Tapmatic.

[Noitoen]

I have one similar to the photo and the tap is only held by the square part and is allowed to float around. It has thousands of 6 and 8 mm holes tapped into copper with a "compression flute-less" tap. This was late 70'ies in South Africa.

[plunger]

This is what it looks like with the collet nut off.

[plunger]

And inside the collet but with the cylindrical gizmo which is sitting to the right of the jacops collet inserted.As you can see even with the grub screws turned in as much as possible ,nothing will drive the tap head as the tap square shank is smaller than the backjaw. Its as if something is missing.

[oxford]

So I found this. I’m not sure if the issue you are having is tap related, a messed up jaw, operator error, or a combination of a few but it looks like you have everything you need for the head.

http://tapmatic.com/product_line_instructions_x_series_self_reversing_tapping_attachments.ydev

[oxford]

Ttt

[plunger]

Ttt

Thanks for this. I see my back jaw only has two slots. But it gives me something to work on.The 4mm tap square shank is smaller than the slots . I might have to make my own backjaw and an arm.

[IanPendle]

Plunger,

These units are generally used in a a production/semi-production environment, tapping many, many holes. You can buy series of taps with common square shank sizes, and PERHAPS(?) this is what Tapmatic assumes people in this environment will buy in bulk for their production run requirements. I know you are in SA, but perhaps it will be more logical to to buy a new tap or two with the correct square shank? (if available there).

Just a suggestion, not a criticism.........

Ian.

[plunger]

Plunger,

These units are generally used in a a production/semi-production environment, tapping many, many holes. You can buy series of taps with common square shank sizes, and PERHAPS(?) this is what Tapmatic assumes people in this environment will buy in bulk for their production run requirements. I know you are in SA, but perhaps it will be more logical to to buy a new tap or two with the correct square shank? (if available there).

Just a suggestion, not a criticism.........

Ian.

I have no problem with criticism .Are you saying your taps are a different shank size.? I thought about that but the collet tells me thats not the case. I could make an insert for the tap but just assumed Im doing something wrong or the tool is missing a part of it.

[IanPendle]

I meant that the shank and it's square are the same over a range of actual threading sections e.g. The squares are the same but the tapping portion can be M3, M4, M5 or M6.

[JRouche]

This is what it looks like with the collet nut off.

Thats what I didnt get? The extra piece. Go look at my pic and I dont have one of those "cage" looking parts. Whats it do? I need an upgrade!! LOL!! JR