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Bosch table saw model 4000

My table saw started to make a high pitched sound and when it was turned off, i could easily spin the blade. Nowl, it doesnt want to spin, the blade locked up. Some one was saying it has to do with the motor, the bearings or brushes.When i turn the saw on, the blade wont spin.My saw is about 2 yrs old.

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It sounds like the pinion on the armature and or gear are stripped. The only way to find out is to tilt the blade and remove the motor housing from the diaphragm and check it. If replacing the armature I would recommend also replacing the bearings and brushes as preventative

Posted on Dec 09, 2008

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2 Answers

Bosch 4000 table saw motor does not turn, very stiff


Possibly something has jammed inside the motor housing although unlikely.
Electric brake seized perhaps?
Carbon brushes need replaced?

These saws (and the newer 4100) have a history of motor problems, with the field winding and electronic motor speed control being the most common points of failure. If you go to an online tool parts supplier like toolpartsdirect- Bosch 4000 saw you will see a list of the parts available, as well as the most commonly ordered parts.

Thanks go to Jason for his blog post at:

http://mypeculiarnature.blogspot.co.uk/2013/07/bosch-4000-table-saw-fix-momentum-lost.html

May 23, 2014 | Bosch 4000 - 07 Electric Table Saws

1 Answer

Just replaced speed control unit and saw still spins at very slow rpm, guessing 20-30. any other possibilties. any way to check if new control unit is no good?


With the saw unplugged, turn the saw blade.
If it turns easily with no hangups I would guess its the field.
When mine went bad the blade went backwards very slowly.
I replaced only the field and not the armature and it's worked fine for over 2 yrs.

Right now I have it apart to change an armature bearing which was completely frozen up.

Aug 29, 2011 | Bosch 4000 - 07 Electric Table Saws

2 Answers

Bosch 4000 table saw run backward and slowly


I had the same problem with the Bosch 4000.
Changed the field for a new one...end of problem

Apr 28, 2011 | Bosch 4000 - 07 Electric Table Saws

1 Answer

Electric blade brake sounds like it is seized up. Upon starting table saw (bosch 4000), motor sounds like it is binding. How can I disengage the brake??


There is no electric brake on the Bosch 4100 table saw. If the motor sounds like it is being held back its possible the rear armature bearing has seized or the field coil is faulty. Both these problems cause the motr to not turn at full speed. The motor must be serviced.

Dec 08, 2010 | Bosch 4100 10" Worksite Table Saw

1 Answer

I can't get the rip fence on my bosch 4000 table saw to square up to the table. the fence is parallel to the blade but when locked down it tilts a hair towards the blade at the top. and it doesn't seem...


hi ,
this is the link to the bosch manual for your table saw , it has the assembly instructions ( just reverse them ) and full details of the alignment proceadures required to true the blade/guides and fences up .
http://mdm.boschwebservices.com/MDMCache/English%20%5BUS%5D/t10/0000000/r00160v-1.pdf

hope this helps

Jan 17, 2010 | Bosch 4000 - 07 Electric Table Saws

1 Answer

Bosch 4000 tablesaw won't start. Brushes replaced


I found that the remaining problem was a intermittent at the switch, which disassembly and cleaning resolved.
Tilting the motor / blade assembly down allows access from below, to the 3 screws fastening the controller circuit board cover on the brush end of the motor. From there, one can easily test exposed wires for power supply, see that brushes are contacting and clean accumulated sawdust.

Jan 06, 2010 | Bosch Electric Table Saws

1 Answer

Rowdy, The blade seams stuck. It wont spin freely even . I took out the blade and inspected the spindle. I didn't see anything that looked out of place. the motor turned hard without the blade attached....


check the bearings, especially the commutator bearing for seizing up, this is a common problem for the table saws. Let me know the exact model number and if you have a bearing puller you can fix this easily. if not most shops won;t charge much to pull and press on new bearings.

Dec 29, 2009 | Bosch 4000 - 07 Electric Table Saws

2 Answers

My Bosch 4000 table saw blade spins very slow. What the problem would be?


could be bearings locking up/seizing or do you smell any burning when running indicating the armature/field are burnt from possibly overloading with a dull blade.

Dec 17, 2009 | Bosch Saws

1 Answer

Bosh 4000 table saw , using dado blades.


no good solution for that problem. dado blades vibrate and cause the knob to turn. possibly a clamp on the knob to keep it in place.

tom

Nov 25, 2008 | Bosch 4000 - 07 Electric Table Saws

1 Answer

My tablesaw wont speed up and run. Bosch 4000 ten inch. It makes a klunk and starts to turn and slowly speeds up until its running, but still makes a knocking sound


Is it spinning the blade at all? If it is then it is unlikely to be an electrical fault. Have you considered a motor bearing fault? If the motor bearings are worn, it could turn freely by hand, but when powered up it would stutter and stall. The motor is basically a big electro-magnet so if the armature has enough lateral movement, when it is magnetized it could rub against the stator.
If the machine is buzzing, but not spinning the blade it is more than likely going to be caused by a faulty capacitor as this is the component that gives the motor the initial 'kick' in the right direction to get it spinning.

Nov 03, 2008 | Bosch Electric Table Saws

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