Shaper Tool Holder Question

[f350ca]

That helps Phil, but then you can get into chatter issues with so much tool in contact. Think about trying to take a finish pass on the lathe with a 14 thou per rev feed. Would be the same feed rate as 71 tpi.

Greg

 

[francist]

Is there an option to make a new ratchet gear with tighter spacing? I'm not sure what arrangement you have on yours, but mine uses a square tooth pawl and gear to turn the cross feed screw. I'm thinking if the teeth on the gear were closer together you would turn the lead screw less per detent stop (if that babble makes any sense at all).

I'm prepared to be completely out in left field here and it may not be a useful solution at all -- but I keep thinking about it!

-frank

 

[C-Bag]

While we're slightly off topic and bothering John. Any suggestions for improving the finish I get with my Peerless shaper. The table advance is 0.014 at the lowest stroke setting, as in one click of the ratchet. Even a shear tool doesn't leave a nice finish at that much advance. My old Logan would go down to about 2 or 3 thou advance.
Thanks
Greg

Yes, I've been hoping benmychree would come back to this too. That's why I've not been posting my usual off in left field/vaguely related stuff.

 

[f350ca]

Makes perfect sense Frank. The ratchet wheel is fairly fine now but could probably make one with a few more teeth. The problem is the gear arrangment they used. It multiplies the ratchet movement. You can take the gear off the cross feed screw and put it on the table vertical feed to face the side of a part. The big gear can't easily be changed, it has a friction clutch built in for a safety.

If I could move the ratchet wheel out to the feed screw I'd gain that about 1:3 ratio and be down to a resonable .005 thou feed.
So many projects so little time.

Greg

 

[francist]

Yup, it's exactly the same as mine then, just bigger. I see what you mean about the multiplier -- darn.

-frank

Edit: added photo

 

[C-Bag]

Makes perfect sense Frank. The ratchet wheel is fairly fine now but could probably make one with a few more teeth.

If I could move the ratchet wheel out to the feed screw I'd gain that about 1:3 ratio and be down to a resonable .005 thou feed.

Greg

So you are saying swap the two gears? That would solve the problem, but it sounds like the problem is with the ratchet gear?

Just out of curiosity I looked at the Atlas manual to see what the ratios were and the main difference is the ratchet wheel is almost the same size as the ratchet gear. In your case you'd have to mod the ratchet arm I guess to put a larger wheel with more teeth, right?

 

[f350ca]

Swapping the gears would give the desired affect, but the large one has an integral safety clutch driven by the ratchet wheel so not easy to swap. A larger ratchet wheel would work but then I'd have to build a different mount for the pawl. Moving the ratchet over to the screw shaft would be the easiest, maybe. Its on the never ending list.

Greg

 

[C-Bag]

I would be interested to see how that turns out if you decide to do it.

 

[f350ca]

I'll hopefully get to it someday, but this post might be long forgotten before then. lol

Greg

 

[vtcnc]

I had to advantage of buying most of my books before they got expensive; I'm blown away that Connolly could cost $500! I bought mine way back when it was just another book --- I have literally hundreds of books, from machinery catalogs, steam engineering, boat building, industrial biography (see Samuel Smiles "Lives of the Engineers"); I have the whole set, and a whole lot of books on local and early California history, plus books that just look good on the shelf ---. My family were early California settlers, who came here in 1845 when this was still a Mexican possession; My GGGF was a member of the Bear Flag Party and served with Fremont's Battalion under Paul Revere's grandson Joseph Revere.

The Smiles books are timeless...won't see anything like that published again! What I found really interesting about him is his series of "self-help" books titled, "Duty", "Character" and I think "Thrift"?