qualos junior lathe

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

The Qualos is similar to but not a copy of the south bend bench lathe
They were well built.

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Or

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

Regards
John

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

Find the centre hole size and buy a set for a different lathe with the same holesize from xxxxbay etc?

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.

Kevin

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

Pat

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

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

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