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Repair Parts Home    Power Tool Parts    DeWALT Parts    DeWALT Sander / Polisher Parts    

DeWALT DW421 TYPE 1 Random Orbit Sander Parts

DeWALT DW421 TYPE 1 Random Orbit Sander dewalt logo

 DeWALT DW421 TYPE 1 Random Orbit Sander Parts

Page A

 Fig # Part # Img Part Name Availability Price Qty
1578863-03
Armature With Bearings
Armature With Bearings Obsolete - Not Available
Discontinued
$0.00N/A
2807254-08
Field
Field Obsolete - Not Available
Discontinued
$0.00N/A
3445861-25
Carbon Brush (Sold Individually)
Carbon Brush (Sold Individually)
Note: Sold Individually
In stock
25+ available
$5.18
4445860-00
Brush Spring
Brush Spring
In stock
24 available
$2.86
5449899-05
Brush Ring, Brushes Sold Seperately
Brush Ring, Brushes Sold Seperately
Ships in 9 - 12 business days
$15.41
6144960-00
Switch (On-Off)
Switch (On-Off)
In stock
24 available
$4.39
7330072-97
Power Cord - 10', 18 Gauge, 2-Wire -Terminals not included
Power Cord - 10', 18 Gauge, 2-Wire -Terminals not included
In stock
5 available
$19.41
8330003-17
Ball Bearing (6000DU)
Ball Bearing (6000DU)
In stock
5 available
$9.83
9330003-03
Ball Bearing
Ball Bearing
Ships in 9 - 12 business days
$4.86
10616020-00
Fan
Fan
Ships in 9 - 12 business days
$3.25
11380382-00
Clamshell Set
Clamshell Set
Ships in 9 - 12 business days
$17.21
13330005-01
Cord Protector
Cord Protector
In stock
25+ available
$4.52
14380414-00
Clamp,Cord
Clamp,Cord
Ships in 9 - 12 business days
$1.22
15285252-00
Cap and Screws
Cap and Screws
Ships in 9 - 12 business days
$6.25
16144989-00
Lead Assembly
Lead Assembly
Ships in 9 - 12 business days
$1.07
Fig #Part #ImgPart NameAvailabilityPrice
17445964-00
Receptacle
Receptacle
In stock
8 available
$1.07
18825209-00
Terminal
Terminal
In stock
10 available
$1.05
19610078-00
Clamshell Shroud
Clamshell Shroud
Ships in 9 - 12 business days
$7.27
21286181-00
Retainer
Retainer
In stock
1 available
$5.94
22603637-00
Bearing Retainer (Self Tapping)
Bearing Retainer (Self Tapping)
In stock
6 available
$2.45
23330003-13
Ball Bearing (6202)
Ball Bearing (6202)
In stock
17 available
$4.86
24-A151281-08
5" Sander Pad Hook and Loop
5" Sander Pad Hook and Loop
In stock
25+ available
$18.38
24-B151662-00
Sander Pad 5" PSA No Vacuum Holes
Sander Pad 5" PSA No Vacuum Holes
In stock
25 available
$16.80
24-C151281-09
5" PSA-Adhesive Sanding Pad 8 Vacuum Holes
5" PSA-Adhesive Sanding Pad 8 Vacuum Holes
In stock
13 available
$18.38
25151549-00
Baffle
Baffle
Ships in 9 - 12 business days
$3.21
26151553-00
Dust Seal/Brake
Dust Seal/Brake
In stock
2 available
$5.69
27144983-07
Cover,Switch
Cover,Switch
In stock
17 available
$1.77
28386856-00
Dust Bag Asm
Dust Bag Asm
In stock
2 available
$14.29
29386856-00
Dust Bag Asm
Dust Bag Asm
In stock
2 available
$14.29
3056194-00
O-Ring
O-Ring
In stock
6 available
$1.07
Fig #Part #ImgPart NameAvailabilityPrice
608354-00SV
Dust Bag
Dust Bag
In stock
25+ available
$7.95
152365-00
Ring,O
Ring,O
Ships in 9 - 12 business days
$0.99
32700871-00
O Ring
O Ring
Ships in 9 - 12 business days
$6.31
33330019-11
Screw
Screw
Ships in 9 - 12 business days
$1.07
34098012-11
Screw,Machine
Screw,Machine
In stock
2 available
$1.07
35146929-01
Screw
Screw
In stock
7 available
$1.05
36330019-02
Screw,Plastite
Screw,Plastite
In stock
3 available
$1.05
37330019-08
Screw
Screw
Ships in 9 - 12 business days
$1.07
38330019-03
Screw
Screw
Ships in 9 - 12 business days
$1.07
39330019-11
Screw
Screw
Ships in 9 - 12 business days
$1.07
39A330019-13
Screw,M4X19
Screw,M4X19
In stock
25+ available
$1.07
40151652-00
Washer,Cone
Washer,Cone
Ships in 9 - 12 business days
$1.22
41398399-00
Ident. Label
Ident. Label
Ships in 9 - 12 business days
$1.07
43151669-00
Ring,Retaining
Ring,Retaining
Ships in 9 - 12 business days
$1.22
44144956-00
Nut
Nut
Ships in 9 - 12 business days
$1.07
Fig #Part #ImgPart NameAvailabilityPrice
50608354-00SV
Dust Bag
Dust Bag
In stock
25+ available
$7.95
861625383-00
Kit Box
Kit Box
Ships in 9 - 12 business days
$55.35

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Repair Stories
Symptom:
Worn Brushes
Parts Used:
Part Number:
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Entry Date:2013-12-13 14:40:45
3 of 4 customers found these instructions helpful
Brushes were worn out
Sander would only run for 2-3 minutes and shut off. I was not sure if it was brushes, but ereplacement description sounded like it. Old brushes did not look badly worn. Take off top plate on to of sander (2 screws); use compressed air to blow out dust and accumulated sawdust; find brushes and associated wire connection on each side of armature; using pliers, gently pull up on brass end of wire where it enters connector along outside edge of housing (can follow wire easily from end of brushes - connection just pulls straight up out of slot where brass wire end goes into slot; now push coil spring aside that holds each brush against armature; once coil spring clears opening where brush inserts - just slide old brush and connected wire out. Brush and wire assembly is about 4 inches long. Reverse procedure putting the new brushes back in. It is a little tricky to slide the new carbon brush into the plastic slot that aligns it with the armature since the rectangular brush and rectangular slot have to line up in the tight space - so check that the coil spring is completely out of the way of the slot without breaking off the coil spring (it is pretty resilient). Using needle nose pliers, grip to new wire by the brass end and slide it down into the connector where the old one came out - be sure it goes all the way down. Check that all of the wires are laying back into the plastic groves of the inner housing and out of the way of the top plate screw holes and screw the top plate back on. Surprising how much better new brushes make your sander run like new - I just about threw it away before trying this simple and relatively cheap fix.
Did these repair instructions help you?
Symptom:
Worn Part
Parts Used:
Part Number:
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Entry Date:2013-10-14 17:01:36
3 of 4 customers found these instructions helpful
Pad would not stop spinning, and had to much vibration so I replaced the bearing. I should have replaced the 151553-00 dust seal/brake, but didn't. I have ordered that and will replace when it gets
Remove three screws that retain the pad, and remove the center screw that holds the bearing. Split the bearing retainer, remove bearing, install new bearing and assemble. Quite simple.
Did these repair instructions help you?
Discussion
Discussion for the DeWALT DW421 TYPE 1 Random Orbit Sander

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Accessories
Accessories for the DW421

Sandpaper Discs:
See more sandpaper discs 
DW4309
25-Pack Hook and Loop 80-Grit 5" 8 Vac. Sandpaper Discs
$22.55

DW4311
25-Pack Hook and Loop 120-Grit 5" 8 Vac. Sandpaper Discs
$20.49

DW4314
25-Pack Hook and Loop 220-Grit 5" 8 Vac. Sandpaper Discs
$20.49

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