There's a label saying not to "remove" when running at high speed. I'm assuming that means rotate or move... What would be a "high speed" though? I just want to make sure I'm not going to damage the gears prematurely.
-
Welcome back Guest! Did you know you can mentor other members here at H-M? If not, please check out our Relaunch of Hobby Machinist Mentoring Program!
1127 gearbox question
- Thread starter ttabbal
- Start date
I have the pm1030 and the gearbox is very similar to yours. Mine also has the same warning. I have found that trying to shift the gears while the lathe is stopped is nearly impossible. It often doesn’t mesh correctly and will pop into the neutral space in between the settings. My method has been to have the lathe running and turn down to the lowest RPM possible. Then shift between gears. It takes some feel to get it in gear. Similar to a non synchro mesh transmission on a vehicle. I have yet to have an issue doing it this way and have never heard any grinding while doing it.
Thanks for the input guys. I noticed the same thing with the gears not meshing when stopped. I have been turning the chuck by hand and that gets it in gear easily. I also tried shifting while on, but at the lowest speed. Also worked fine.
The question was because it would have been easy to say something like ">500RPM" or "while running" rather than "high speed" which is vague at best. Of course, one would not "remove" the knobs either, so it is what it is.
The question was because it would have been easy to say something like ">500RPM" or "while running" rather than "high speed" which is vague at best. Of course, one would not "remove" the knobs either, so it is what it is.
Also known as Engrish. See www.engrish.com
I had a Weiss WBL290F which is pretty much the same as the PM 1127. I found shifting between ABC on the QCGB while stopped and manually rotating the chuck to be very difficult. The operator manual stated you can change positions under 500 rpm which I found to work best on this lathe.
