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Door closer locator thread

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Vortex O'Plinth
Posts: 950
Joined: Fri Feb 12, 2016 8:15 pm
Location: Gloucestershire

Re: Door closer locator thread

Post by Vortex O'Plinth »

daimlersteve wrote:
Tue Oct 08, 2019 9:51 am
Anyone --- Thread ?
As well as UNC and UNF the Unified thread system also specifies UNS (special) threads for use where the other sizes are not acceptable. The finest standard pitch for a 3/4" UNS is 27 tpi. If your thread is definitely 28 tpi then it could be from the Unified constant pitch series. These threads, specified as UN, are based on pitches 4, 6, 8, 12, 16, 20, 28, and 32 tpi and apply to a range of diameters, including 3/4". These are used in applications where the design considerations exclude the other series.

By the 1950's the Unified series fasteners were in almost exclusive use in the motor and other industries, so a probable match for your thread would be 3/4"-28 UN. As for all Unified threads the flank angle is 60°.
Nick

"Don't bother with the Air & Space Museum - there's nothing to see.......".

daimlersteve
Posts: 406
Joined: Wed Mar 09, 2016 11:20 am

Re: Door closer locator thread

Post by daimlersteve »

beauty, thanks Nick .

daimlersteve
Posts: 406
Joined: Wed Mar 09, 2016 11:20 am

Re: Door closer locator thread

Post by daimlersteve »

Took the sample along to my local machinist. No problem , close enough to 0.9 mm pitch . He'll thread up a 100 mm piece of brass at each end and i'll machine up the rest .
cheers, Steve

Zbigmak
Posts: 61
Joined: Sun Nov 19, 2017 10:45 pm
Location: Warsaw Poland

Re: Door closer locator thread

Post by Zbigmak »

Can anyone post some pics of a disassembled unit please.
Many thanks George

Zbigmak
Posts: 61
Joined: Sun Nov 19, 2017 10:45 pm
Location: Warsaw Poland

Re: Door closer locator thread

Post by Zbigmak »

These units are sometimes called door snubbers.
I am struggling to find any second hand female parts.
Has anyone got any pics or drawings so that I can try and make a couple?

daimlersteve
Posts: 406
Joined: Wed Mar 09, 2016 11:20 am

Re: Door closer locator thread

Post by daimlersteve »

Is John Cary still kicking in Boston ? he had a lot of such parts.
Steve

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Feathers
Posts: 88
Joined: Wed May 11, 2016 3:39 pm
Location: New York USA

Re: Door closer locator thread

Post by Feathers »

John Carey is in Ipswitch.
He is still going.
(978) 356-4745

daimlersteve
Posts: 406
Joined: Wed Mar 09, 2016 11:20 am

Re: Door closer locator thread

Post by daimlersteve »

Yep, good man .

Zbigmak
Posts: 61
Joined: Sun Nov 19, 2017 10:45 pm
Location: Warsaw Poland

Re: Door closer locator thread

Post by Zbigmak »

Do you happen to have an email for the gentleman?
Feathers wrote:
Thu Oct 24, 2019 2:32 pm
John Carey is in Ipswitch.
He is still going.
(978) 356-4745

daimlersteve
Posts: 406
Joined: Wed Mar 09, 2016 11:20 am

Re: Door closer locator thread

Post by daimlersteve »

He doesnt do email as i recall

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