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Carbon Brush Set

Part Number: 999021
Hitachi
Availability: 25+ in stock
Price: $5.39
Quantity:
Ships within 1 business day
Product Information
Manufacturer: Hitachi
Product Number: 999021
Classification: Part
Weight: 0.02 lbs.
Also Known As: Motor Brush Set
Shipping: Ships Worldwide
Description:
Set of 2 Carbon Brushes with wire leads and brush springs attached. The set contains genuine Hitachi replacement parts, and comes packaged in a Hitachi retail box.This brush set will fit the Hitachi tools listed at the bottom of the page.

• Worn brushes frequently are the cause behind a motor running poorly.
• Replacing brushes can fix a motor that’s operating intermittently.
• New brushes can restore a motor’s electric braking.


Carbon brushes are one of the most commonly replaced power tool parts. This is because carbon brushes are wear items, meaning that through friction and use they will gradually wear away until they need replacing. Worn brushes are a common causes of intermittent motor function, reduced electric braking and reduced motor power. A worn-out brush will often be worn down near to the wire lead and can be cracked, pitted, or burned. When replacing carbon brushes, be sure to inspect your armature for burns, cracks, or other damage which can indicate larger motor problems.
Products Compatibility

This item works with the following types of products:

  • • Band Saw
  • • Circular Saw
  • • Drill
  • • Grinder
  • • Impact Wrench
  • • Jig saw
  • • Laminate Trimmer
  • • Nibbler
  • • Planer
  • • Rotary Hammer
  • • Sander
  • • Saw
  • • Shear
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Questions & Answers

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Repair Instructions: Submitted by Customers Like You
3 of 3 people found this instruction helpful
Tool Type:
Miter Saw
Parts Used:
Carbon Brush Set - 999021
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver
Brushes wore out
Unscrewed the brush caps
Removed the old brushes
Installed the new brushes
Screwed the brush caps back on
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Tool Type:
Miter Saw
Parts Used:
Carbon Brush Set - 999021
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver
Brushes on hitachi miter saw needed to be replaced
Unscrew brush caps with flathead screw driver ,pull old brushes out ,and install new brushes .then screwed caps back on .
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Tool Type:
Miter Saw
Parts Used:
Carbon Brush Set - 999021
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver
Saw wouldn't run
1. Unscrewed the brush ports
2. Removed old brushes
3. Inserted new brushes
4. Screwed caps back on
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Tool Type:
Grinder
Parts Used:
Brush Holder - 313-777
Brush Cap - 936-551
Carbon Brush Set - 999021
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver, None
New brushes
Every thing came apart and went back ok
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Tool Type:
Miter Saw
Parts Used:
Carbon Brush Set - 999021
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver
Wouldn't turn on
Removed the brush caps
Removed the old brushes
Installed the new brushes
Installed the brush caps
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Tool Type:
Band Saw
Parts Used:
Carbon Brush Set - 999021
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver
Bandsaw not working
Removed the brush caps
Removed the old brushes
Installed the new brushes
Installed the brush caps
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Tool Type:
Miter Saw
Parts Used:
Carbon Brush Set - 999021
Electric Switch, Ls1018 - JM23100179
Soft Starter, Ls1018 - JM23100192
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Screwdriver
Saw wouldn't start after last cut
Made a cut, moved board and within 5 seconds tried to make another cut and saw wouldn't start. Thought lost power, nope, No noise or smell nor did I bind the saw. Figured the switch went but pulled and checked brushes anyway, good. Finished for the day. Next day brought in spare miter saw to finish job.
Pulled switch and checked with multi-meter, showed good. Power was getting to light on saw, shorted switch wires, nope saw still dead. I don't know what's inside the soft start can, figured some kind of electronics. An armature or field winding usually but not always gives warning or a smell so discounted an open winding but was prepared to test if need be. Ordered a switch just in case, brushes since they are a consumable item and should have on hand anyway and the soft start can. The spade connectors on my saw are small and the spade studs on the soft start can that was sent are big so no fit. I had to file narrower the studs on the soft start to fit the saw connectors. Once connected and reassembled I tried the saw, all back to normal.
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Tool Type:
Planer
Parts Used:
Carbon Brush Set - 999021
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver, Pliers
Brushes stuck.
Replaced the brushes.
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Tool Type:
Miter Saw
Parts Used:
Carbon Brush Set - 999021
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver
Worn brushes
Unscrewed brush caps
Removed old bushes inserted new brushes and screwed caps back on.
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Tool Type:
Miter Saw
Parts Used:
Dust Bag - 322-955M
Table Insert - 329-421
Carbon Brush Set - 999021
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver
Worn parts
1.Replaced The dust bag.
2. Replaced the table inserts.
3. Remove the brush caps and replace the brushes
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Reviews
5
Average Rating (out of 5):
4 Reviews
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  • The right parts
    This particular saw is wearing down brushes really quickly. But the brushes were exactly the parts I needed
    Thomas - June 27, 2019 Verified Purchase
    Great parts and quick delivery
    Great parts with a very quick delivery, will definitely be recommending the website to others, and using again myself!
    Guest - June 21, 2019 Verified Purchase
    Great part
    Perfect fit. Works as intended for my hitatchi miter saw
    Guest - May 22, 2019 Verified Purchase
    Great part
    Fit perfectly
    Michael - May 13, 2019 Verified Purchase
    Verified Purchase
    eReplacementParts Team
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    Product Information
    Manufacturer: Hitachi
    Product Number: 999021
    Classification: Part
    Weight: 0.02 lbs.
    Also Known As: Motor Brush Set
    Shipping: Ships Worldwide
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