Thread: Show us your Hercus

Originally Posted by blackfrancis

Check this excellent thread on converting a Southbend to larger dials with proper thrust bearings.
"http://www.practicalmachinist.com/vb/showthread.php?t=150571"
.

Good one blackfrancis..
What an excellent set up he has (and I aspire to!)
That old South Bend looked very good.

Finno

This thread is temporarily closed for Admin purposes. (HINT)

Thread is open again.
Splashing in the pool, will result in children having their pool pass revoked.

No splashing OK??

Hi its jomac6 again, the text book of turning 1990/91 is the last edition, in one of the posts someone asked is the last edition better than the previous editions.Well the 1990 edition is written for the 260, but basiclly its just an upgrade.
The Spare parts manual has just photos and part numbers for the lathe and accesories, Why I mentioned the other book, (260 lathe mainteance manual) is that it has the schematics of all the lathe parts, it is only 19 photocopies from the original Hercus book I found this handy for trying to discover where all the hidden allen screws are.
By the way if you do remove the handle and dials, PLEASE put a clean cloth or paper under them before unassembleing.
Why ??? cause when I pulled mine apart, and turned the dial round to see the brass pad that sits under the adjusting screw it fell out never to be seen again, So I turned up a piece of nylon/plastic cut it off to length to repace the minute worn out brass pad.
The good thing about that is now I have a much more flexible adjustment for drag.
Its all a mystery. John Holloway.
PS send me an e/mail about the maintenance manual

Chasing Dial, a thing of beauty
Here is the Chasing Dial for a Hercus model A with a metric lead screw.

It is a thing of beauty, but how does it work?

Does anyone have a manual explaining the use of this part.

Frank

The Gears engage on your Lead Screw.
You mount the Dial to suit the Pitch you wish to cut.
Check the Hercus book it explains what you need to do.

Thank you pipeclay, but some things I need explained are:
There are 3 gears marked 24,33,35? There is a peg and 3 matching holes.
There are 2 series of numbers on the face of the dial?
The Hercus book I have was downloaded from http://www.neme-s.org/Model_Engineer...%20Turning.pdf for an imperial lathe. It is a simpler setting and explained fully.

Do you have a reference for a metric lathe?

Thank you

Frank

The peg corresponds to the appropriate gear,Either 24,33 or 35 teeth.
The 24,33 and 35 tooth allows you to cut the following pitches and you engage the dial when the appropriate number on the top of your dial corresponds with the mark on the body of the dial.
24: .4(3),.45(2),.8(3),.9(2),1.2(3),1.6(3),1.8(2),2(3),2.4(3),3.6(1),4(3),6(3),8(3).
33: 1.1(3),2.2(3),5.5(3)
35: .35(5),.7(5),1.25(7),1.4(5),1.75(5),2.5(7),3.5(5),5(7),7(5)
The numbers in brackets are where to engauage the others are the different pitches.
These pitches can be cut anywhere on the dial it dosent matter where you drop in,
.2,.25,.3,.5,.6,.75,1,1.5,3.

Help!!!! I need a dial indicator and intend makeing one so can you measure the gears and all the other dimensions,
ie, number of teeth DP, PA PCD and outside diameter.
Its too dear to buy an indicator, even if you can get one.
Im'e set up to cut gears, so any help would be VERY much appreciated.
John H

Untill you find your required information are you able to reverse your lathe.

Thank you, pipeclay.

I am indebted to you.

Frank

just picked it up today