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CARRIAGE LOCK

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ja2on:
this commercially available carriage lock is stepped down in the centre for more clearance
http://www.littlemachineshop.com/products/product_view.php?ProductID=2977&category=1

bogstandard:
Jon,

I do see a rather major issue with what you have done.

Because of the length of the bolt you have, that will allow the saddle to rock fwds/back, no matter how hard you tighten up. You might not be able to feel it by hand, but put a clock on there and I am sure you would see what I am on about.

If you look at Jasons commercial offering, what they have done is to reduce the distance between the bar and the underbed clamp to help prevent the problem I mentioned. Even with that, it is working on the wrong area, and even that is liable to the movement I mentioned.

I would have a look at the method I used. It does mean drilling the casting, but there is plenty of meat on it, and the final result will be even more rigid than the commercial one.

John

reel jon:
I have looked at the one you mention several times, apart from being a tight wad, i have seen such a lot of stuff on here that i feel that to buy one would go against the spirit of modding.

reel jon:
Once i get a bit braver i will have a go at drilling and tapping the carriage, i have seen your mod and thought it very easy to use, thanks for the pointers, it is very much appreciated.
As Benny Hill said in a famous sketch "LEARNING ALL THE TIME"

jemglen:
John, just to clarify...

The bolt tip, being brass, presses firmly against the ways but doesn't mark it? (sorry, beginner asking  :doh:)

Presumably I could turn up a brass bolt from a bit of hex bar (thinking out loud rather actually asking!).

I'd be worried about drilling square to the ways so maybe removing the carriage and drilling on the drilling press is a better idea?

Great -- and more importantly simple -- idea  :clap: also, the commercial one wouldn't fit my lathe which has a rectangular rather than h-shaped carriage.

Jerry

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