Atlas 7B Motor

[will.mcray]

I’ve acquired an Atlas 7B shaper with a couple of issues. The ratcheting gear is wore out and someone tried the pinning fix to the shaft. I plan to machine a new gear and shaft. The motor is not the original and was tack welded to a mount plate. At highest speed pulley the motor arcs. I was wondering if anyone has OEM data plate specs or if anyone has replace the motor, what did you go with.

Thanks in advance for your help.

Will


Sent from my iPad using Tapatalk

 

[RobertB]

From this manual: http://vintagemachinery.org/pubs/detail.aspx?id=3563

 

[Bi11Hudson]

The above post pretty much covers it. Mine has a 1/3 HP, 120 Volt single phase, NEMA 56 frame Baldor brand, farm duty TEFC. (totally enclosed fan cooled) I'm partial to the TEFC frame because , being totally enclosed. it is very good at avoiding chips and dirt.

.

 

[will.mcray]

Thanks. From the manual and motors back then, I wanted to know if today’s motor frames will work or if I need to shop for a vintage motor.

Thanks again. Now to male a new gear.

Will


Sent from my iPhone using Tapatalk

 

[Cooter Brown]

I replaced the 1/3 HP motor that came on mine with a 1/2 HP motor..... Make sure the motor is reversible, the one that came with mine was not reversible and spinning in the wrong direction..... I can't imagine how long the previous owners were running this machine backwards......lol The counter shaft pulley over the motor has an arrow on it to tell you the proper direction.....

Here is the motor plate.... 1/2 HP 1725 RPM 56 Frame 115Volts

 

[wa5cab]

Will,

Short answer to your question on current day motor frames is "yes". The main thing for you to look out for is the diameter of the motor shaft. Today, 5/8" diameter motor shafts are probably the most common on 1/3 to 3/4 HP motors. But in the 30's and 40's, 1/2" diameter was probably most common. The original shaper shipped with a 1/2" bore motor pulley. By the early 50's it had changed to a 5/8" bore with a 1/2" ID reducing bushing. So had the lathes and mills.

 

[will.mcray]

This is great information everyone and helps me a lot. Thank you.


Sent from my iPad using Tapatalk