Thank you for choosing Gros-Ite Spindle: Following are some simple steps you need to follow prior to operating your Gros-Ite Spindle.

Handling:

A precision spindle must be handled carefully. The spindle should not be bumped or dropped. Each spindle is securely packaged in a custom fitted shipping/storage case at the factory. It is recommended that this case be retained for storage of the spindle when it is not in use.

It is also recommended that the lubrication inlet ports and well as any drains or vents that were plugged or covered during shipment remain plugged or covered until the spindle is mounted to the machine or into a bracket. These features should remain covered or plugged until the Oil/Air lines are ready to be connected to the spindle.

Storage:

If the spindle is idle, or will not be used for more than 30 days, it should be stored in low humidity, and at normal room temperature (60-90 °F). To avoid contamination, all inlets must be plugged and all drains or vents must be covered to prevent the ingress of foreign particulate or liquids. Coat any unprotected metal surfaces with a metal protectant to prevent rust or corrosion. (See Start Up)

The spindle shaft should be rotated during storage several revolutions by hand every 30 days. This will keep the bearings lubricated, as oil tends to settle in the bottom of the raceways during periods of long-term storage. This action also prevents false brinelling of the bearing races due to the inherent low-level vibrations present in most buildings.

Mounting Instructions:

As with any precision assembly, the mounting surfaces are critical to the spindle performance. All mounting surfaces (spindle and machine) should be stoned and wiped clean. This will eliminate any small nicks or burrs that may have occurred on the mounting surfaces during shipping and handling.

Never deliver any shock loads or hammer a spindle. This will permanently damage the spindle bearings and result in reduced life. Use pullers and jack screws whenever possible. Mishandling the spindle will void the warranty.

For cartridge style spindles it is only necessary to tighten the clamping screws sufficiently enough to prevent the rotation of the spindle housing in the bracket. Over tightening of the clamping screws may destroy the built-in clearances to provide ideal performance of the spindle bearings. This can cause overloading and overheating of the bearings and result in chatter and vibration as well as shortening the life of the spindle.

If the spindle is belt driven: The proper tensioning of the drive belt is essential to the performance and life of the spindle. The belt should be tensioned enough to prevent slippage and vibration, but loose enough to prevent excessive radial load being transmitted to the rear bearings.

Motorized Spindles:

If your spindle is motorized and requires liquid cooling use PH balanced water based coolant with a rust inhibitor. A good coolant is a 50-50 mix of water and antifreeze. Water with high salt or mineral content should be avoided, as it tends to leave deposits in the internal porting, which can become plugged. The coolant flow rate recommended is 6 gallons per horsepower per hour at a temperature of 70-80 °F. If oil is used as the cooling media, the flow must be increased to 15 gallons per horsepower per hour. The coolant pressure at the spindle should not exceed 35 psi.

Oil/Air Lubrication System

This spindle has been designed to operate with Vogel Oil/Air Lubrication Systems

This spindle is manufactured with a lubrication inlet for each bearing position. It is absolutely essential that all of these inlets be connected to the lubricator.

This spindle can be operated with Air/Oil lubrication systems of other manufacturers. Please contact Gros-Ite Spindle before operating this spindle on other than the above recommended system.

It is highly recommended that the fault signal from the lubricator monitoring devices be interlocked with the Start/Stop circuit for the spindle drive motor, preventing the starting of the spindle drive motor unless lubrication is present.

The Oil Mist Lubrication System may be installed in any plane, equal to, or above or below the spindle being run. Tubing should be 4mm OD x .85mm wall flexible plastic tubing. The minimum length must be 40" with the maximum being 39 feet. In the event of long runs it is advisable to coil the tube in a helix of five turns as close to the spindle as possible. This coil should be either horizontal or 30 degrees up from the horizontal to allow the oil to collect in the bottom of the coils.

All fittings and connecting tubing are to be de-burred and flushed with clean, filtered solvent or oil and blown out with clean dry air prior to connecting to the lubricator and the spindle. This greatly reduces the chance of contamination entering the spindle.

DO NOT use Teflon tape on any of the connections between the lubricator and the spindle. Teflon tape may break or flake off and travel into the oil mist orifices in the spindle causing a blockage

It is highly recommended that the Oil/Air Lubrication be started either manually or automatically approximately 10 minutes prior to the start of the spindle. This allows sufficient wetting of the balls and raceways. Spent oil should be present at all of the vents and around the end caps. Additionally, it is highly recommended that the Oil/Air Lubrication be allowed to operate for a period of 10-15 minutes after the spindle is shut down. This serves to act as a purging action to prevent the ingress of contaminants as the spindle cools down.

The air supply to the Oil/Air Lubricator should be clean and dry. The use of a combination filter/dryer prior to the Oil/Air Lubrication Unit is highly recommended. A coalescent type dryer is preferred to the desiccant type dryer. Gros-Ite recommends the use of a P/N 79895116 filter/dryer with a .01-micron filtration rating available from MSC Industrial Supply.

The oil used in the Air/Oil Lubricator should be highly refined mineral-based oil with a viscosity of 135-165 SUS @ 100 ºF. A listing of approved spindle oils is included in this manual.

There are certain situations in which a different type of oil may be substituted. However, in no case should the oil exceed a viscosity rating of 150-165 SUS @ 100 ºF.

The use of oils with higher viscosities may cause an increase in stabilized operating temperature. The operating temperature of the spindle should be monitored and not allowed to exceed 120º F without approval from Gros-Ite Spindle.

Setting The Lubricator

The Vogel Oil/Air Lubricator has several adjustments that need to be made prior to operating the spindle. They are:

1. Air pressure at the regulator.
2. Air pressure at the spindle.
3. Lube Interval (Pause Time)
4. Time & Pressure
5. Monitoring Time

Included in this manual is a listing of the proper settings for your new Gros-Ite Spindle.

A temporary pressure gage should be installed in a tee at the spindle Oil/Air Lubrication inlets to ensure proper setting of the pressures at the spindle.

With the temporary gage in place and the Air/Oil lines connected to both the lubricator and the spindle, set the pressure adjustment to the specified pressure at each inlet port. It may be necessary to re-check pressures at each lube port after making any adjustments.

When the above adjustments are complete, allow the lubricator to run for 5-10 minutes and observe the vents and end-caps at the spindle. There should be air and oil present at these points.

Once the presence of air and oil has been verified begin running the spindle. The temperature of the spindle should be monitored closely for the first hour of operation as a safety precaution.

Oil/Air Lubrication Setup Data

Type of Lubricator: SEE DATA IN MANUAL SUPPLIED WITH SPINDLE

Type of Oil: SEE DATA IN MANUAL SUPPLIED WITH SPINDLE

Air Pressure at Regulator: SEE DATA IN MANUAL SUPPLIED WITH SPINDLE

Air Pressure at Air/Oil Inlet #1: SEE DATA IN MANUAL SUPPLIED WITH SPINDLE

Air Pressure at Air/Oil Inlet #2: SEE DATA IN MANUAL SUPPLIED WITH SPINDLE

Air Pressure at Air/Oil Inlet #3: SEE DATA IN MANUAL SUPPLIED WITH SPINDLE

Air Pressure at Air/Oil Inlet #4: SEE DATA IN MANUAL SUPPLIED WITH SPINDLE

Air Pressure at Air/Oil Inlet #5: SEE DATA IN MANUAL SUPPLIED WITH SPINDLE

Meter Size: SEE DATA IN MANUAL SUPPLIED WITH SPINDLE

Lube Interval Time (Pause Time): SEE DATA IN MANUAL SUPPLIED WITH SPINDLE

Time @ Pressure: SEE DATA IN MANUAL SUPPLIED WITH SPINDLE

Monitoring Time: SEE DATA IN MANUAL SUPPLIED WITH SPINDLE

Stabilized bearing operating temperatures, test run speeds, and test times are included on the Final Inspection Sheet contained with in this manual.

START UP:

Although your Gros-Ite Spindle has been thoroughly tested to the full operating speed at the factory, we suggest that when you receive it, or after it has been sitting idle or in storage for thirty (30) days or more, the spindle should be run up gradually prior to full time operation.

We also suggest the following:

1. First rotate the spindle by hand to insure that it spins unobstructed or without any noticeable noise.
2. Then begin running the spindle at 10% of the max operating speed for a period of 15 minutes.
3. If the temperature does not exceed 100 ºF or if you have no temperature sensor, hot to the touch. Increase the spindle speed an additional 25% and run for 15 minutes.
4. Continue this process increasing the speed each time by 20% until the full operating speed is reached. If at any time during the run up the spindle exceeds 120 ºF the spindle should shut down and be allowed to cool to ambient temperature before restarting at the previous speed. If after a run of 15-30 minutes the spindle does not stabilize or show signs of stabilization contact Gros-Ite Spindle for further information.
5. Once stabilized at the full operating speed the spindle should run no hotter than 120 ºF. After this initial start up is completed the spindle may be now run at the full operating speed immediately upon start-up. However, please note that if the spindle has been in storage for thirty (30) days or more, this process should be repeated.

If the machine the spindle is mounted to has an automatic speed ramp up, it is recommended to give the spindle a 15-30 second ramp up to full operating speed after the initial start up procedure has been completed.

TOOL INSTALLATION:

Avoid installing a cold tool in a warm spindle. This is of particular importance with the shallow tapers in an internal grinding spindle. By installing a cold quill in a warm spindle, the quill will be positioned too deep in the spindle shaft taper due to thermal expansion from the heat. When the spindle assembly is subsequently cooled down you will create a shrink fit of the quill in the taper, and most probably, the quill cannot be removed without machining and doing potential damage to the bearings.

If at anytime you should have any questions please give us a call @ 800-851-2654. Again, thanks for choosing Gros-Ite, we appreciate your business.