TOOL ASSEMBLY
WARNING!
To reduce the risk of personal injury and damage to the tool, use ONLY accessories rated at or above the RPM listed on the tool's nameplate.
1.Examine a new unit carefully for signs of shipping damage (wheels, guards etc.). Make sure all parts are tight but do not overtighten wheel nut. See “Mounting Wheels”, Fig. 3.
2.Do not operate grinder unless it is securely bolted in place. Two mounting holes are provided in the base of the grinder.
3.Inspect wheel for flaws or cracks and replace a damaged wheel immediately. Use only wheels with a safe speed rating at least as high as the no load speed of the grinder and follow the instructions in Fig. 2.
4.It is possible for a wheel to have concealed flaws. To prevent injury or damage, stand clear of wheel on start up and allow to run for one minute. If vibration and/or noise are present, dress the wheel as instructed in Fig. 5. If the vibration or noise continues, investigate cause and correct before using.
Plexiglass Eye Shields (Fig. 1)
(Standard Equipment for Cat. Nos. 4935 and 4995)
Two separate eye shields (one for each wheel) are supplied and must be used when operating the grinder.
Fig. 1 |
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Notched | Rod | 12 Volt Automotive | |
Light Bulb | |||
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Area |
| Eye Shield | |
Wing |
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Nut |
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The MILWAUKEE 1H.P. Bench Grinder is dual voltage rated at 115/230 Volts. The grinder is factory wired for 115 Volts. The voltage may be changed to 230 Volts, by rewiring the motor connections.
The rewiring should be performed by a qualified electrician or Autho- rized MILWAUKEE Service Station Personnel.
The wiring diagrams and connections are inside the baseplate of the grinder. Unplug the grinder before removing the baseplate. When chang- ing to 230 volts, the cord set must be wired directly to the power source or wired with a proper 230 volt attachment cord set.
Grinding Wheels
When selecting abrasive wheels, only high quality aluminum oxide or silicon carbide wheels should be used. Aluminum oxide, although not as hard as silicon carbide, is tougher and more resistant to breakage.
Coarse wheels (36 grains of grit per inch) are recommended for rough grinding. Medium grit wheels (60 grit) are excellent for the jobs such as smoothing welds or preparing surfaces for finishing. Fine grit wheels (80 grit) are for sharpening or fine finishing.
Inspecting Grinding Wheels (Fig. 2)
Fig. 2
Test wheels before mounting by tapping it lightly with a nonmetallic tool such as the handle of a screwdriver. If it rings, it is in good condition. If it does not, discard the wheel. Wheel must be dry when applying this test or the sound will be deadened. Tap wheels about 45° on either side of the vertical center line and about 1 or 2 inches from the outside edge as indicated in Fig. 2. Rotate the wheel 45° and repeat the test.
NOTE: Organic bonded wheels do not emit the same clear metallic ring as verified and silicated wheels.
Mounting Wheels (Fig. 3)
Clamp
Wheel Guard
Illuminated Eye Shields (Fig. 1)
Eye Shield
Fig. 3 |
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Wrong | Wrong | Right |
No Wheel Blotter |
| Properly |
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Flange Not Recessed |
| Mounted |
Inner Flange Not |
| Wheel |
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Keyed To Spindle |
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(Standard Equipment for Cat. Nos. 4931, 4991, 5051 and 5091)
Illuminated eye shields are furnished with a 12 volt automotive bulb to light both sides and the face of the grinding wheel. The light socket and bulb are held in place, under each eye shield, by a bolt and a nut that passes through a slot in the rear edge of the eye shield, to clamp the socket assembly in place. Two separate eye shields (one for each wheel) are supplied and must be used when operating the grinder.
Installing Eye Shields
The clamping assemblies for the eye shields are factory installed.
1.To install the eye shields, loosen the wing nut.
2.Insert the rod portion of the shield assembly between the wheel guard and the notched area of the clamp.
3.Adjust the eye shield assembly to the proper height. Tighten the wing nut.
1H.P. Grinder (Cat. No. 5091)
It is recommended that a No. 14 wire, fused with a 15 amp time lag fuse, be used to supply power to all 1H.P. grinders, regardless of their electric rating. This hook up should be independent of other electrical equipment.
End Nut
Too Tight
1.Unplug tool.
2.To mount the grinding wheels, remove the wheel guard covers from the guards. Remove the hex nuts - the threads on the spindle are such that the nut tightens as the wheel rotates when the tool is in operation.
3.Check to be sure that blotters are undamaged and in place.
4.Slide the grinding wheels on to the spindle so that the blotter rests firmly against the inner wheel flange.
5.Replace the outer wheel flange and nut. Make sure the cupped portion of the outer flange is resting on the wheel (See Fig. 3).
6.Tighten the end nuts only enough to hold the wheel firmly. Too much pressure may damage the wheel or related parts.
7.After the wheel has been mounted, stand aside and run the wheel for at least one minute before grinding. NOTE: Never stand in direct line of the wheel.
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