qualos junior lathe

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qualos junior lathe

This topic has 9 replies, 7 voices, and was last updated 1 January 2015 at 05:19 by Alfred Rofe.

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22 June 2014 at 10:44 #155983
kevin barron
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@kevinbarron12390
ihave a qualos junior australian made circa 1940 lathe without changegears and would like to cut new ones i have little experience and would be interested in any imformation at all regards dp etc for correct cutters and any info at all regarding said lathe very keen newcommer from oz
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22 June 2014 at 10:44 #23370
kevin barron
Participant
@kevinbarron12390
changegears
22 June 2014 at 14:59 #156014
John McNamara
Participant
@johnmcnamara74883
The Qualos is similar to but not a copy of the south bend bench lathe
They were well built.

**LINK**

Or

**LINK**

One lives across the street from me at a friends house, unfortunately without change gears.

Regards
John
22 June 2014 at 17:26 #156020
Bazyle
Participant
@bazyle
Boxford gears are 18 DP and Myford are 20. Hercus was another SB copy in Oz. The centre hole might be more important and I dont know that off the top of my head.

Edited By Bazyle on 22/06/2014 17:27:36
23 June 2014 at 01:19 #156052
Ady1
Participant
@ady1
Find the centre hole size and buy a set for a different lathe with the same holesize from xxxxbay etc?
23 June 2014 at 06:21 #156057
Pat Wright 1
Participant
@patwright1
Hi Kevin,

I have a Qualos Junior purchased about 30 years ago which was my learning curve, gave it little real use and now unused for last 10 years when replaced with a Taiwanese TY 11 X 24B.

The Qualos has a complete set of 11 screwcutting gears, unused by me, are in excellent condition except for one that has about two thirds of a tooth broken off. They are made of black bakelite (or something similar) and branded Qualos.

I have no idea what the DP is, but have measured the overall dia. of three which may be of help:

20 tooth 1.832" dia. give or take 2 or 3 thou. as readings vary but I have quoted torwards the higher end of all readings.

40 tooth 3.490" dia.

60 tooth 5.160" dia.

Just in case you ask I would not sell the gears separately from the lathe.

Pat

Hamilton, New Zealand

p.s. Tomorrow I will get professional advice as to DP and post it here.
24 June 2014 at 05:20 #156125
Pat Wright 1
Participant
@patwright1
Kevin

Went to a local CNC engineering shop and they measured with a gauge and said it was 12 DP.

Pat
24 June 2014 at 08:18 #156132
Roderick Jenkins
Participant
@roderickjenkins93242
Pat,

To get the DP, just add 2 to the tooth count and divide by the outside diameter of the gear. So, 42 divided by 3.49 is 12.

Cheers,

Rod
24 June 2014 at 23:01 #156204
Pat Wright 1
Participant
@patwright1
Rod,

That's a dandy little formula but maybe too complex for the CNC place I went to as they poked around in a cupboard and pulled out a tooth gauge just like and overgrown thread gauge!

Thanks Rod,

Regards,

Pat
1 January 2015 at 05:19 #174187
Alfred Rofe
Participant
@alfredrofe91484
I have a Qualos Junior Lathe however it came with out an instruction book does anyone have a copy they may email or send me. Alfred.

E-mail removed, contact by PM if you can help

Edited By JasonB on 01/01/2015 07:49:05
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