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Harrison M300 advice

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Dougie Swan26/04/2022 08:56:21
235 forum posts
53 photos


I have a Harrison M300 lathe and th project I'm working on requires a part to be bored between centres

The crosslide doesn't have any t slots but has v groves along its side

Are there any attachments available so that I can clamp an angle plate to it?



KWIL26/04/2022 10:19:11
3554 forum posts
70 photos

Here is one example. Copy of Harrison clamp on design (from Harrison M300 Manual) with a 7.25 Black 5 cylinder being bored between centres.

Highlander/Black5 SteamValve

steamdave26/04/2022 11:41:20
511 forum posts
44 photos

Here's an auxiliary boring table that I made for my M300. Clamps to the cross slide with wedge blocks as per Harrison's design. Plate was ex 12mm and screw holes are M10.


The Emerald Isle

Andrew Johnston26/04/2022 12:33:23
6602 forum posts
701 photos

I made a plate similar to that by 'steamdave' from hot rolled steel for my hydraulic copy unit:


I've never seen a similar commericlal item.


Dougie Swan26/04/2022 15:25:22
235 forum posts
53 photos

Thanks for the replies

Dave, can you send me pictures of the clamps?


steamdave26/04/2022 20:50:39
511 forum posts
44 photos


This is the best I can do. I sold the lathe a couple of years ago.

rear toolpost 1.jpg

From memory, the angle of the V is 70 degrees, but you had better check it!

The Emerald Isle

Dougie Swan26/04/2022 21:37:36
235 forum posts
53 photos

Thanks Dave

That makes sense now

That helps a lot


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