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Harold Hall

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If you need some guidance in making thin washers, then  they can be held using soft jaws in the three jaw chuck or secured to a purpose made faceplate using an adhesive, follow the links above for more information.

 

If suitable nuts are not available to go on the end of the pivot pin, make two to suit. All the parts requiring to be made can be seen in Photograph 17.

 

ASSEMBLE AND MEASURE SLOPE

Remove the jaw and main screw and then assemble the vice body onto the base using the pin. Use one washer on either side, between the vice and the base uprights. Fit two nuts one locked onto the other, adjusted so that the pin has no end float, but is free to rotate, see SK3. This ensures the assembly has not been over tightened onto the uprights and distorted the base.

 

The vice will now have a small slope, due to the hole for the pin having been lowered in the base uprights. Place the vice on a surface plate or the machine table, measure with a dial test indicator, as is shown in Photograph 18. Determine how much the sliding surface of the vice body adjacent to the jaw, is lower than at the leadscrew bracket end.

 

To correct this error, it will be necessary to machine the top of the two small pads on the base, as is shown in Photograph 19. As the distance from the pivot to these pads is greater than that between the two points measured, the amount to be removed will be greater than the measure value.

 

Set up the vice on the machine table, with the vice raised into the upright position to permit machining the pads. Calculate from the measured value the amount to be removed, and machine over the two pads removing the amount decided. Do be careful and remove less, rather than more. It is easier to return to take a little more off, than to have to build these faces up again.

 

Having made the first cut, lower the vice and measure as before whilst still on the machine. If it is still required to remove more, go through the process again, repeating until the vice is parallel to its base.

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17

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18

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19

Metalworking

Workshop Projects

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