29k15 shuttle gear remanufacturing

[29k15engine]

Some more footage of the new rack showing correct timing

https://1drv.ms/v/s!AoQ4CZYzE-ZEjijYYPdbCPapexKS

https://1drv.ms/v/s!AoQ4CZYzE-ZEjinebhd-7y_c5KCi

https://1drv.ms/v/s!AoQ4CZYzE-ZEjipwRRCQJiU9uWyd

And resulting stitches top and bottom, has not dropped a stitch at all even through 5 pieces of leather.

 

[shoepatcher]

great Job 29K15engine!   I have been playing with these gears and rack over the last couple of years.  SItamaco in Spain has the 29K1parts made in China I believe.  They are new.  The drive gears, short rack, following gears, shuttle carrier and set screws are all needed today for 29-4, 29K1-33, 29K51-56machines.  Other than Sitomaco, no one is making them.  thee is a big need for these parts.  Singer made over 250,000 29-4 machines!   

Gear #8608 was used in 29K1-4,10-18,21-23, 32, 33. right of of original singer parts book.  I know no one is making gears for the 51-56.

glenn

Very nice result!!!!!

glenn

[29k15engine]

so bit of an update, this is what I am thinking of for an adjustable rack. Rod either threaded M6 metric fine

 

or

 

smooth tube and rod with clamping bolts drilled through tube. Will need to hole up to reciprocating forces so undecided. All in steel, just transparent for drawing:)

 

Edited July 14, 2021 by 29k15engine

[29k15engine]

looking at simplifying the pivot end so here the part could be laser cut from 1 thickness, then 2 short tubes of id 6mm od 10mm welded to the laser cut part.

Then two opposing m6 nuts clamp the rack, keeping parts simple, available and easy to make.

 

 

Edited July 14, 2021 by 29k15engine

[chrisash]

Have you considered metal 3D printing

[29k15engine]

Thanks Chris for the suggestion

I think the price would be too much.

This would be quite simple to Mig or Tig together and the strength of metal could be chosed off the shelf to an appropriate spec (not sure what that should be yet, any suggestions for parts that would be metal on metal moving)

Edited July 14, 2021 by 29k15engine

[29k15engine]

I have bought some 6mm id 10mm od steel tube, so I'll try get the other part laser cut then hone the pivot hole to the correct diameter, then mig the tubes to the pivot part.

See where that gets me.

I have dropped the threaded rod by 2mm and adjusted the pivot section so the parts do not take up any more vertical height under the arm.

Thing is I could make this one solid section but I don't have access to a lathe, this way if people want to make this all they need is the tube, get the other piece laser cut or hand cut to dimensions and weld together.

 

 

 

Edited July 15, 2021 by 29k15engine

[29k15engine]

Just waiting now for the EDM pieces to be cut, hopefully in the next few days.

[chrisash]

The beauty of 3D metal printing is that you can do quite a few at the same time making it more attractive price especially cogs, worth asking for a quote in your country

[29k15engine]

You got me interested Chris, are we talking sintering? Do you have a web link of an example company in the US that would do this?