Ball Bearing 2610911928

Use a bearing puller if you have one to get the old bearing off the armature, otherwise see the video on bearing removal on the eReplacementParts website. A rubber ring rather than a retaining clip is used to hold the bearing and armature assembly against the rear motor housing and the old ring, being black, can be hard to see in the depression in the motor housing. It may still be usable but it's probably better to install a new one in case the old one got torn up when the bearing failed. Install the new rubber ring, seat the bearing using the socket/mallet method (see video) and press the rear motor housing against the main housing enough to get the screws started. Torquing down the screws will draw everything snugly together. When you first start the motor, there may be a smell of burning rubber because the moving parts of the bearing may rub for a few seconds against some of the rubber ring, but this won't last very long.

1.) Bosch 4000 Table Saw w gravity rise stand. Removed blade and then table saw from stand (4 bolts)
2.) Turned table saw upside down and removed plastic table support frame from cast table to access motor (4 allen-head cap screws & 2 small bolts).
3.) Removed brushes (2)
4.) Removed motor end cap (3 screws) to expose rear motor bearing and wiring to motor field
5.) Removed motor housing from cast gear box/blade support (4 screws). Armature remained in gear box.
6.) Removed armature by pulling out of gear box and front bearing
7.) Removed front bearing retainer (2 screws) and removed bearing with inside puller. Replaced with new bearing and re-attached retainer.
8.) Removed rear bearing by cutting off with dremel and cutting wheel. The outer bearing had fallen off with ball bearings so only inner race remained on armature shaft and nothing for puller to grab to...so had to cut off.
9.) Replaced new bearing on shaft and cleaned armature with damp rag and a little brake cleaner.
10.) Removed wire nut caps from field wiring and rear motor cap (which contains speed control board). Removed 2 bolts that held field in motor housing. Removed field from motor housing by tapping out from rear.
11.) Replace with new field. Reattached wire nuts and tightened 2 bolts.
12.) Added grease to armature shaft gear end and reinstalled cast gear housing/blade support.
13.) Reassembled saw in reverse order
14.) Replaced saw blade
15.) Plugged in and ran like new. Parts for $100 saved my $600 table saw. Tool retailers wanted $300 minimum to begin repair which would be used towards the final repair bill. Glad I did it myself, but you should have some mechanical and electric motor knowledge and able to keep parts in order during disassembly.

I took the table saw off of the stand and turned it upside down. At first I thought it was just the brushes and when I took the old ones out they were not worn down but were chipped off at the contact end. So I checked the bearing and sure enough it was seized up. Ordered an new one and a rubber ring. I took the back end of the motor casing off and used a bearing puller to get the old one off the shaft, put the new one on and put it back together. simple and took less time than it would have taken to take it in to a repair shop.

1, Removed end cap from motor
2. Remove outer plastic case.
3. Removed plastic blade housing cover.
4. Removed front metal gear assembly cover.
5. Removed Armature from gear housing.
6. Used bearing puller to remove front bearing
7 Used Large 1/2 drive socket to install new bearing
8 Removed & replaced front rubber ring seal
9. Remove and replace rear bearing.
10. Cleaned gears and housing.
11. Repacked axle grease around gears, bearing and inside housing
12. Reassembled in the reverse order.

Note: The hardest part of this is reinstalling the two screws that hold the armature assembly to the front gear housing. There is a metal plate that the two screws that go through the housing into the metal plate on top of the armature. That plate is free-floating and there is about a 1/4" of clearance between the housing and the plate and the top of the armature assembly. Gravity is your enemy trying to get the plate and the screw to line up because there is NO room to put a screwdriver tip or anything inside the space. I tried for over an hour to get one of the screws started again with no success. Finally I went to my screw bin and found a 2" screw the same size and thread pattern as the original and use my scratch awl to line up one side of the plate to the hole. I use the long screw in the opposite side of the plate to temporarily screw it in and bring the plate to the top, where it was supposed to be, then removed the scratch awl, and put in one of the original screws and tightened it. Then I was able to remove the long screw and put the other original screw in the other side. After that was done I tightened both of the original screws and and rest took about 15 minutes. Maybe this will help someone else in doing this bearing replacement?
This repair was on a Bosch Model 4100 table saw, which by the way is a GREAT saw!

Rick

1. Removed the bearing.
2. Cleaned out the armature.
3. Installed the new bearing.
4. Installed the new brushes.
5. Installed the new motor cover/casing.

Removed old motor housing.
Replaced motor housing, armature, bearing, ball bearing, rubber ring, and carbon brushes.
Installed new motor onto saw.

1 Disassembled the saw to get to the motor.
2 Disassembled the Motor to get to the bearing.
3 Pulled the bearing off the shaft.
4 Pressed the new Bearing on the shaft.
5 Reassemble the Motor
6 Reassemble the Saw.

1. Disconnected the power cord.
2. Upended the saw onto its rear.
3. Cleaned all sawdust from the saw's work area.
4. Tilted the blade the full 45 degrees to access the motor housing screws.
5. Removed three screws and pulled the housing cap off.
6. Disconnected the three wires (be careful to reconnect them properly later AND I had to get three new wire nuts).
7. Removed the four screws holding the housing the pulled off the housing (the field wiring comes with it).
8. Removed old rubber ring, installed new ring and put the new bearing in the rubber ring.
9. Now for the armature. It's exposed with the old tail bearing still on it. The front bearing had to be gently forced out. I used a "fork" (as used in separating tie rod joints) and with that under the tail bearing tapped gently on its edge. Took a lot of taps but was easy and the armature came out of the front bearing.
10. NOW, the front bearing is retained with two screws which must be removed from the saw blade side of the mechanism. They are DIFFICULT to see (blow off all the sawdust! (Remove the blade, the blade lock mechanism and it's two screws).
11. Now you can see the two screws for the bearing retainer. Remove them and the retainer will fall off the other side.
12. Now remove the front bearing. It's easy but you will need a tool of some kind to hook from inside the bearing (like an automotive pilot bearing puller).
13. Now, make sure all the reassembly areas and parts are CLEAN. Clean the grease from the one gear inside the front bearing area and put in clean grease ( the modest amount).
14. I used an automotive ball joint press (portable one) to press on the bearings. They can be tapped (but one runs the risk of ruining one) Now, if you tap, tap on the bearing inner race if you are installing a shaft BUT tap on the bearing outer race if you are installing in a housing (i.e. tap on the race of the bearing where the friction is). A large c clamp will do it (huge). A shop press is better. But, I could not access the installation of the armature into the front bearing (no space).
15. Reassemble as disassembled. Now be careful. You probably better put the bearing retainer on following the installation of the bearing or you will have a modest amount of heartburn if you try to hold it in proper position through the fan. AND, by the way. the fan is delicate. Don't even touch it, if you can avoid it!

Now that was my successful technique and I hope I left nothing out. There is any number of methods to do all this. Good luck.

1. Removed motor housing
2. Removed seized bearing, installed new.
3. Installed new rubber bearing carrier
4. Removed motor bushings to reassemble housing.
5. Installed housing
6. install bushings

I removed the motor housing, and the ball bearing… replaced with the new ones, put it back together!..
That was it!
It is running again!