Thread: Threading Charts?

Damien

I got one from Hare & Forbes a couple of years ago, they were on the counter. The Littlemachineshop
has charts on their web site.

http://littlemachineshop.com/Reference/reference.php

Regards
JohnQ

Hi Damien, a good Australian reference is the "Engineers Black Book" but at around $50 it would be for staff use only I imagine. You could photocopy the relevant page/s and laminate them and put them up on the wall near the drill press for the kids. Also many retail outlets selling drills, taps and reamers etc would have free handout folding charts with this info. P&N and Suttons may even come to the party with 50 copies for school use if contacted. The Engineers Black Book is great and I'm always using mine and I heartily recommend getting yourself a copy. Lots of useful info, laminated (and oil resistant) pages, and spiral binding make it workshop friendly IMO.

Hi Damien, most places that supply fasteners, drills,taps etc., should be able to supply the necessary charts. Whether they are still available is another story. If you can't find one, I think I have one that can be snail mailed to you.
Kryn

Starrett had a bunch of them such as this one: http://www.brokenbolt.com/images/sta...-tap-drill.pdf

If one is not enough you can go all out with this more detailed set from Starrett: http://www.jwdonchin.com/Starrett/Catalog/pdf/647.pdf

G'day Damien,
I would get in touch with Sutton, most of the thread chart giveaways I see are from them and they also have them for feeds & speeds and a number of other things as well. I haven't checked for a while but they were available for download from their website. I'd also imagine that if you contact them and explain you need them for your class rooms they will be more than happy to send some through to you.
Cheers,
Greg.

+1 for the Suttons chart, or try this link:

http://microadvances.com/drillchart.htm

Neil

I wonder if standard tapping drill charts are such a good idea in a school?
Most metric tapping drill charts use thread size - pitch, which is a little on the tight side*. This may lead to more broken taps than you'd like. It also depends on the drill sizes you will have available. No use telling them they need a 3.25 drill when they only have 3 and 3.5 to choose from.

The one from JQs link at least has a couple of % thread depth to choose from
https://littlemachineshop.com/Refere...DrillSizes.pdf

Stuart

*depending on what material you are using and assuming you aren't building something that requires full thread depth.

Thanks to everyone who posted. I have found these links great to get all this information together.

Dean

Originally Posted by goodwoody

Groovers, does anyone that you know of make/sell threading/drilling charts of both imperial and metric threads? These would be great for the school I work at. Regards Damien.

Groovers ? I suppose teaching Manual Arts ,ooopps, Industrial Technology with exposure to some way out elements of the student culture might prompt you to call us that, all being progressive and modern on the metalwork forum. Perhaps you teach engineering then. ( If so ok, you are forgiven- we understand - its from the stress ) for Yrs 11 /12 and a wall chart might be what you are looking for.

Try your local supplier/distributor/dealer of drills and taps. If none there, write a nice letter to Suttons /P&N ,or a similar company that manufacturers taps & dies. Remember a nice letter .Try not to mention groovers .

When you get it, get it laminated or sure as eggs some one will write on it, spray stuff on it, or otherwise find some way to make your efforts in obtaining the chart, wasted. Ours were laminated and had a frame and clear perspex cover them.

A couple of years back, Sutton produced a greaseproof pocket card drill tap data card. It's agreat little card with mobs of data but with small print .Ok for student eyes to read, but for those with glasses it is barely readable.Our local tool business rep bought a bunch with him when I invited him in to talk about industry and give us a machine tip tool demo.

Keep a limited number to hand out and get them back after use as they will, steal them, lose them, cut with tinsnips Etc.

Grahame the groover

Originally Posted by Stustoys

I wonder if standard tapping drill charts are such a good idea in a school?
Most metric tapping drill charts use thread size - pitch, which is a little on the tight side*. This may lead to more broken taps than you'd like. It also depends on the drill sizes you will have available. No use telling them they need a 3.25 drill when they only have 3 and 3.5 to choose from.

The one from JQs link at least has a couple of % thread depth to choose from
https://littlemachineshop.com/Refere...DrillSizes.pdf

Stuart

*depending on what material you are using and assuming you aren't building something that requires full thread depth.

The trick is to say have taps ranging from 6 to 12 mm and work the project requirements for drill and tap around the those tap sizes.
The occasional student would still manage to break a tap after the theory lessons,the teacher teachers demo, and even after watching his mates do it the correct way.State high school budgets just do not stretch to a full .1mm increment drill set. Sacrifices had to me made the text book correct procedure as against what we had to do to be cost efficient.

A teacher has to look at the 'this is likely to happen situations" and work around them. The students have to find the right tap drill and check the drill tap process ,sizing's with his teacher .Most of our drawings were drawn up as per " Tap M10 x 1.5, drill 10mm" so most kids had little trouble.

All taps and drills under 6mm were issued on request. Keeping an eye on 17 students and not have a sub 6mm drill broken of them takes a bit of work.It can become stressful on occasion.Solution, minimise the need to use sub 6mm drill. the students still learn to drill and taps and fewer drill are broken - everbody wins!

With the tap dril lcharts the students can still learn there is a correct way ,but are also made to realise schools have to endure some very real financial limitations which keep getting worse.This was one of them.


Grahame

I would have thought this generation in school would first look to phone apps for this sort of stuff. Itamco is a nice one for the iPhone. Free I think. There are many more.

Pete

[QUOTE=Grahame Collins;1779738

A teacher has to look at the 'this is likely to happen situations" and work around them. The students have to find the right tap drill and check the drill tap process ,sizing's with his teacher .Most of our drawings were drawn up as per " Tap M10 x 1.5, drill 10mm" so most kids had little trouble.


Grahame[/QUOTE]

Certainly wouldn't break the tap when tapping in this example GC, might have trouble getting those little grooves in the hole though

Originally Posted by Ropetangler

Certainly wouldn't break the tap when tapping in this example GC, might have trouble getting those little grooves in the hole though

Yes! Yes! Its what I deserve for talking to the Minister for War and Finances and typing an that email at the same time .Good to see some one was paying attention!

How about Tap M10 Drill 8.5 mm. then?

You would be amazed about the number that actually did drill the hole the same size as the tap diameter.
As far AS I can tell,it normally went like this:
Ques by student1 "wheres the drawing? Ans by student2 " Dunno."
Question by student 1 "What was that tap hole that old Collins was talking about Ans by student 2 " M12 "
So, student one, who has not yet looked for and checked the drawing, so student 1 then drills a 12mm hole.

Don,t get me started about about what we had to do to get them to keep the tap perpendicular in the hole.

Grahame

Don't worry Grahame, I have a pretty healthy respect for your nous, and realised that you had just suffered a brain fart as they say, as frequently happens to me I might add. You might say that I was laughing with you and not at you, if you follow. Cheers and all the best,
Rob.