Search found 13 matches

by JPar
Wed Apr 18, 2018 10:23 pm
Forum: Milling Machines
Topic: Need help with a rockwell 21-100
Replies: 4
Views: 755

Re: Need help with a rockwell 21-100

I read somewhere that the head weighs about 150 pounds with the motor. I've yet to remove mine, but when I do I think I'll get some help or use a hoist. When I was younger I might have attempted to do it by myself, but there's no way I could handle that much weight at that height now. If you decide ...
by JPar
Wed Nov 08, 2017 1:25 pm
Forum: Milling Machines
Topic: Rockwell 21-100 Spindle Lubrication
Replies: 2
Views: 924

Rockwell 21-100 Spindle Lubrication

How is the spindle lubricated on this mill? There are two ball oilers (one on each side - see attached picture), but I suspect these are just for the quill. If that's correct, then how does one lubricate the spindle bearings?
Thanks,
John
OilHole.jpg
by JPar
Sat Oct 28, 2017 11:20 am
Forum: Milling Machines
Topic: Horizontal Mill Spindle Direction?
Replies: 17
Views: 2445

Re: Horizontal Mill Spindle Direction?

Thanks everyone. Counter-clockwise makes sense.
John
by JPar
Fri Oct 27, 2017 9:56 pm
Forum: Milling Machines
Topic: Horizontal Mill Spindle Direction?
Replies: 17
Views: 2445

Horizontal Mill Spindle Direction?

I hope you'll all forgive me for this stupid newbie question. I'm ready to wire up the horizontal spindle motor on my Rockwell mill, and I'm wondering which direction is considered the "forward" direction for the spindle. Clockwise, or counter-clockwise as viewed from the table side of the machine? ...
by JPar
Sun Oct 15, 2017 3:09 pm
Forum: Milling Machines
Topic: Bought a Rockwell 21-120 Mill
Replies: 20
Views: 3076

Re: Bought a Rockwell 21-120 Mill

Choprboy, thanks for the pictures and description! By exposing the hole to the rear, and using a small flashlight, I was able to access the gears well enough to see and oil them. They looked like they hadn't seen oil in quite some time.
John
by JPar
Sat Oct 14, 2017 10:24 pm
Forum: Milling Machines
Topic: Bought a Rockwell 21-120 Mill
Replies: 20
Views: 3076

Re: Bought a Rockwell 21-120 Mill

Can someone who owns one of these mills please explain how to lube the bevel gears that are inside the knee? I followed the instructions in the manual I have, but when I pull back the shield to expose the hole, all I can see is the cross slide feed screw. What am I doing wrong?
by JPar
Sun Oct 08, 2017 4:28 pm
Forum: Milling Machines
Topic: Bought a Rockwell 21-120 Mill
Replies: 20
Views: 3076

Re: Bought a Rockwell 21-120 Mill

I discovered that the back gear box has a drain plug. That will make draining & flushing the it a lot easier; no worries there. The spindle reservoir is a different story. The only usable access is via the filler hole. There is a breather hole as spro suggests, but it's small, about the size of a 10...
by JPar
Fri Oct 06, 2017 2:22 pm
Forum: Milling Machines
Topic: Bought a Rockwell 21-120 Mill
Replies: 20
Views: 3076

Re: Bought a Rockwell 21-120 Mill

The horizontal spindle hasn't been used in years, so I'm thinking it might be a good idea to drain and flush out the spindle oil reservoir, and also the back-gear box. If possible, I'd like to do it without disassembling everything. I would like to hear from anyone who has tried this, and whether or...
by JPar
Wed Oct 04, 2017 1:20 pm
Forum: Milling Machines
Topic: Bought a Rockwell 21-120 Mill
Replies: 20
Views: 3076

Re: Bought a Rockwell 21-120 Mill

Made a little progress today. I tested the horizontal spindle motor with the VFD, and the motor runs smoothly and responds to the VFD. It was nice to see that. Also, I figured out how to engage the back gear. The bracket that the VFD is mounted on interferes with the movement of the backgear lever, ...
by JPar
Tue Oct 03, 2017 3:31 pm
Forum: Milling Machines
Topic: Bought a Rockwell 21-120 Mill
Replies: 20
Views: 3076

Re: Bought a Rockwell 21-120 Mill

Thanks to everyone for the comments so far. In answer to some of the questions that were raised: 1. Re the model number, I agree that it probably left the factory as a horizontal-only machine, and the vertical head was added later on. I think I read somewhere that the vertical head could be purchase...
by JPar
Mon Oct 02, 2017 5:20 pm
Forum: Milling Machines
Topic: Bought a Rockwell 21-120 Mill
Replies: 20
Views: 3076

Re: Bought a Rockwell 21-120 Mill

For horizontal milling, the vertical head (including ram) is removed from the machine, and replaced with an overarm and outboard support as you mentioned. The arbor is powered by a second motor, which is behind the column. I've attached a picture that shows this. I believe I have all of the necessar...