Medium
15-30 minutes
This is an authentic manufacturer approved replacement item. It is commonly used on Milwaukee angle grinders. This sealed metal bearing helps to secure armature while allowing it to spin freely. Includes one (1) bearing per order.
To complete this repair you would need a screwdriver and pliers.
• Remove the side handle
• Remove the guard
• Remove the handle
• Separate the grinder
• Disengage the brushes
• Remove the fan
• Remove the gear case
• Remove the armature
• Remove the pinion gear
• Remove the front bearing
• Install the new bearing
• Reassemble unit and test it
Ball Bearing 02-04-0620
OEM part for: Milwaukee
Part Number: 02-04-0620
$4.99
In Stock
Ships within 1 business day 
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Product Description ?
- Classification: Part
- Weight: 0.01 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This part will fit the following 40 machines
Milwaukee
6140-33 (SER B70A) 4.5" Angle Grinder with Slide Switch View Diagrams & Manuals
6140-30 (SER B69A) 4.5" Angle Grinder with Paddle Switch w/Lock-Off View Diagrams & Manuals
6148-30 (SER B71A) 4.5" Angle Grinder View Diagrams & Manuals
6122-31 (SER B66A) 4.5" Rat-Tail Angle Grinder View Diagrams & Manuals
6148-31 (SER B72A) 4.5" Angle Grinder With Paddle Switch View Diagrams & Manuals
6148-33 (SER B73A) 4.5" Angle Grinder With Slide Switch View Diagrams & Manuals
6116-30 (SER B62A) 4.5" Angle Grinder With Paddle Switch W/Lock-Off View Diagrams & Manuals
6116-31 (SER B63A) 4.5" Angle Grinder With Paddle Switch View Diagrams & Manuals
6116-33 (SER B64A) 5" Angle Grinder With Slide Switch View Diagrams & Manuals
6160-33 (SER B76A) 6" Angle Grinder With Slide Switch View Diagrams & Manuals
6160-30 (SER B74A) 6" Angle Grinder With Paddle Switch W/Lock-Off View Diagrams & Manuals
6160-31 (SER B75A) 6" Angle Grinder With Paddle Switch View Diagrams & Manuals
6123-30 (SER B67A) 6" Rat-Tail Angle Grinder With Lock View Diagrams & Manuals
6123-31 (SER B68A) 6" Rat-Tail Angle Grinder View Diagrams & Manuals
6130-33 (SER C27A) 4.5" (115 mm) Angle Grinder View Diagrams & Manuals
6122-30 (B65A) Grinder View Diagrams & Manuals
0240-20 (C32A) 3/8" (10Mm) View Diagrams & Manuals
6146-30 (D02A) 4.5" Compact Angle Grinder View Diagrams & Manuals
6148-30 (B71B) 4.5" Angle Grinder View Diagrams & Manuals
6148-30 (B71C) 4.5" Angle Grinder View Diagrams & Manuals
6117-30 (C91A) 5" HP Angle Grinder With Paddle Switch View Diagrams & Manuals
6117-31 (C92A) 5" HP Angle Grinder With Paddle Switch View Diagrams & Manuals
6117-33 (C94A) 5" HP Angle Grinder With Slide Switch View Diagrams & Manuals
6117-33D (C95A) 5" HP Angle Grinder With Slide Switch View Diagrams & Manuals
6121-30 (C96A) 4.5" Compact Rat-Tail Angle Grinder View Diagrams & Manuals
6121-31 (C97A) 4.5" Compact Rat-Tail Angle Grinder View Diagrams & Manuals
6121-31A (C98A) 5" Compact Rat-Tail Angle Grinder View Diagrams & Manuals
6124-30 (C99A) 6" HP Rat-Tail Angle Grinder View Diagrams & Manuals
6124-31 (D01A) 6" HP Rat-Tail Angle Grinder View Diagrams & Manuals
6146-31 (D03A) 4.5" Compact Angle Grinder With Paddle Switch View Diagrams & Manuals
6146-33 (D04A) 4.5" Compact Angle Grinder With Slide Switch View Diagrams & Manuals
6147-30 (D05A) 4.5" Compact Angle Grinder With Paddle Switch View Diagrams & Manuals
6147-31 (D06A) 4.5" Compact Angle Grinder With Paddle Switch View Diagrams & Manuals
6161-30 (D07A) 6" HP Angle Grinder With Paddle Switch View Diagrams & Manuals
6161-31 (D08A) 6" HP Angle Grinder With Paddle Switch View Diagrams & Manuals
6161-33 (D09A) 6" HP Angle Grinder With Slide Switch View Diagrams & Manuals
2780-22 M18 Fuel Angle Grinder with Paddle Switch and Lock-Off View Diagrams & Manuals
2781-20 M18 Fuel Angle Grinder with Slide Switch and Lock-On View Diagrams & Manuals
2781-21 M18 Fuel Angle Grinder with Slide Switch and Lock-On View Diagrams & Manuals
2781-22 M18 Fuel Angle Grinder with Slide Switch and Lock-On View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Grinder Parts
- Drill Parts
- Electric Drill Parts
Repair Videos ?
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Ball Bearing
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Easy enough repair ome part fits neatly happy!
Milwaukee grinder: Each bearing came in it's own small package nice.
Fixed! Working smooth again.
The whole process was smooth, arrived in about 2 weeks (international shipping
Thanks replacement parts
Will order again if I need anything and it's cost effective for me ship international.
iGlobal -
November 7, 2023
Verified Purchase
Right Part. Quick Ship
Great that eReplacement Parts carried this bearing. Schematic was accurate and part was an exact match. For less than $10 I was able to fix my $100 grinder. Good to save the money and a tool that has worked well for me for longer than I remember.
Guest -
October 16, 2020
Verified Purchase
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Bad ball bearings
Jimmy - June 1, 2023
Tool Type
Grinder
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers, Socket set
Parts Used
Just removed the grinder casing with a screwdriver. And it all came apart to replace the ball bearing.
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Bearing wore out
MICHAEL - October 16, 2020
Tool Type
Grinder
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Wrench Set, Gear puller, torx bit
Parts Used
As with most things these days you have to have the right tool.
Not much to the repair if you have a set of Torx bits and a gear puller. You can get away without the puller but you risk damaging other parts as you remove the old bearing.
To repair, remove the head by taking out the 4 Torx screws. Remove nut on end of armature along with gear and washer. Put small puller on armature and remove whats left of your bearing... Get rid of any stray pieces in the head. Place new bearing on armature and push into place. Put washer and gear back then tighten nut to seat bearing. Put head back on and you're done.
Probably the trickiest part is if you pull out the entire armature as I did to check the second bearing and then have to compress the springs that hold the brushes in place. You don't want to crack either of them and it's a very tight space.
This was the first time I've needed to repair my Milwaukee grinder and it took probably 40 minutes. The next time it will take 10.
Not much to the repair if you have a set of Torx bits and a gear puller. You can get away without the puller but you risk damaging other parts as you remove the old bearing.
To repair, remove the head by taking out the 4 Torx screws. Remove nut on end of armature along with gear and washer. Put small puller on armature and remove whats left of your bearing... Get rid of any stray pieces in the head. Place new bearing on armature and push into place. Put washer and gear back then tighten nut to seat bearing. Put head back on and you're done.
Probably the trickiest part is if you pull out the entire armature as I did to check the second bearing and then have to compress the springs that hold the brushes in place. You don't want to crack either of them and it's a very tight space.
This was the first time I've needed to repair my Milwaukee grinder and it took probably 40 minutes. The next time it will take 10.
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Armature bearings had failed.
John - May 10, 2018
Tool Type
Grinder
Difficulty
Medium
Time
30-60 minutes
Tools Used
, Torx driver
1) Removed the side cover screws and split the two halves.
2) Unscrewed the 4 head screws to remove head.
3) Unscrewed armature bolt to remove drive gear and release armature.
4) Replaced armature bearings.
5) Put armature back in head, install drive gear and retaining nut and grease gears.
6) Screw down head plate.
7) Replaced brushes and then refit side covers.
Then tested.
2) Unscrewed the 4 head screws to remove head.
3) Unscrewed armature bolt to remove drive gear and release armature.
4) Replaced armature bearings.
5) Put armature back in head, install drive gear and retaining nut and grease gears.
6) Screw down head plate.
7) Replaced brushes and then refit side covers.
Then tested.
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All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
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