Thread: Threading Charts?

Thanks again for this thread. I have installed a PDF viewer on my tablet and can have this information in my pocket.

Dean

Groovers, I have sent an email of to Suttons and just waiting to see what they say. Damien.

Groovers, I am trying to fabricate some bits and pieces to modify/enhance some hand tools. The pieces require 2 metal rods and at the end of them there is a thread that is a tad confusing.

This is what came with the drawing 8-32-2A-Rh. What does it mean? Damien.

I think it is a US designation -
#8x32tpi
2A(the grade)
RH (RH thread)

A #8 is 0.164" major diameter - a smidge over 4mm

Michael

8-32 is the thread size or #8 UNC

2A the thread tolerance

rh = right hand

Thanks people. All I need is time. Thanks again. Damien.

I got one of these as a wall chart http://www.goliath.com.au/Technical%20Information.htm you can download an A2 pdf, but then you have to print and laminate it.

Ray

Originally Posted by goodwoody

Groovers, I am trying to fabricate some bits and pieces to modify/enhance some hand tools. The pieces require 2 metal rods and at the end of them there is a thread that is a tad confusing.

This is what came with the drawing 8-32-2A-Rh. What does it mean? Damien.

Damien,
Ok you are now up to speed on what those tap specs signify - so from there a tapping drill size should be selected.

My Sutton card says a 3.4mm ( this dimension may vary slightly from chart to chart ) drill for 8-32. That size drill bit is unlikely to be kept at a school (state school at least). You may need to see your local engineers supplier for it.Easier still use the 3.5mm in the standard drill index .its only a tiny bit o size, but hey! I am a rough as guts boilermaker. If the thread is loose , put on a dab of Fitter in Bottle - Loctite.

None of us have any idea of your engineering knowledge - the extent of your experience in drilling and tapping -and that may have a reflection on whether or not your job could fail or succeed. A bit more information will be good if you need more help.
Do you require information on how to hold the work, on keeping the tap centered, the drill machine rpm for the drill bit?

The extensions that you propose, are they parallel to the tool shank axis or are they perpendicular to its surface 90 degrees to the axis? If so, how do you propose to hold and drill and tap the tool shank.?

Dependent on which result that you desire, there may be varying methods of achieving the outcome.

I have one Sutton thread card I found in a drawer today ,while looking for something else. PM me your snail mail address and I'll drop it in an envelope for you if you want it.

cheers
Grahame