LookiSB 9 taper attachment

Glenn Brooks · Dec 9, 2016

Hi, I have a nice SB 9, circa 1925 model in excellent condition. It's been in storage for 60 years and needs to be cleaned up, but has very little wear.

Anybody know where I can find a taper attachment to fit this early model lathe?

Second Q: would a post war SB 9 taper attachment work on this early model lathe? I've read these early day SB 9's had different beds than latter models, hence completely different dimensions for many of the parts.

Thanks
Glenn B.

Ken-Bergen · Dec 9, 2016

I don't think the bed matters much. It's rebuilding the cross slide to work both with the tapper attachment and the feed screw, not at the same time of course.

Rodm1 · Dec 10, 2016

It will be expensive. You will need a whole new cross-slide assembly. It is not plug and play. These where fitted to each machine at factory. A late model or post ww version will not work. Entirely custom endeavor without proper or matched cross-slide. In that sense, the bed definitely matters. 1925 is a wide bed . Best bet would be to find a lathe that has a taper attachment installed.

kitno455 · Dec 10, 2016

My 1927 9 Jr saddle is not drilled for a taper attachment, but the general arrangement of the mounting surface looks the same as my 10L. The latter has ~4.75" centers on the mounting holes, and the crossfeed screw is approximately centered. Assuming your 9 is similar to mine, I think you could adapt a 10L taper attachment. The complexity would be in the cross-feed screw itself. The 10L uses a telescoping leadscrew, but the Series O lathes did not. I don't know if there is enough diameter or length in the crossfeed gear to allow that on the older lathes. You might have to switch to disconnecting the crossfeed nut instead.

allan

johnoder · Dec 10, 2016

Scan from 1933. To get any of these to work in the Series O days, you undid the hex head bolt just this side of compound, which disconnected cross slide from cross slide screw/nut. Note setting of compound rest is suggestive of its use to set depth of cut when the cross slide screw is disabled

Here is one of the most comprehensive of the How To Run A Lathe, from 1927. T/A instructions are on pdf page 83

South Bend Lathe Works - Publication Reprints - How to Run a Lathe #27 | VintageMachinery.org

Glenn Brooks · Dec 10, 2016

Thanks for the link to the SB How to Run a Lathe #27. Best example of that vintage book I've seen. I have the same copy, but it laid in a box for 60 years and is mostly indecipherable, pages fused together etc...

I'll go look at the cross feed screw and see what I have. But initially from comments above looks like a non starter. Maybe easier to mount a boring head in the tailstock for setting offsets. My main interest is making a bunch of collets in sizes not readily available for some old tools. So,precision matters, but not the length of the taper so much.

Thanks for the info!

Glenn

Search

Largest Manufacturing Technology Community on the Web

Search

LookiSB 9 taper attachment

Glenn Brooks

Aluminum

Ken-Bergen

Cast Iron

Rodm1

Aluminum

kitno455

Titanium

johnoder

Diamond

Attachments

Glenn Brooks

Aluminum

Similar threads