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-   -   Help needed with 1/2hp sewing machine motor (http://www.diychatroom.com/f18/help-needed-1-2hp-sewing-machine-motor-171290/)

toxo 02-07-2013 11:47 AM

Help needed with 1/2hp sewing machine motor
 
Hi guys. Newbie here looking for some help with a Singer electric motor. I bought an industrial machine to make a canopy for my fishing boat but it was too noisy so I decided to change the bearings to see if I could quieten it down a bit. I've got it half-way done and now I'm stuck.

This is the front end after I removed the front cover/bush thing.

http://www.unusual-gifts.pwp.blueyon...366k125022.jpg

This is the back end flywheel where the clutch (removed) engages.

http://www.unusual-gifts.pwp.blueyon...366k125018.jpg

The other side of the flywheel.

http://www.unusual-gifts.pwp.blueyon...366k125027.jpg

This is as far as I've got. Nothing wants to move. I've taken out the circlip that was on this side of the bearing and given it a tap from both sides with no movement. I'm wondering if the thin plate around the outside is hiding anything. There are four points around the edge that might want knock round or something. Help anyone??

http://www.unusual-gifts.pwp.blueyon...366k125026.jpg

curiousB 02-07-2013 01:52 PM

get a set of these for the bearing:

http://www.harborfreight.com/automot...-set-8832.html


And one of these for the flywheel:

http://www.harborfreight.com/automot...set-37824.html

toxo 02-07-2013 03:23 PM

Thanks curious. I've got a puller for the bearings and I've already got the flywheel off with a made up puller. I need to know what to do now to extract the innards to get at the back bearing.

micromind 02-07-2013 05:53 PM

Motor bearings are almost always pressed in. They can be a real bear to get out, sometimes a bit of heat applied to the outside of the bearing race can help.

As noted, just about the only way to remove a bearing from a motor shaft is with a bearing puller. If you don't have a press to get it back on, use a deep socket that fits over the shaft and contacts the inner race of the bearing, (but not the seal part) and lightly pound it on using a wood block for a cushion. Be careful to not ruin the other end of the shaft, placing it on a wood block helps a lot.

Rob

toxo 02-07-2013 07:31 PM

Quote:

Originally Posted by micromind (Post 1111861)
Motor bearings are almost always pressed in. They can be a real bear to get out, sometimes a bit of heat applied to the outside of the bearing race can help.

As noted, just about the only way to remove a bearing from a motor shaft is with a bearing puller. If you don't have a press to get it back on, use a deep socket that fits over the shaft and contacts the inner race of the bearing, (but not the seal part) and lightly pound it on using a wood block for a cushion. Be careful to not ruin the other end of the shaft, placing it on a wood block helps a lot.

Rob

Thanks Rob but I still need to know what end to bash to get the thing out. The front bearing is no problem but the back is solid. Bearing in mind that there was a circlip in the back side of the back bearing it would suggest that the bearing at least wants to come out toward the back but there's no way the armature can come out that way so do I bash the back end of the shaft? Paul

micromind 02-07-2013 08:00 PM

The circlip may have been there to keep the bearing from going too far out the back. It's also possible that there's enough distance from the end of the rotor to the frame that once the bearing is pressed out the back, it can be replaced then pressed back in until it's up against the circlip.

It sounds like there's no way to hold the frame if the rotor is pressed into the frame. Heat applied to the frame and not the bearing or rotor will expand the frame a bit and make it easier to press the rotor out.


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