Tractor man | 11/03/2018 17:53:51 |
426 forum posts 1 photos |
Gents and Ladies, yet another item that bamboozled me until I cracked its secret. Quite an interesting item for those who have never seen one, i.e. me before I bought this. |
Tractor man | 11/03/2018 18:02:18 |
426 forum posts 1 photos | In the central image the items inside the centre hole are hardened steel rollers that float freely. No manner of adjustment. |
Mike E. | 11/03/2018 18:05:33 |
![]() 217 forum posts 24 photos | Looks similar to a floating reamer holder for chambering rifle barrels. |
Rainbows | 11/03/2018 18:06:40 |
658 forum posts 236 photos | Was going to say thread roller, might be time to replace those screws though |
mechman48 | 11/03/2018 18:30:49 |
![]() 2947 forum posts 468 photos | Tapping box... as the arbour rotates clockwise the rollers ? inside rotate / cam effect, to grip the tap & release when rotated anti clockwise....? sized for 4.5 to 8 mm taps |
Rik Shaw | 11/03/2018 18:33:44 |
![]() 1494 forum posts 403 photos | Not seen one before but I'd guess it to be either an "external" tailstock "centre" or a planisher. Rik |
Speedy Builder5 | 11/03/2018 18:53:45 |
2878 forum posts 248 photos | Still in business |
Neil Wyatt | 11/03/2018 20:00:46 |
![]() 19226 forum posts 749 photos 86 articles | A roller clutch chuck to hold rod for threading? |
Tim Stevens | 11/03/2018 21:43:19 |
![]() 1779 forum posts 1 photos | Or further to Neil's suggestion, an 'automatic' self tightening drilling chuck? Tim |
David Standing 1 | 11/03/2018 22:26:03 |
1297 forum posts 50 photos | It's a quick action drill chuck. |
Martin Connelly | 12/03/2018 11:09:06 |
![]() 2549 forum posts 235 photos | Is it a stud driver? You can buy them with three rollers that are in wedge shaped slots so that they tighten on the stud as the stud is being driven. Martin C |
Neil Wyatt | 12/03/2018 11:17:34 |
![]() 19226 forum posts 749 photos 86 articles | yes, I was pretty much right but over-thought it, it's just a quick drill chuck. |
Tractor man | 12/03/2018 13:27:27 |
426 forum posts 1 photos | Success, yes its a quick drill chuck.
Tapping would be a problem as you would not be able to withdraw the tap.
It works very much like a stud removal tool but is far too well made for that job.
Once in the quill drills can be fitted and removed without stopping the spindle and no pesky chuck key to find in the swarf!
well done Neil, Tim and David for identifying it.
|
David Standing 1 | 12/03/2018 13:35:06 |
1297 forum posts 50 photos | I cheated on my ID, there's one for sale on eBay.de |
Bazyle | 12/03/2018 21:33:16 |
![]() 6956 forum posts 229 photos | Not sure about this 'not stopping the drill' aspect. I have a keyless chuck that you push the body one way to open and the other to close but it has to be spinning to work. That means you have to hold the drill to do up and it will suddenly snatch and spin. Seems a daft idea. |
Tractor man | 13/03/2018 08:45:30 |
426 forum posts 1 photos | Bazyle, apparently these chucks were designed for production where stopping and starting the spindle wasted time, costing money. If you're constantly changing drills on a job it can come in handy. Plus the self tightening feature of the chuck in my original post is good for people with poor grip strength, I sometimes struggle with standard keyless chucks. |
Bazyle | 13/03/2018 13:13:14 |
![]() 6956 forum posts 229 photos | yes I appreciate my chuck was intended for production, and being 1MT only small drills however it's the bit about holding the drill bit in your hand that I find problematic. If you did a change every minute in a working day on the line what would happen to your fingers. |
Tractor man | 13/03/2018 16:25:09 |
426 forum posts 1 photos | Bazyle I didn't mean to teach you to suck eggs so I'm sorry old you thought I was. I think you have a wahlstrom type chuck? A knurled collar and a plane tapered nose looking like a keyed chuck but without a gear ring. I have one similar and it is quite a knack to change bits I admit, but I guess that workers would have gotten on with the job prior to elf and safety. I hold the shank of the drill rather than the flutes and seem to be ok changing at 1300 RPM. But obviously going from a 1/64 drill to 3/8 would need a speed change anyway. Maybe I will fit it in my jig borer with variable speed pulleys. |
jimmy b | 13/03/2018 18:16:10 |
![]() 857 forum posts 45 photos | How exactly does it work? I'm struggling with the whole idea!
Jim |
Tractor man | 13/03/2018 19:50:46 |
426 forum posts 1 photos | Jimmy, The chuck works by allowing the bit to.be removed and refuted while the spindle is turning. Holding the knurled collar and pulling down releases the drill, holding the nose of the chuck closes it on the bit. There is a video on YouTube if you look for quick release drill chucks. One book I use advises their use is good on a mill where the spindle takes time to slow to a stop. The chuck I posted about initially works by a set of cam operated rollers. Holding the collar while it is running opens the rollers and releasing it snaps them back onto the drill. Both types are good if your changing bits often. |
Please login to post a reply.
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
Sign up to our newsletter and get a free digital issue.
You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.