Progress 2G pillar drill

[Derrick SimpsonParticipant @derricksimpson29752]

Hi, Derrick Simpson here, retired farmer. I have a large workshop with a lathe, various saws and lots of tools. Spend a lot of time fixing [i hope] local golf course equipment etc.

My Progress 2G drill stopped working y esterday and on dismantle found the TUFNOL large gear cog broken. I was hoping someone could advise how and where to purchase another. I dont use this machine often but its so handy for a slow turning drill.

Regards to all

Del

[Derrick SimpsonParticipant @derricksimpson29752]

[Kiwi BlokeParticipant @kiwibloke62605]

Derrick, Gate Machinery took over the Progress name, and offered support for the products. About 20 years ago, a very helpful chap at Gate (who was a friend of a friend, and will have retired years ago) provided me with a new Tufnol gear for my 2GS (same as yours, but floor-standing). The original gears were a dark grey plastic material, not fabric-reinforced, and tended to swell in the oil. Perhaps there are still a few, lurking in a dark corner, somewhere, although the web site makes no mention of machines of this age. Sorry I can't be more helpful.

**LINK**

Good luck!

[Brian WoodParticipant @brianwood45127]

Hello Derrick,

In the unlikely event of finding a replacement gear you might find someone on the forum willing to make you one from Tufnol

They will need to know the diameter, tooth count, rim and hub thicknesses [they might be different] hub bore and details of the keyway drive, it might be a spline fitting for example . A few pictures to go with the information will also be helpful

Regards

Brian

[Derrick SimpsonParticipant @derricksimpson29752]

Thanks for the replies,have not as yet completely removed the gear but will attempt to post photos when i do.

Also i will try a phone call with Gate Machinery.

Hope i can fix this ,its an old friend.

Cheers

[not done it yetParticipant @notdoneityet]

It can, of course, be fixed. Of that. there is no doubt. The gears may even be the same as used in the Meddings range of back-geared pillar drills?

[Kiwi BlokeParticipant @kiwibloke62605]

It's an helical spur gear, just to make life more complicated. However, as Graham Meek has demonstrated with his FB-2 gears, the proper helical form can sometimes be ignored, with the gear being cut with the cutter fed at an appropriate angle to the gear's axis of rotation. Of course, those with universal dividing heads and a universal mill needn't worry. It could also be 3-D printed?  [ Long way of saying that a DIY replacement isn't impossible…]

Edited By Kiwi Bloke on 20/06/2022 22:20:08

[Derrick SimpsonParticipant @derricksimpson29752]

Hi all, tried Gate Machinery but they don't have one.

taken photos but no measurements yet, not sure how to post these from my mac, thought i had made an album but didnt seem to work. Not great on computer.

If anyone is interested in trying to make one i could post it

[Derrick SimpsonParticipant @derricksimpson29752]

Think i managed to show photos

[not done it yetParticipant @notdoneityet]

Yes, def different to the Meddings.

[Brian WoodParticipant @brianwood45127]

Hello Derrick,

The gear construction is unusual and interesting in that there seems to be an internal bracer in the form of a split ring behind the gear teeth. Whether it is meant to be split is not clear, nor what it is made of..

Assuming the smaller drive gear to be made in steel, is there corresponding damage to that?

I am intrigued by this job, it would make an interesting challenge. I would need to examine it and the broken off pieces in detail before committing myself and cannot consider it anyway before the end of July. Why not send me an email so that we can go into the nitty gritty and sort something out that suits us both?

wood_@btinternet.com

Regards

Brian

 

Edited By Brian Wood on 22/06/2022 16:53:00

Edited By Brian Wood on 22/06/2022 17:11:59

[Brian WoodParticipant @brianwood45127]

Hello again Derrick,

Error in my email address, I don't use that one so frequently

it should read as follows wood_y@btinternet.com

Regards

Brian

[Ady1Participant @ady1]

[Kiwi BlokeParticipant @kiwibloke62605]

From 20-year-old memories, and thus suspect, I think that the metal hub, to which the gear is dowelled and fixed with screws, has its major diameter as the radial locating face for the gear. The hub fits quite tightly into the recess formed by the remnant of the 'upstand' on the face of the gear. The gear face inside and outside this 'upstand' have been faced down, thinning the clamping face and also the teeth (hope that makes sense). What looks like a retaining ring is the result of the 'upstand' having de-laminated.

The tooth width is small enough, I'm sure, to allow the gear to be cut without proper helical form, so the job isn't too bad…

[Derrick SimpsonParticipant @derricksimpson29752]

Thanks everyone for your comments and help, managed to get a piece of tufnol from plastic stockist .com, £20.00 delivered. Turned out the shape on my lathe [ i am not an expert] but it seems ok. Balked at the job of teeth so its now on its way to Brian who kindly volunteered to do the job.

Thanks everyone

[Bill Davies 2Participant @billdavies2]

Hi, Brian. Just a comment for others, that it is not to post personal email addresses, use a private message to send info to the recipient. Otherwise, you may end up with unwanted emails forever.

Good luck with the gear, old machines are nice to use and to look at, and deserve repair.

Bill

[Brian WoodParticipant @brianwood45127]

Hello Bill,

I used to spell out the "underscore" and the "at" but that seemed to make it difficult for people, so used to scanning these addresses in, to contact me. If I start getting unwanted mail I will junk that and create another address specifically for this sort of contact.

Thank you for your concern though

Brian

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