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Scribe block repair

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Derek Lane04/11/2021 16:35:28
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725 forum posts
165 photos

First small simple project to practice on with my new machines. It may not be worth it for the price of the item as it is a second scribe block that I have it came to me with surface rust on it.

It is a Moore & Wright scribe block adjusting arm that fits into the block. I still need to drill and tap a hole for the adjustment screw and also make the screw as well as can be seen in this photo.

pic 3.jpg

As can be seen the original looks in a poor state and the thread for the adjustment screw has stripped

mechman4804/11/2021 17:38:16
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2947 forum posts
468 photos

Got to start somewhere; why not with a simple repair job, the first of many no doubt, looks a good finish.

George.

Jeff Dayman04/11/2021 18:05:41
2223 forum posts
47 photos

Nicely done Derek! look good. Ready for the next hundred years of service!

Nigel Graham 204/11/2021 19:24:06
2056 forum posts
28 photos

Yes - I think that would pass M&W's QA department.

Howard Lewis04/11/2021 21:16:13
6032 forum posts
14 photos

Model Engineers don't throw things away!

They repair them, sometimes to better than new!

Howard

SillyOldDuffer05/11/2021 14:55:39
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8513 forum posts
1914 photos

Derek's version looks better than the original. Is it me, or is the worn out item an alloy casting?

Dave

Derek Lane05/11/2021 17:02:15
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725 forum posts
165 photos
Posted by SillyOldDuffer on 05/11/2021 14:55:39:

Derek's version looks better than the original. Is it me, or is the worn out item an alloy casting?

Dave

Whatever it is it is light like Ali but easily damaged the rough area on the side I thought was raised but it is not.

I tried to get it finished and assembled today but what with shopping having a new carpet played and a new bed base installed workshop time has been limited. I did try to identify the thread on the thumb screw but could not so I will just make it with the taps and dies that I have a 5/32nd UNF is close as well as a 2BA but neither are the same so a new thumb screw will also need making and a threaded hole in this piece need doing after I have ordered a drill bit for the new thread why can't these things be simple

Tony Pratt 105/11/2021 17:47:04
1934 forum posts
12 photos

Can hardly believe someone made a scribing block arm out of Aluminium let alone M & W as a softish metal is totally unsuitable for this purpose,but there it is. I'm thinking someone has made a replacement in the past?

Tony

Edited By Tony Pratt 1 on 05/11/2021 17:50:31

Journeyman05/11/2021 18:07:42
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1147 forum posts
230 photos

Bed and carpet in the workshop, sounds very cosylaugh

John

Howard Lewis05/11/2021 20:29:22
6032 forum posts
14 photos

If the tread is not BA might it be something like 3/16 BSF?

Would not expect M & W to use something odd like 3 BA or ANF (Unified )thread.

But if you have to make an adjusting screw as well, you ncan use whatever seems most suitable, based on the equipment available.

Howard

Derek Lane05/11/2021 22:50:49
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725 forum posts
165 photos
Posted by Howard Lewis on 05/11/2021 20:29:22:

If the tread is not BA might it be something like 3/16 BSF?

Would not expect M & W to use something odd like 3 BA or ANF (Unified )thread.

But if you have to make an adjusting screw as well, you ncan use whatever seems most suitable, based on the equipment available.

Howard

Tomorrow I will have a good look with a thread gauge to see what that says. I have UNF and Ba dies to check against but not BSF so I will be making new using the UNF threads.

Derek Lane05/11/2021 22:53:34
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725 forum posts
165 photos
Posted by Journeyman on 05/11/2021 18:07:42:

Bed and carpet in the workshop, sounds very cosylaugh

John

After having a new workshop and a lathe and milling machine I thought it a good swap to have the bed and carpet along with double glazing fitted to keep the wife happy, which also means I can have more workshop timewink

Howard Lewis06/11/2021 15:25:13
6032 forum posts
14 photos

Ooh! A double glazed workshop with carpet and a bed!

Journeyman06/11/2021 18:20:18
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1147 forum posts
230 photos

Appeasing the 'Domestic Authorities' is always a sound workshop techniquewink

John

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