Maintenance

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608 Plain Auto Table

Model 1018 Uni. on 90" cabinet

Flow Control Grinder

Your Crystal Lake Cylindrical Grinder should be maintained like a fine tuned instrument.   Keeping it in top condition requires a few simple steps to assure trouble free performance and years of service.

Index

Spindle-Bearings

Main Tables

In-Feed Slides

Gears and In-Feed

Belt Tension

CLG,s web Contents

Spindle-Bearings

Do not use detergent oils 

The Bearings on the Wheelhead and Workhead Spindles are of Double Taper Design and should be adjusted for end play at regular intervals especially during the first month of operation (as scraper marks flatten out the end play becomes noticeable).  Do not over adjust. To frequent adjustment of bearing end play will cause premature bearing failure.  

To adjust end play

             (1) Remove dust cap (on Wheelhead only)

             (2) Loosen set screws on spindle nut

             (3) Turn to Right until end play

 (using dial indicator) is less than .0002"

High Speed Steel Spindles run from .0002" to .00002".  All adjustments should be made       after bearings have been run and are warm.  Lubricant should be a light to medium hydraulic oil.  10, 20 S.A.E or DTE 24 Hydraulic oil.  Spindles run on the hydroplaning principle.  The spindle needs to float on a thin film of oil.  Therefore excessive belt tension or over tightening end play constantly will only cause premature ware.  Allow bearings after adjustment to find where it wants to run and leave it to hydroplane.  The thicker the oil the more gap will be required.    

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Main Tables

It is an accepted fact that in order to maintain tables absolutely straight at all times, they must be subject to an even temperature twenty-four hours a day, seven days a week.  The Table and Bed surfaces are scraped to create numerous recesses to hold Way oil for the best lubrication.  The second choice, a medium hydraulic like DTE 24.

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In-Feed Slides

The In-Feeds Slides are Dove Tail design.  They are scraped the same as the Table and Bed and have a Gib to take up wear of the slides.  On Plain Grinders, the Wheel Guard must be removed to locate Gib Screws.  On all models tighten Gib Screws evenly leaving just a slight drag on the In-Feed.  If Gib is adjusted too tight, Wheel jumping will occur.  

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Gears and In-Feed

Plain Cylindrical Grinders

Idler Gear for Plain Grinder Models 507, 608, 610, 751, 1020 and1220 can be set closer to take up wear in the In-Feed Gear Train . . . On 610,751, 1020, 1220 the back-lash of the In-Feed nut can be taken up by: 

        (1) removing side set screw in Base Casting

        (2) tightening cap screws  

        (3) loosening set screws on Lead Screw

      Universal cylindrical Grinders

 The In-Feed back lash can be taken up by:                                

    (1) Loosen In-Feed Hand Wheel set screws

              (2) Adjust bearings nuts in eccentric 

(1-Lock nut, 1-adjusting nut)

 

              (3) Tighten set screws again on Hand Wheel

 

Worm and bearings are set by the eccentric housing.  The worm can be adjusted in relation to the worm-gear by:

(1) Loosen In-Feed Hand Wheel set screws 

 (2) loosening rear set screw above eccentric housing

(3) rotating eccentric housing  to set gap between    worm and worm-gear

(4) Tighten set screws again

         If Platen is removed for any reason, care must be taken when re-engaging the rack as the rack can easily get caught on top of pinion teeth and cause breakage of pinion and/or rack.

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Belt Tension

Proper tension is essential on the Wheelhead Endless Belt for prevention  of Spindle binding and Belt slippage.

Excess Belt tension forces the Spindle into the Bronze Bearing thereby eliminating the oil film space between the Spindle and Bearing surface for the Spindle to glide on.

Of Course, Belt slippage is caused by a lack of tension.

Steps to take for proper tension:

1)    Align Swivel Table.

2)    Level Table with a level.

3)    Set Wheel 1/2" from Tailstock Dust Cap.

4)    Drop Countershaft by backing off the Upright Adjusting Rings until the Belt is loose.

5)    Level the Countershaft by placing a level on the steel or aluminum Workhead Belt Driving Drum and adjusting the Rings until the Belt Driving Drum is level.

6)    Once the Belt Driving Drum is level, start adjusting each Ring evenly 1/2 turn at a time.

7)    When Belt starts to snug up start the Wheelhead Motor.  If Belt slips then shut off Motor; tighten Belt by adjusting Rings evenly 1/2 turn at a time.

8)    You may have to start and stop Wheelhead Motor and make the 1/2 turn evenly with the Adjusting Rings several more times.

9)    When Belt grabs, Adjust each Ring 1/2 turn past that point.

10)  Belt should look as if it is loose and slapping.  You have a proper Belt tension as long as the Spindle turns without sticking and Belt is not slipping.

CAUTION

Too much tension on the Wheelhead Flat Endless Belt causes 

the Spindle to stick or bind and creates excessive wear on Bearings.  

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Last modified: July 15, 2001