tap drll Size chart

[David/toledo]

A long time ago someone posted a link to a tap chart that when by percentage for 0-80 to 11/2 12 thread it was by Standard Tool co is what is on my ratty copy. And now I can't find there web site. This chart would list from about a 80% to a 50% percent of thread. I had printed it out on two pages of 8.5x11 size paper. So I am looking for some links. The Starrettt chart Doesn't get it for me. I Order some and gave them to the school.
Thanks
David

 

[The real Leigh]

Little Machine Shop

I have a two-page chart that seems to match your description.

Got it from www.littlemachineshop.com

- Leigh

 

[David/toledo]

Close but not it
But thanks
David

 

[homemade]

Tap Drill Chart

May be a substitute you can use

 

[ReedReed]

It exist here

One place it is published was in a 3 1/4 x 5 1/4 inch booklet put out by Morse. It is titled "Machinist's Practical Guide". Original copyright 1929, last revised in 1957 (in my copy).

On page 36 it starts a table for thread percentages 50% to 100% by 10s, The screw size ranges from 0 to 1" It also has a 4 columns detailing 20 different material with percentage ranges for a specific tap drill.

My copy came from Queen City Supply Co. in Cincinnati, OH. Prolly does not exist now. :-)

I know it would help a lot more if I could copy/photo it, but I can not right now. Maybe it will jog someones memory that can.

- Reed

 

[67Cuda]

Tap Drill Chart

May be a substitute you can use

Thanks homemade.

Tom

 

[homemade]

You are welcome

 

[oldiron 2]

Tap Chart

David. Butterfield cataloque #31 has a tap chart on page329 that covers thread percentage from 0-80 to1.5-12. Hope this is some help.

 

[LESAWHARRIS]

Thread chart

There was a [50] page sorted by pitch & also by dia, plus number, letter & fractional decimal equivalents, had 65%, 75% & 85%:

Was a pdf by Steve Welcome back in 2001?

Cheers Les.

 

[TriHonu]

One place it is published was in a 3 1/4 x 5 1/4 inch booklet put out by Morse. It is titled "Machinist's Practical Guide". Original copyright 1929, last revised in 1957 (in my copy).

Mine is dated 1982. It is still available from Morse or Penn Tool Co.