520 Pipefabricat
Plastic
- Joined
- Jan 8, 2021
I bought an early Harrison 13 lathe. I need toupgrade the tool post. What should I measure or be looking for? This is primarily a hobby lathe for me
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Largest Manufacturing Technology Community on the Web
Stay Connected:
Tool post conversion
- Thread starter 520 Pipefabricat
- Start date
- Replies 5
- Views 1,123
dundeeshopnut
Hot Rolled
- Joined
- Mar 27, 2020
Height from the top of your compound to the center of the spindle or tailstock.
texasgeartrain
Titanium
- Joined
- Feb 23, 2016
- Location
- Houston, TX
As mentioned, you first need to know height from top of compound rest to center line of spindle.
Now knowing that number, lets assume Aloris style qctp. They are sized axa, bxa, cxa etc. I think you'll want either bxa or cxa. No need to guess. Go to Aloris website. Google both bxa and cxa for their site. Look the dimensions of tp. Now google bxa-1, and cxa-1. The tool holders. Look at dimension of tool holder, and figure its mounting on tool post.
You want adjustment range to go above and below that centerline number you measured.
Now knowing that number, lets assume Aloris style qctp. They are sized axa, bxa, cxa etc. I think you'll want either bxa or cxa. No need to guess. Go to Aloris website. Google both bxa and cxa for their site. Look the dimensions of tp. Now google bxa-1, and cxa-1. The tool holders. Look at dimension of tool holder, and figure its mounting on tool post.
You want adjustment range to go above and below that centerline number you measured.
johnoder
Diamond
- Joined
- Jul 16, 2004
- Location
- Houston, TX USA
CXA was perfect on my ( actual swing 14 1/2" ) 12" Pratt & Whitney. If the Harrison is nearer 13" actual swing maybe a BXA would be a better fit
L Vanice
Diamond
- Joined
- Feb 8, 2006
- Location
- Fort Wayne, IN
You also need to know/decide what size tool bits you will use. I use a QCTP that can hold 3/4" tool bits, but I use 1/2" tool bits, so I need a riser under my tool post.
You subtract the tool bit height from the compound to lathe center. Then the balance is the maximum thickness of the support flange under the tool bit on the toolholder.
Larry
Tom A
Hot Rolled
- Joined
- Apr 26, 2009
- Location
- NW Florida
I use a CXA on my Clausing Colchester round head 13 x 36.
