Thread: eBay (and other auctions) Metalwork Stuff

Thanks Ew, i grabbed a couple myself. By the time i saw the listing there was only 3 left, it said 8 had sold within 24 hours!
I left 1 for somebody else )

He also has mitotoyo mic's cheap, shame they are imperial or i would have grabbed a 25-50mm as well

Japanese lathe...
heavy metal lath takisawa 240vac 4.5 horse power | Miscellaneous Goods | Gumtree Australia Cardinia Area - Beaconsfield | 1030606797

Shame i dont have 4k hidden under the mattress

Digital Imperial Metric External and Internal Micrometers

This might be of interest to some folk

Does anyone know anything about these?

Could be handy for someone.

Jacobs Gear Hobbing Machine From CES KIT in Melbourne, VIC | eBay

Dean

There was an in depth discussion on I assume the HSM forum on that machine, improvements and limitations...

And on edit here is the link to the discussion but it is for a slightly different (improved?) design then Jacobs design

Gear hobber

This should be a nice machine.....don't know if the top speed would be a bit limiting though.

Milling Machine Abene VHF 3 Universal Made IN Sweden | eBay

Originally Posted by Oldneweng

Does anyone know anything about these?

Could be handy for someone.

Jacobs Gear Hobbing Machine From CES KIT in Melbourne, VIC | eBay

I've read a little about them. Although I did consider one as a project I'm not leaping to get one for a few reasons -

• For a start, the gears that it can make are not all that large - from memory up to around 90mm diameter. I think I asked Martin Models whether it could do a 6" gear and the emails stopped. 90mm is alright if you are making small things but that's only a 40t gear if you are making up 12DP gears.
• Despite the enthusiastic reception that the linked review gives it, having the drive shafts with universal joints means that there will be a slight change in angular velocity so the teeth will not be 100% even - it may not matter but if I'm going to spend that sort of money it needs to be an improvement on what I can currently do with a dividing head. In fact, as I can mill spur and helical gears as well as do worms on the lathe, I'm not sure what it would do for me that I can't already do (although admittedly the machine should be faster)
• The last concern is the rigidity of the machine. While it would do brass and Al gears, I'm not sure how it would go with steel of a reasonable DP. To me it looks like the sort of thing that is built as a display/ working model, but then I've never really liked equipment that won't do industrial scale things for me

I did think (and probably will think again) about making up a gear hobber that would do all this but it soon got very complicated once you started thinking about transferring motion and the various gear trains that would involve. I suspect too that once it was made (complete with all the change gears that it would require) most of the time that it was not idle it would end up cutting gears for other people - and you guys would not want that, would you?

Michael

Originally Posted by Michael G

I've read a little about them. Although I did consider one as a project I'm not leaping to get one for a few reasons -

• For a start, the gears that it can make are not all that large - from memory up to around 90mm diameter. I think I asked Martin Models whether it could do a 6" gear and the emails stopped. 90mm is alright if you are making small things but that's only a 40t gear if you are making up 12DP gears.
• Despite the enthusiastic reception that the linked review gives it, having the drive shafts with universal joints means that there will be a slight change in angular velocity so the teeth will not be 100% even - it may not matter but if I'm going to spend that sort of money it needs to be an improvement on what I can currently do with a dividing head. In fact, as I can mill spur and helical gears as well as do worms on the lathe, I'm not sure what it would do for me that I can't already do (although admittedly the machine should be faster)
• The last concern is the rigidity of the machine. While it would do brass and Al gears, I'm not sure how it would go with steel of a reasonable DP. To me it looks like the sort of thing that is built as a display/ working model, but then I've never really liked equipment that won't do industrial scale things for me

I did think (and probably will think again) about making up a gear hobber that would do all this but it soon got very complicated once you started thinking about transferring motion and the various gear trains that would involve. I suspect too that once it was made (complete with all the change gears that it would require) most of the time that it was not idle it would end up cutting gears for other people - and you guys would not want that, would you?

Michael

My ancient memories of hobbers are that they are complicated. I operated one that had either 4 or 6 stations in a circle. This was only for a few hours or a day I think. It was probably the size of your workshop.

There may be the odd use for a hobber but it would probably be more trouble than it was worth it to do all that sending of parcels around the country etc. I sort of had a similar idea when I saw this one on EBay, but of course had no idea what its capacity was. From what you say it will be a bit limited.

One of the problems with building a hobber, so it seems to me is that you need a hobber to produce all the gears to build it.

Dean

Is it my imagination or is every threading gauge in the set missing from this Mitutoyo thread micrometer?

Mitutoyo 0 25mm 0 01mm Micrometer Made IN Japan | eBay

Originally Posted by Oldneweng

One of the problems with building a hobber, so it seems to me is that you need a hobber to produce all the gears to build it.

Dean

Should be easier today with CNC.... I am ever more amazed at what CNC can do... As the years pass you can foresee multiple machines in the likes of jobbing shops will be replaced by machining centres with the appropriate software...

Originally Posted by .RC.

Is it my imagination or is every threading gauge in the set missing from this Mitutoyo thread micrometer?

Mitutoyo 0 25mm 0 01mm Micrometer Made IN Japan | eBay

No, there is one set in the mic....... Real useful that...

Originally Posted by .RC.

Is it my imagination or is every threading gauge in the set missing from this Mitutoyo thread micrometer?

Mitutoyo 0 25mm 0 01mm Micrometer Made IN Japan | eBay

There could be something in W7-C as well so way more useful now lol.

Phil

Originally Posted by Steamwhisperer

There could be something in W7-C

Thats just the slug from when the hole was punched in the plastic.... so not a lot of use

I must say I thought the anvils covered more range, but still one more set would cover 90% of the threads I cut. M2 and M3. M0.6-1.75.
I've only ever seen one mic with a full set of anvils, if I recall correctly I stopped bidding around $220. hehe

Stuart

I actually was starting to wonder if when you buy these thread micrometers you have a choice of what anvils to buy with it.... As I have never seen a complete set..