Are Pfaff 335 and Adler 69 cylinder arm caps interchangeable?

[Uwe]

The question is, can you put a closed Adler 69 cap on a Pfaff 335 to avoid things getting tangled up in the open hook area? I'm hoping somebody has both machines sitting next to each other for a quick trial.

The Pfaff 335 uses open caps:

and The Adler 69 uses closed caps:

 

[SARK9]

I would bet the closed cap off the Mitsubishi CU-865 would fit it, since everything else on the arm assembly seems to be a 1:1 copy of the 335. The only problem is, they are probably an order of magnitude more scarce than the Adler 69's. You never know what you might run into, however.

-DC

[Uwe]

Good tip, DC! I actually have a Mitsubishi CU-865 project machine, but the hook cover is missing (as it turns out all three of my small cylinder arm project machines are missing the hook cover - argh!)

CU-865 parts appear to be totally unavailable these days - my supplier just shows *NLA* for the last few CU-865 parts I tried to order. But at least I can use it to take some measurements to make my own hook covers.

[RockyAussie]

I just checked my  335 and it has a closed end cap part Pfaff no 14638. The 69 Addler here wears a pfaff cap as well but has been shortened back about 1mm. The shorter cap will go on the 335 a bit far in but still clears the hook etc. Note the end on your 335 looks different to mine as pics shows I hope. Hope that is of some help. Brain

[dikman]

Uwe, my 335 also came with a closed end cap like Brian's, and the end also looks the same.

[SARK9]

11 hours ago, Uwe said:

But at least I can use it to take some measurements to make my own hook covers.

The business end of your 335 does look slightly different from my 865, as well as the other 335 pics in the thread. On my Mistu, the cap can essentially be regarded as a blind-ended 50mm O.D. turning bored to wall thickness of +/-1.75mm, with the location of the cap slide edges generated by making a full width, straight-across milled cut at +/-42.0mm taken at the diameter. The length on mine is 28.75mm, and the front recess for the mechanism under the needle plate is at 38.0mm. I can get with a cad program later and possibly put it in a form that makes sense.

-DC

[SARK9]

Q&D sketch-

 

-DC

Mitsu_cap.bmp

[Uwe]

Thanks for the part number and measurement references! That CAD sketch is nice - thanks DC!

I'll do some trials over the next few days. I'm hoping to find some suitable, readily available base part that I can easily modify to make these hook cover cups.

[brmax]

If you have a chance to view the installation tool part, of a Redi-sleeve or Speedy sleeve. These i have used many times with other work and could possibly be used here permanent or in prototype. I suppose the location of one of these in a "size" could be a pain.

Good luck

Floyd

[SARK9]

1 hour ago, Uwe said:

I'll do some trials over the next few days. I'm hoping to find some suitable, readily available base part that I can easily modify to make these hook cover cups.

You may find this of passing interest....

-DC