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Warco VM12

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Peter Russell 429/06/2022 16:46:18
68 forum posts
1 photos

Has any one had to replace the nylon speed change gear in a Warco VM12 milling machine.

Ive managed to strip the teeth off mine and need guidance as to how to get it appart. the big hurdle Ive got is the spindle assembly is held in by a large circip but the holes that the circlip pliers go into have been cut on half and its so far got the better of me

Pete

Howard Lewis29/06/2022 17:18:36
6314 forum posts
15 photos

Usually, circlips with "half holes" are external, which need to be opened up to remove them from the groove in the shaft, or squeezed in to remove from a groove in the housing..

Occasionally, you can manage with a screwdriver to work the clip out, gradually

But there is less risk and frustration in using a proper pair of circlip pliers.

Howard

Edited By Howard Lewis on 29/06/2022 17:19:24

Peter Russell 429/06/2022 19:43:11
68 forum posts
1 photos

Howard thanks for the advice - Ive tried both and given up and ordered a set of new circlip pliers .

The assumption that it is external is correct, but there is no reason why the holes should have been halved theres plenty of clearance.

The one Im trying to get off is holding the spindle assembly into the top bearing..

Removing it is the only way in to get to the gear and remove/replace it.

Why use a nylon gear at this point with the difficulty there is in replacing it is difficult to understand the motor gear is brass and the next gear is also nylon and far more accessible.

At least on the mini lathe the bottom of the headstock is open and access is reasonable.

Andrew Johnston29/06/2022 20:22:03
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6678 forum posts
701 photos
Posted by Peter Russell 4 on 29/06/2022 19:43:11:

Why use a nylon gear at this point...

Cost; a moulded nylon gear is much cheaper to produce than cut metal gears.

Andrew

alan ord 229/06/2022 20:43:13
avatar
127 forum posts
35 photos

Peter, there are several You Tube video's showing how to replace the gear. A few years ago I checked a number of them out. As I have the Chester equivalent I searched Chester Champion 20 vs Hi Lo gear replacement.

Hope this helps.

Alan

Try G0704 Intermediate (High Low) Gear Replacement. Paret 1 removal.

By the way G0704 is the US Grizzly equivalent

Edited By alan ord 2 on 29/06/2022 20:51:15

Huub29/06/2022 22:54:22
100 forum posts
14 photos
Posted by Peter Russell 4 on 29/06/2022 19:43:11:

Why use a nylon gear at this point with the difficulty there is in replacing it is difficult to understand the motor gear is brass and the next gear is also nylon and far more accessible.

 

A nylon/metal gear combination is pretty silent compared to a metal/metal gear combination.

I something goes wrong, the "cheap" nylon gear will probably break before any of the more expensive parts of the drive train.

Edited By Huub on 29/06/2022 22:54:54

Edited By Huub on 29/06/2022 22:55:11

Hopper30/06/2022 03:04:52
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6694 forum posts
347 photos

Circlip pliers with the end of the jaws bent at 90 degrees often work better for awkward jobs like that. Their opening action is parallel, whereas the straight jawed pliers kick the circlip at an angle as they open or close.

Howard Lewis30/06/2022 12:11:13
6314 forum posts
15 photos

Good advice from Hopper.

Use the right tool for the job!

Quite often a cheap "nylon" gear is used as fail safe , rather than risk more expensive and complicated parts in the drive train

Howard

Edited By Howard Lewis on 30/06/2022 12:12:27

ega30/06/2022 12:29:47
2567 forum posts
203 photos
Posted by Hopper on 30/06/2022 03:04:52:

Circlip pliers with the end of the jaws bent at 90 degrees often work better for awkward jobs like that. Their opening action is parallel, whereas the straight jawed pliers kick the circlip at an angle as they open or close.

Good point and one which had never occurred to me.

However, the angle could be beneficial in helping to keep the jaws (or pins) of the pliers in engagement with the holes in the circlip.

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