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Tool Talk Discussion Forum

Procunier Tapping Head

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Slowpoke

11-05-2006 00:03:11




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Today I did 4 holes of 3/8-16 in 3/16 steel by putting the tap in the drill press and turning the chuck by hand so the holes would be straight and true. Not the easiest thing to do with the quill trying to pull up at the same time. Next to find a taping head on eBay to see how they work. Only two and neither had any technical info... so I decided to ask those who know the answers: people on this board. Here are some questions about one type on ebay (180045627635). First, does it take a range of taps or is an adapter required for each size? Does the handle control forward and reverse movement of the tap? Does the tap pull the head and the quill down or does the head and quill remain stationary? What speed does the press need to run? And finally, is the tap speed fixed or variable and what rpm would it be turning while threading? Thanks for your help.

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Don-Wi

11-06-2006 23:01:20




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 Re: Procunier Tapping Head in reply to Slowpoke, 11-05-2006 00:03:11  
Does your drill press have a reverse? if it does- and even if it doesn't to some extent, you can use the drill to drive a tap in the drill chuck. the best part about using a drill chuck to dirve a tap, espesically the bigger ones, is it'll spin in the jaws if it gets tight, unlike a driver that holds onto the square part and snaps it off.

As long as you have your part clamped to the table, it shouldn't be any problem to power tap with a drill press. Reverse is a big help for this too...


Donovan from Wisconsin

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Slowpoke

11-07-2006 00:26:18




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 Re: Procunier Tapping Head in reply to Don-Wi, 11-06-2006 23:01:20  
I haven't checked to see if the motor is reversible. It's an old 16 speed drill press and the slowest speed is about 200rpm. I wonder how a small car tranny is mounted on a press? Would a 3 speed/reverse garden tractor tranny be better? It wouldn't be as heavy and bulky. I have a Yankee Versamatic that I was thinking about trying. It's still in the original box...



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135 Fan

11-07-2006 13:54:11




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 Re: Procunier Tapping Head in reply to Slowpoke, 11-07-2006 00:26:18  
If it's 16 speed it should go slow enough on the slowest speed. The switch is the same as used on small older lathes. Square D I think makes them. I think there good for up to 1 hp. It's a bit of work putting a tranny on a drill press. It was definetly a conversation piece though. He did a lot of reparing of older machines that had obsolete parts like gears and stuff. He is one of few people I've met that knew a lot about just about everything. In WW II they thought he was a genious because he hooked up a coke machine to cool the barrels on machine guns used for training. I used to go visit him in his small shop. Sadly cancer took him several years ago at only 67 years old. He had a contract with transport Canada and every airport in Canada had a small coin operated J-copter people could try out their heli-copter skills on. He had a contract with the US air force for 15 computer controlled trainers worth about $2,000,000 each for training pilots for the Viet Nam war. The contract was cancelled because the war ended. Two did get built and I think at least one is at NASA. He would say "I came that close to making my millions" He got the original idea laying in a hospital bed thinking about how many people were being killed learning to fly a helicopter. Thought you might find it interesting. Dave

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135 Fan

11-07-2006 15:09:14




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 Re: Procunier Tapping Head in reply to 135 Fan, 11-07-2006 13:54:11  
I just looked on the web under Jaycopter and 1964 New York worlds fair and there was some pictures. I remember my dad saying there was a jaycopter at the municipal airport for a long time. I should have looked sooner. Amazing. Dave



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135 Fan

11-06-2006 23:18:19




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 Re: Procunier Tapping Head in reply to Don-Wi, 11-06-2006 23:01:20  
If it's a small drill press with a low speed, you can put a reversing switch on it. I knew a brilliant machinist that did that on his small belt drive drill. Other people have done it too. The only big difference with his drill press was that he put a transmission out of a toyota on it! He had lots of speeds. He invented the J-copter for training helicopter pilots. Vet smart old school precision machinest/toolmaker. Dave

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Davis In SC

11-04-2006 19:12:20




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 Re: Procunier Tapping Head in reply to Slowpoke, 11-05-2006 00:03:11  
There are several brands of tapping heads available. The Procunier is considered by many to be old and out-dated, but I still prefer them. They have a cork-faced internal clutch, that has a good feel, when used in a drill press. As a rule, I would use the lowest speed a drill press has, when tapping steel...



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wdTom

11-04-2006 16:43:48




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 Re: Procunier Tapping Head in reply to Slowpoke, 11-05-2006 00:03:11  
You may need a different size collet for each tap you wish to use. The tapping head I once used went in/forward when pressing down with the feed handle, and reversed out/back out when the feed was lifted.



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Tim Casbolt

11-05-2006 05:59:29




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 Re: Procunier Tapping Head in reply to Slowpoke, 11-05-2006 00:03:11  
Can't tell you much about a Procunier except that they are used extensively in industry, and are probably of good quality. I can tell you about Tapmatic, which appears to be very similar. You set a quill stop for the depth you want and then feed the quill into the hole. The tap spins into the hole at the speed you set from a provided chart and winds down to an internal stop in the head. When you pull up on the quill control the tap reverses at 1.75-1 and unwinds out of the hole. There is a clutch control to let the tap slip if it hits bottom. Mine has two collets included that cover the entire range of sizes. It is a small one that goes up to 1/4". The next size up goes from 3mm to 1/2", and there is a larger model that goes above 1/2". I would be glad to answer any other questions you might have.

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