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Thread: GMF MM1A Grinder Shaft Thread
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1st Oct 2021, 01:08 PM #1New Member
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GMF MM1A Grinder Shaft Thread
Hi I’m Bob, I’m a retired electronics and communications technician. I arrived at this forum looking for information on the shaft thread size for a GMF MM1A grinder 1944/5 vintage, in order to purchase a taper shaft (or a pair of them, left and right thread). searching the internet I gather the thread could be either BSF or Whitworth, the shaft outside thread diameter is 15.5 – 15.8 mm/0.61 - 0.622 inch I would appreciate thread information on the above mentioned grinder if anyone can help. The local tool suppliers only carry metric tapers,
Thanks in anticipation.
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1st Oct 2021, 01:33 PM #2
Hi Bob,
Welcome to the MetalWork forums.
You have joined a great bunch of people always willing to help.
Thanks for having the courtesy to introduce yourself to the Forum. You will find plenty here who have the same interests as yourself.
Please take the time to navigate around the forums to view the varied and interesting subjects.
The is a large selection of places to see on our sub forums.
To do this, goto the the FORUM box in the top left hand corner of the screen. Click Forum Home and a scroll down page will come up.
Scroll down the page and the various help pages and sub forums shall be shown.
Please read the Terms of Use on the very top of the scroll down page - they are our rules.
To save time here's the link
https://metalworkforums.com/f90/t197...terms-tou-read
Many pages also have a sticky at the top.If you post its always a good idea to check the sticky ,if there is one there.
Grinder questions can be discussed in the General MetalWork forum.
We have talked about GMF bench grinder restorations many times here at MetalWork forums. The best place for this is to ask these questions on the Metalwork General or MetalWork projects if its an ongoing project..
If unsure about procedures, the how to's of the Forum, I am happy to help if you wish to PM me.
Again, welcome to our forums.
Grahame
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1st Oct 2021, 01:48 PM #3Senior Member
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Welcome to the forum Bob.
Ross
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1st Oct 2021, 07:25 PM #4Philomath in training
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so a 5/8" BSF will be 14 teeth per inch, a 5/8" WW will be 11 teeth per inch.
Michael
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1st Oct 2021, 09:49 PM #5Most Valued Member
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Gday Bob.
Can you post up a pic of your GMF grinder?
I have an old one which I reckon would be of that vintage. Happy to measure the thread tomorrow (just have to remember to do it).
regards
peter
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2nd Oct 2021, 12:49 PM #6Most Valued Member
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Bob.
I just measured my old GMF and the thread is 5/8" UNF.
regards
Peter
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2nd Oct 2021, 01:09 PM #7Senior Member
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Peter beat me to it, but I also checked my old GMF and it's also 5/8x18 UNF.
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2nd Oct 2021, 04:48 PM #8Most Valued Member
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My old grinder.
It was old when I got it in 1976. I put new bearings in it then and painted it.
Actually thinking about painting it again, but don't want to make a hasty decision on that.
Peter
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3rd Oct 2021, 07:26 AM #9
Imperial taper spindle for 8"polishing wheel
https://polishup.com.au/product/righ...-5-8-imperial/
l
Lots of other shops/sources too found under keyword of polishing accessories.
Grahame
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