What is the name for this type of hinge/bracket?

P

Pife-Ster

Plastic

Joined

Sep 12, 2020

• Sep 12, 2020

• #1

I've been trying to figure out what to google just to get a 2 piece set - I just need the discs. I figure I could machine it, but rather look for 10 or so sets before I start making them. Any help appreciated, I couldn't think of any other place that would know a name for this. Thanks

 

EPAIII

Diamond

Joined

Nov 23, 2003

Location

Beaumont, TX, USA

• Sep 12, 2020

• #2

Here you go. Hirth Joint or Coupling! And no, I did not know. It took a bit of Google "fu".

Hirth joint - Wikipedia

 

P

Pife-Ster

Plastic

Joined

Sep 12, 2020

• Sep 13, 2020

• #3

Awesome thank you

much appreciated

 

B

Bill D

Diamond

Joined

Apr 1, 2004

Location

Modesto, CA USA

• Sep 13, 2020

• #4

If you buy then you will have to attach them somehow to the arm and base. maybe solder, weld or glue.
Bil lD

 

J

john.k

Diamond

Joined

Dec 21, 2012

Location

Brisbane Qld Australia

• Sep 13, 2020

• #5

Ok ,Its a Hirth joint.....but still ask ,where do you get them .....I need some for Norton footrests ,cheapest I can find is 12GBP each(I.E. 24GBP a pair) ,which seems a bit steep for a glorified washer.....Need to be steel ,or ductile iron ,not ally.

 

D

DDoug

Diamond

Joined

Oct 18, 2005

Location

NW Pa

• Sep 13, 2020

• #6

john.k said:

Ok ,Its a Hirth joint.....but still ask ,where do you get them .....I need some for Norton footrests ,cheapest I can find is 12GBP each(I.E. 24GBP a pair) ,which seems a bit steep for a glorified washer.....Need to be steel ,or ductile iron ,not ally.

Click to expand...

IIRC bicycle seats use them in washer form.

Quickie example not sure of material:
Dia-Compe Serrated Washer for RGC, AGC, Superbe (Bag of 10) | Bikeparts.Com

 

J

jmead

Hot Rolled

Joined

Mar 29, 2006

Location

Island County, Wa

• Sep 13, 2020

• #7

Marine Supply vendor. Possibly awning, party shelter place.

 

P

PeteM

Diamond

Joined

Jan 15, 2002

Location

West Coast, USA

• Sep 13, 2020

• #8

Often things like percussion instrument supports, microphone booms, and photo supports as well. Most aren't hardened steel, though.

 

J

john.k

Diamond

Joined

Dec 21, 2012

Location

Brisbane Qld Australia

• Sep 13, 2020

• #9

Yes,they are everywhere ,beach umbrellas to windscreen on a 34 Ford ,...i dont need hardened ,just brazeable or weldable ....and not ally ,must be cast or pressed ferrous.,and about 1 1/4" in dia.

 

EPAIII

Diamond

Joined

Nov 23, 2003

Location

Beaumont, TX, USA

• Sep 14, 2020

• #10

Look at the photos on the web. Many are attached with screws that are counter sunk or counter bored below the level of the serrations. Or with tapped holes with the screws in the rear/outside.

Bill D said:

If you buy then you will have to attach them somehow to the arm and base. maybe solder, weld or glue.
Bil lD

Click to expand...

 

EPAIII

Diamond

Joined

Nov 23, 2003

Location

Beaumont, TX, USA

• Sep 14, 2020

• #11

One easy way to get a pair may be 3D printing.

Search Thingiverse - Thingiverse

I suspect that a plastic pair would serve for most purposes. They are intended to function under a compressive force that holds them together.

 

C

CalG

Diamond

Joined

Dec 30, 2008

Location

Vt USA

• Sep 14, 2020

• #12

john.k said:

Yes,they are everywhere ,beach umbrellas to windscreen on a 34 Ford ,...i dont need hardened ,just brazeable or weldable ....and not ally ,must be cast or pressed ferrous.,and about 1 1/4" in dia.

Click to expand...

I made my own for the Morini foot pegs when I moved them back under my butt.. ;-)

The Italian version is very coarse, , but the dividing head and a V ground end mill did just fine.
3 hours work to make a set of four IIRC

 

D

Dr. Rob

Hot Rolled

Joined

Nov 25, 2002

Location

Sweden

• Sep 15, 2020

• #13

These are also known as rosette discs or washers, perhaps primarily in association with cameras. Do a google search for rosette camera head or similar and you will find many.

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