread which threads directly into the machining spindle wall. The tube is cut to a length to allow it to be held in the adapter with its end inserted in the bearing housing. One tube has a single outlet on the side while the second has two side outlets located 180 degrees from each other. Figure 3 shows examples of the nozzle applications. An easy to remove and replace adapter that is held in place with two 1/4-20 x 1/2” screws is also available and permits removal without alignment or depth.Low-Pressure Soft-Seat Check Valve: This valve, installed at the bearing point, prevents oil drainage of the oil lines and prevents air from entering the oil line. Oil drainage or air entrapment could result in improper oil application at the lube point.Relief Valve: Installed at the lowest point of the machining spindle, this valve serves three important purposes. It maintains a positive internal head pressure to prevent coolant and other contaminants from entering the head. It prevents build-up of excessive pressure which could interfere with proper oil dispersion. And, it keeps the sump dry by providing a simple means to drain off oil that would otherwise collect.DOUBLE-OUTLET SINGLE-OUTLET RESTRICTOR OUTLETFigure 3. Nozzle ApplicationSYSTEM SPECIFICATIONSSG-1 SystemSpray Nozzle Air Pressure15 psi (1 bar)Air Volume Per Nozzle 0.6 scfm (17 sclm)Relief Valve Pressure @ lowest point in gearbox, 2 psi (0.14 bar)SG-2 SystemMixing Tee Air Pressure30 psi (2.1 bar)Air Volume Per Nozzle 0.6 scfm (17 sclm)Air Drain Hole Size 1/8 in (3.2 mm), per bearingAir Flow SwitchInlet Pressure 60 psi (4.1 bar)Outlet Pressure 30 psi (2.1 bar)Air Filtration 5 micron absolute, 40ºF (4.4ºC) dewpointMSP Diver ValvesMax Pressure 3500 psi (24.13 MPa)Weight3-Section Assembly 5.9 lbs (2.7 kg)4-Section Assembly 7.3 lbs (3.3 kg)5-Section Assembly 8.7 lbs (4.0 kg)6-Section Assembly 10.2 lbs (4.6 kg)7-Section Assembly 11.6 lbs (5.6 kg)8-Section Assembly 13.0 lbs (5.9 kg)Max Operating TemperatureBuna-N O-Rings 200ºF (93ºC)Viton O-Rings 350ºF (163ºC)Typical Flow Rate @ 60 cycles/min, 38 in3/min (623 cm3/min)Page 7 L20110Air/Oil Lubrication System COMPONENT SPECIFICATIONSSG-1 Spray Nozzle Assemblies (Figure 6)Headwall: 1-3/4 in (44.4 mm) thickNozzle Threads 1-12 in UNFAir Inlet Threads 1/8-27 in NPSFLube Inlet Threads 1/8-27 in NPSFSG-2 End Outlet Nozzle (Figure 9)Nozzle Threads 1/8 in NPTAir-Oil Inlet 3/16 in tubeSG-2 Tube Adaptor (Figure 8)Adapter Thread 9/16-18 in UNF, 2AInlet 3/16 in tubeSG-2 Nozzle Adapter w/Mounting Bracket (Figure 12)Air-Oil Inlet 3/16 in tubeAir Flow Switch (Figure 17)Air Inlet Threads 1/8-27 in NPSFAir Outlet Threads 1/8-27 in NPSFLow-Pressure Setting High-Flow Fault, 23 psi (1.6 bar)High-Pressure Setting Low-Flow Fault, 37 psi (2.6 bar)Check Valve (Figure 13)Inlet Threads 1/8 in NPSFOutlet Threads 1/8 in NPTFCracking Pressure 35 psi (2.4 bar)Max Backpressure 100 psi (6.9 bar)Relief Valve (Figure 15)Relief Pressure Setting 2 psi (0.14 bar)Inlet Threads 3/8-18 in NPSFOutlet Threads 3/8-18 in NPTFAir-Oil Mixing Tee (Figure 14)Air/Lube Inlet Threads 1/8-27 in NPSFAir/Lube Outlet Threads 3/16 in (5 mm) tubePump Outlet Filet (Not Shown)Micron Rating 10 MicronInlet Threads 1/4 in NPTFOutlet Threads 1/4 in NPTMDivider Valve Inlet Filter (Figure 16)Micron Rating (Nominal) 90 MicronInlet Threads 1/4 in NPTFOutlet Threads 1/4 in NPTMProximity Switch (Figure 10)120/240 VAC 2 amp24 VDC 50 mACycle Switch (Figure 11)NEMA Compliances 1, 3, 3R, 4, 12, 13 and 6P120/240 VAC 5 amp28 VDC 3 ampORDERING INFORMATIONDescription Part No. Old Part No.SG-1 Spray Nozzle Assemblies – 484-094-030SG-2 End Outlet Nozzle 562994 435-702-275SG-2 Tube Adapter 563127 484-090-075SG-2 Nozzle Adapter w/Mounting Bracket– 484-090-193Air Flow Switch 564348 484-095-095Check Valve 563048 463-001-535Relief Valve 564337 463-300-156Air-Oil Mixing Tee 563129 484-095-050Pump Outlet Filter – 527-100-230Divider Valve Inlet Filter 563094 473-000-265Proximity Switch– 527-003-250– 527-004-110Cycle Switch 563273 510-599-2001 PSI Pressure Switch18 in Leads 558888 492-140-5974-Pin Brad Harrison – 492-140-615OTHER SYSTEM COMPONENTS AND APPLICATION LITERATUREFor information on other system components and application techniques, refer to the Graco literature listed in the following table. This literature is available from your local Graco Distributor.SPECIFICATIONSLit L10102 Divider ValveLit L12000 Modu-Flo PumpsLit L14750 Maxi-Monitor Controller (WMP III)Lit L14200 Flexi-MonitorLit L20201 Designing a Series-Flo Feeder SystemLit L20115 Calculating Lube RequirementsLit L30101 Locating Blockage in Series-Flo SystemsLit L30103 How to Remove Air From a Trabon SystemPage 8L20110Air/Oil Lubrication System SG-1 OPERATIONFigure 4 is to be used only as a guide to understand the general relationship of Spindl-Gard System components and how the Spindl-Gard System functions.The pump (1), and controller (3) are mounted on a stationary part of the machine. An external air supply is required to operate the pump (40 to 100 psi (2.8 - 6.9 bar)) and to provide a supply of clean, dry air (approx. 40 °F (4.4 °C) dewpoint, 5 micron absolute filtration, at 15 psi (1 bar)) to flow through the spray nozzle (9).The divider valve (7) with cycle switch or proximity switch (4) is located on the movable machining spindle. Flexible lines bring the oil to the divider valve inlet and the air to the inlet port of the spray nozzle (9).Oil destined for the spray nozzle is precisely metered in the top segment of the divider valve. Second and/or third segments in the valve which will cycle in sequence may be used to deliver oil directly to the terminating lube point, tool holder, etc. The cycling of the divider valve is monitored by the controller through an electrical signal generated by either the cycle switch or proximity switch. A pump failure, power failure, loss of lubricant, plugged or crushed feedline, or broken supply line would prevent cycle switch or proximity switch from producing the required signal to the controller, which would register a fault condition.The force of the air coming into the spray nozzle (9) assembly at 15 psi (1 bar) picks up and carries minute particles of oil through the nozzle apertures in a 60 degree conical spray pattern to lubricate the components inside the machining head.A relief valve (10) inserted at the lowest point of the machining spindle maintains positive air pressure at 2 psi (0.14 bar) to exclude coolant and other contaminants. It also provides a simple means to drain off any collected oil from the sump.Soft-Seat Check Valves (8) should be installed in any lines coming out of the divider valve that will be delivering oil directly to terminating lube points. These checks prevent oil drainage from, or air entrance into, the oil lines.The 1 psi pressure switch (11) may be installed anywhere on the gear cavity to monitor positive head pressure.215347 6889 910LINES TO TERMINATING LUBE POINTSMACHINING SPINDLE1 PSI PRESSURE SWITCHINLET AIR. 15 PSI (1 bar) 40 °F (4.4 °C) Dewpoint 5 MICRON ABSOLUTE20 S20 S5 TNOTE:AIR FLOW SWITCH (NOT SHOWN) CAN HANDLE UP TO TWO SPRAY NOZZLES.INLET AIR 40-100 PSI (2.8 - 6.9 bar)OPTIONAL LINE FROM MASTER DIVIDER VALVE (PUMP (1) AND FILTER (5) NOT REQUIRED)1. MPP PUMP PACKAGE (INCLUDES ITEM 2)2. AIR SOLENOID VALVE3. CONTROLLER4. CYCLE SWITCH OR PROXIM-ITY SWITCH5. 10 MICRON FILTER6. FINAL OIL FILTER7. SERIES PROGRESSIVE DIVIDER VALVE8. SOFT SEAT CHECK VALVE9. SPRAY NOZZLE10. 2 PSI (0.14 bar) RELIEF VALVE11. 1 PSI PRESSURE SWITCHFigure 4. SG-1 Operation11Page 9 L20110Air/Oil Lubrication System SG-2 OPERATIONFigure 5 is to be used only as a guide to understand the general relationship of SG-2 System components and how the system functions.The pump (1) and controller (3) are mounted on the stationary part of the machine. An external air supply is required to operate the pump (40 to 100 psi (2.8 - 6.9 bar)) and to provide a supply of clean, dry air (approx. 40 °F (4.4 °C) dewpoint, 1 micron absolute filtration at 60 psi (4.1 bar )) to the air flow switch. The air flow switch provides air at 30 psi (2.1 bar) to the mixing tee (9) where air will pick up oil for delivery through the mixing tees to the nozzle assembly (10).The divider valve (7), cycle switch (4), and mixing tee (9) are mounted on the moveable or stationary spindle head. Flexible lines bring the oil from the pump to the divider valve inlet, and air from the air flow switch to an inlet on the mixing tees (9).Oil entering the divider valve is precisely metered and ported to the mixing tees. Air from the air flow switch is also ported to the air-oil mixing tees. The air and oil combine in the mixing tee and are delivered through tubing to the nozzle assembly (10).When oil enters the tubing, it is deposited on the inner surface, forming a laminar sublayer of the turbulent air stream. The dynamic forces of the air moving through the center of the tube move the oil to the opening of the nozzle assembly. The oil is deposited in very small amounts directly, and continuously, on the rotating bearing surface.The SG-2 System is designed to operate in conjunction with the divider valve’s cycle indicator pin and cycle switch accessories. By using the cycle switch in conjunction with a controller, a fault warning signal can be generated when a lube line is blocked. The air flow switch adds fault warning when the air line or lines are blocked or broken. A sensing device in the switch notes any change in the air flow rate and provides a fault signal to the controller.When line monitoring is not desired, the air flow switch is not used and an air supply line (30 psi (2.1 bar)) comes directly into the mixing tee. Air and oil are mixed in the tee and delivered to the nozzle via a single line from the tee’s outlet port. When multiple tees are used to form a manifold, plugs are removed from all but the last tee and a single air input line is used. Each tee in the manifold, however, requires an oil line from a segment in the divider valve, and delivers oil to its specific nozzle-tube via a single line from its outlet port.1. MPP PUMP PACKAGE 2. AIR SOLENOID VALVE3. CONTROLLER4. CYCLE SWITCH OR PROXIM-ITY SWITCH5. 10 MICRON FILTER6. FINAL OIL FILTER7. SERIES PROGRESSIVE DIVIDER VALVE8. CHECK VALVE9. MIXING TEE10. NOZZLEFigure 5. SG-2 OperationMACHINING SPINDLE10 109887436512 INLET AIR 40-100 PSI (2.8 - 6.9 bar)OPTIONAL LINE FROM MASTER DIVIDER VALVE (PUMP (1) AND FILTER (5) NOT REQUIRED)20 S5 S5 TRESERVOIRNOTE:AIR FLOW SWITCH CAN HANDLE UP TO THREE NOZZLES (OR FOUR ORIFICES)AIR/OIL DELIVERY LINES 3/16 INCHES (5 mm) O.D. x 1/8 INCH (3 mm) I.D. MINIMUM LENGTH 24 INCHES (9.4 cm)AIR FLOW SWITCH OPTION 30 PSI(2.1 bar)60 PSI (4.1 bar) INLET AIR 40 °F (4.4 °C)Dewpoint 1 MICRON ABSOLUTEDRAINSDRAIN30 PSI(2.1 bar) INLET AIR 40 °F (4.4 °C) Dewpoint 1 MICRON ABSOLUTE WHEN AIR FLOW SWITCH IS NOT USEDPage 10L20110Air/Oil Lubrication System Figure 6. SG-1 Nozzle Assembly – (484-095-030)Figure 9. End Outlet Nozzle 562994 (435-702-275)1.312 (33.32)7/16 HEX (11.11)1/8 NPT3/16 TUBING SLEEVE 3/16 TUBING NUT1-1/8 HEX (28.75)1/8-27 NPSF LUBE INLET3.500 (88.9)2.281 (57.93)0.875 (22.22)1/8-27 NPSF1 INCH-12 UNF THREADAIR INLET (2 PLACES, 180° APART)UP TO 10.0 (254)0.149 (3.78)NOTE 1 OR 2 OUTLETSFigure 7. SG-2 Nozzle Tube 560477 (484-090-089) One Side Outlet 560478 (484-090-090) Two Side OutletFigure 10. Proximity Switch (Brad Harrison) – (527-003-250) 3-Pin Connector – (527-004-110) 5-Pin Connector7/8-16 UNC THREAD FOR CONNECTOR7/16-20 THREAD FOR DIRECT MOUNTING INTO MSP PISTON CLOSURE PORT0.875 HEX (22.22)4.000 (101.60)Figure 8. SG-2 Nozzle Tube Adapter 563127 (484-090-075)Figure 11. Cycle Switch 563273 (510-599-200)0.502 DIA. REF. (12.7)3.031 (77.0)2.000 (50.8)1.156 (29.4)0.969 (24.6)3/8 HEX (9.53)5/8 HEX (15.88)7/8 HEX (22.63)9/16-18 UNF-2ANOZZLE TUBE SUP-PLIED SEPARATELY 1.406 (35.71)TUBE CONNECTOR FOR 3/16 INCH O.D. TUBE NOTE: NOZZLE TUBE MUST BE CUT TO PROPER LENGTH AND FLARED FOR EACH SPECIFIC BEARING APPLICATION.Page 11 L20110Air/Oil Lubrication System Figure 12. Nozzle Adapter with Mounting Bracket – (484-080-193)Figure 15. Relief Valve (2 PSI (0.19 Bar)) 564337 (463-300-156)Figure 13. Soft-Seat Check Valve 563048 (463-001-535)Figure 16. Divider Valve Inlet Filter 563094 (473-000-265)Figure 14. SG-2 Air-Oil Mixing Tee 563129 (484-095-050)Figure 17. Spindl-Gard Air Flow Switch 564348 (484-095-095)1/8-27 NPSF1/8-27 NPSF2.00 (50.8)1/8-27 NPSF2.82 (71.63)0.257 (6.35) DIA THRU FOR TIE BOLT1.00 (25.4)NOTE: SPECIAL LUBE/AIR OUT-LET FITTING SUPPLIED1-2-14 NPSF CONDUIT CON-NECTION1/8-27 NPSF (TYP.)5.0 (127)GAUGE 1/8-27 NPSFAIR OUT PORT 1/8-27 NPSF3.25 (82.6)0.281 (7.14) MOUNTING HOLES (TYP.)2.375 (60.32)3.125 (79.4)2.531 (64.28)1.75 (44.45)1/4-18 NPTF0.687 (17.46)1/4-18 NPSF1/8 NPTF1/8 NPSF1.312 (33.34)0.562 (14.28)0.562 (14.29)1.875 (47.63)3/8-18 NPTF0.875 (22.23)3/8-18 NPSF.19 (4.8) OD x .03 (.8) WALL TUBING SUPPLIED BY CUSTOMER.25 (6.3).25 (6.3)1.40 (35.7)1.75 (44.4)9/16-18 UNF-2A .87 HEX (22.2)NOZZLE TUBE SUPPLIED SEPARATELY.87 HEX (9.5)1.00 (25.4).50 (12.7).25 (6.3).75 (19.0)1.50 (38.1)2.00 (50.8)NOZZLE ORIFICE ORIEN-TATION MARK1.00 (25.4)0.437 HEX (11.11)ACCESSORYFlare Tool: 45° SAE 0.149-inch (3.8 mm) OD Tubing Flare with special tube clamp for precise nozzle tube flaring.Always specify key Spindl-Gard components by the proper part number, shown below, when orderingFigure 18. Flare Tool – (483-000-090)All written and visual data contained in this document are based on the latest product information available at the time of publication. Graco reserves the right to make changes at any time without notice.Contact us todayTo receive product information or talk with a Graco representative, call 800-533-9655 or visit us online at www.graco.com.©2006-2009 Graco Inc. Form No. L20110 Rev. B 3/09 Printed in U.S.A. All other brand names or marks are used for identification purposes and are trademarks of their respective owners. All written and visual data contained in this document are based on the latest product information available at the time of publication. Graco reserves the right to make changes at any time without notice.SPINDL-GARD SYSTEM ORDERING INFORMATIONDescription Part No. Old Part No.SG-1 Spray Nozzle Assembly 563128 484-095-030SG-2 End Outlet Nozzle Assembly 562994 435-702-275SG-2 Nozzle Tubes (must be used w/adapter)One Side Outlet 560477 484-090-089Two Side Outlet (180º) 560478 484-090-090SG-2 Nozzle Tube Adapter 563127 484-090-075Adapter w/ Mtg. Bracket – 484-090-193Air-Oil Mixing Tee 563129 484-095-050Mixing Tee Tie RodsTwo Disc. 415-700-274Three – 415-700-275Four – 415-700-276Five – 415-700-277Six 557733 527-001-840Seven 557734 527-001-850Eight 557735 527-001-860Nine 557736 527-001-870Relief Valve, 2 psi (0.14 bar) 564337 463-300-156Soft-Seat Check ValveFemale-Threads Feeder-End & Male-Threads Bearing End– 563-001-535Filter AssembliesFilter (90 micron Nominal) – 472-000-265Filter (10 micron) – 527-100-230Proximity Switch (Brad Harrison)3-Pin – 527-003-2505-Pin – 527-004-110Cable for Proximity Switch3-Pin, 6 ft (1.8 m) 558021 570-999-0803-Pin, 12 ft (3.6 m) 558022 570-999-0905-Pin, 6 ft (1.8 m) 558023 570-999-1605-Pin, 12 ft (3.6 m) 558034 570-999-170Cycle Switch 563273 510-599-2001 psi Pressure Switch18 in Leads 558888 492-140-5974-Pin Brad Harrison – 492-140-615