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Precision Gears and Machine Tools Ltd, Bodmin Road

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mattash
Rugby
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1 of 11  Mon 6th May 2013 4:46pm  
Member: Joined Feb 2010  Total posts:597

I worked at this factory for a very happy 12yrs 11mths. I was wondering if anyone can recognise this machine? There were 10 of them, of which I worked 2. This one is currently for sale in America.
Precision Gears and Machine Tools Ltd, Bodmin Road
LdeMain
Nuneaton, Warks
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2 of 11  Wed 8th May 2013 8:54pm  
Member: Joined Nov 2011  Total posts:36

Sorry, I have no recollection of the machine. My dad used to do some work at PGM, he was self-employed but used to service and calibrate the metal hardness testing machines, his name was Steve de Main. I'd love to know if anyone remembers him! Leanne
Precision Gears and Machine Tools Ltd, Bodmin Road
mattash
Rugby
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3 of 11  Thu 9th May 2013 7:13am  
Member: Joined Feb 2010  Total posts:597

Sorry Leanne, I think the metal hardness testing machines were in a different part of the factory. We worked in a self contained unit at the back of the main factory and the hardening shop. I think Mayjan might be able to answer your query but I have not seen her on here recently? Wave
Precision Gears and Machine Tools Ltd, Bodmin Road
Mick Strong
Coventry
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4 of 11  Thu 26th Sep 2013 6:13pm  
Member: Joined Sep 2013  Total posts:135

Looks like a tool and cutter grinder, used for re-grinding gear hobs.
MS

Precision Gears and Machine Tools Ltd, Bodmin Road
mattash
Rugby
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5 of 11  Fri 27th Sep 2013 8:17am  
Member: Joined Feb 2010  Total posts:597

Hi Mick, almost right, it is a "Periform Grinder" used for grinding gear shaving cutters. Tolerance was one-ten thousand of an inch, there were three different dressers for it to produce all manner of different profiles on the teeth of the cutter. Cheers
Precision Gears and Machine Tools Ltd, Bodmin Road
Mick Strong
Coventry
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6 of 11  Fri 27th Sep 2013 7:04pm  
Member: Joined Sep 2013  Total posts:135

Was that the blade type cutters for straight bevel gears?
MS

Precision Gears and Machine Tools Ltd, Bodmin Road
mattash
Rugby
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Thread starter
7 of 11  Sat 28th Sep 2013 6:53am  
Member: Joined Feb 2010  Total posts:597

A gear shaving cutter was used for shaving the correct form onto mass produced gears, ie. the gearbox in your car. Every gear that is made has to be shaved by a cutter to allow it to mesh properly. A shaving cutter could shave up to 50,000 gears before needing re-grinding to sharpen it. All cutters had different forms ground on them and that is where the skill came into setting the periform grinder for grinding them. On my machine I had a special dresser for producing intricate forms on the grinding wheel. One gear shaving cutter made for shaving one gear that went into a ship could take up to three weeks to grind because of the high tolerance. This cutter was then thrown away as this gear, 12ft in diameter, after shaving, was built into only the one ship. Thumbs up This is part of one but they came in all sizes and angles with different numbers of teeth on them. From a spur to 56 degrees.
Precision Gears and Machine Tools Ltd, Bodmin Road
Mick Strong
Coventry
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8 of 11  Sun 29th Sep 2013 4:31pm  
Off-topic / chat  

Mick Strong
Coventry
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9 of 11  Mon 30th Sep 2013 8:31pm  
Member: Joined Sep 2013  Total posts:135

On 9th May 2013 7:13am, mattash said: Sorry Leanne, I think the metal hardness testing machines were in a different part of the factory. We worked in a self contained unit at the back of the main factory and the hardening shop. I think Mayjan might be able to answer your query but I have not seen her on here recently? Wave
Hi, was this company run by a father and daughter?
MS

Precision Gears and Machine Tools Ltd, Bodmin Road
mattash
Rugby
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Thread starter
10 of 11  Tue 1st Oct 2013 8:07am  
Member: Joined Feb 2010  Total posts:597

Hi, it was family owned but not by father and daughter, although I think a small factory up the road from us was. Cannot recall the name though.
Precision Gears and Machine Tools Ltd, Bodmin Road
Mick Strong
Coventry
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11 of 11  Tue 1st Oct 2013 3:00pm  
Member: Joined Sep 2013  Total posts:135

Gears and Components?
MS

Precision Gears and Machine Tools Ltd, Bodmin Road

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