TAILSTOCK CAM LOCK

[LMMasterMariner]

Captain’s Lathe 3rd Mod

Hi everyone

This is 3rd modification of my lathe (11 x 26, bigger brother of Grizzly G0602).

As almost every lathe which I used on board ships had cam lock tailstock;
either longitudinal or transversal cam lock, I decided to make cam lock for my lathe tailstock.
Little bit more complicated than those already seen on web, but at the same time more heavy ‘dtuy’.
I like it to be oversized. Piston diameter is 24 mm and frame bolt diameter is 40 mm and it’s 40 mm high.
Shaft diameter is 16 mm and at cam spot it’s 10 mm in diameter. All parts are oversized.
Also added support on handle side of the tailstock. No modification was done to sliding plate underneath of ways, nor spring was added to it, as it wasn’t necessary. There is absolutely no slipping of tailstock under heavy loads; when drilling and supporting work piece with live center. Must say that I am very happy with this mod and I still wonder why I didn’t make it earlier.

Picture 01
Milled hole in tailstock with 16 mm end mill. (drilled it first)

Pictures 02 and 03
Milled bottom and top of oval shaped cavity in order to install frame block.
Had to remove coating and some cast iron in order to have flat bottom and enough room on top.

Picture 04
Milled piston hole with 16 mm end mill.

Picture 05
Also had to remove some material at frame block (piston housing) in order to fit inside cavity.

Picture 06
Parts. All made from stainless steel except snap ring and chrome plated handle
which was ordered from Taobao. (one size bigger than one used as tool post handle)

Picture 07
Parts assembled on top of milling vise (locked position)

Picture 08
Front view of tailstock (locked position – piston up)

Picture 09
Front view of tailstock (unlocked position – piston down) Note that handle can not go more down as the bottom of the piston is already touching the tailstock.

Picture 10
Observe 4.5 mm gap and sloped part where shaft is passing through. I still think that whoever designed this tailstock did it intentionally just in order to turn away people from making this modification and to make it harder.

Picture 11
Back view. It is visible that piece of 3 mm flat bar is placed at the place of the gap. Also put 2 washers there. Didn’t have flat bar of 4.5 mm thickness and I was too lazy to fabricate it.

Picture 12
Drawing with exact dimensions

Picture 13
Cam Lock in use - locked position


Hope that this info will help someone to make this mod.


LMMasterMariner