LMS #1275 Tool post grinder- impressions

[J Tiers]

The only problem I can see with that TPG is the huge body of it....

I have a small Dumore with a 2" wheel, and I suspect it may stick the wheel out farther and have less obstructing it than that one with its 3" + wheel. The big box section, which is mostly empty space, could have been a LOT smaller, if they had not opted to bolt a big flanged bearing carrier into it from inside.

Even with the Dumore, I get into trouble with the pulley drive end (equivalent to where the drill chuck is on the pictured unit.)

Is it less bulky "in person" than it seems in the pictures?

[S_J_H]

J Tiers, yeah it's just as bulky as it looks in person. Honestly I could easily build something better from scratch. But I'm fresh out of motors and controllers. These are pretty good little DC 250 watt 110 Volt motors well proven on the mini lathes and the variable speed controller is fairly decent. That alone is not cheap.
A larger 4" wheel will give it better access. But like I said earlier, I bought it not for my lathe but for my project CNC machine which won't be using a tail stock. LMS has a more compact non variable speed model without the drilling side for 90$ less but it's only a 150 watt motor.

Steve

[dian]

neither coud i resist to unearth this.

[/QUOTE]

macona, how did you preload the 3/4/6 yaw chuck? did you use the compound or carriage for feeding in?

[Thomas Staubo]

macona, how did you preload the 3/4/6 yaw chuck

I'm not macona, but I have seen a nice solution for preloading the chuck (not tried it myself yet).
The article is here, halfway down the page: http://www.homemetalshopclub.org/news/aug04/aug04.html

Good luck!



.

[dian]

thanks for that. the spring shims a pretty clever, as they dont have to be exactly the same size.

[macona]

I am attaching the photo again, this time it is from my flickr account where it hosts the full size version of the photo. Click on the photo to take you to my flickr account where you can view the full size version.

If you look closely at the bore of the chuck you can see a ring that I used to preload the chuck jaws.


DSC03790.JPG by macona, on Flickr

[Clevelander]

A buch of skilled fellas why doesn't someone (HERE...HINT HINT) make a "kit" (add your own motor tool post grinder) and pedal it on eBay? It seems that the prices for tool post grinders are not proportional to their complexity (or is this just the newbie in me?).

[macona]

Meh, toolpost grinders are something people buy or make and never use. I have used mine something like three times. The internal one to clean up 3 sets of chuck jaws and external to do the taper on the D chuck mount on the lathe.

The Fischer-Precise spindles are great for this. They have ABEC7-9 bearings in them and you can tell in the finish.

[John Stevenson]

What about using one of the generic Chinese air or water cooled spindles ?

In built chuck, high speed, reasonable bearing for the odd job they need to do and they it can go work as a bolt on high speed head on a mill for small cutter or engraving work.

Two for the price of one.

[dian]

i am thinking exactly the same. do you think the bearings woud stand up to a 100 mm wheel (im thinking of the small ones like 0.8 kw/65 mm)?

btw, i contacted a local company that makes tpgs and they said they put p3 bearings in them. so maybe you dont need abec9 after all. their units sell for 8000 $ when complete.