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DeWALT DW421 TYPE 1 Random Orbit Sander dewalt logo

 DeWALT DW421 TYPE 1 Random Orbit Sander Parts

Page A

 Fig # Img Part Name Availability Price
1Armature With Bearings Obsolete - Not Available
Part #: 578863-03
Discontinued
N/A
2Field Obsolete - Not Available
Part #: 807254-08
Discontinued
N/A
3Carbon Brush (Sold Individually)
Part #: 445861-25
Note: Sold Individually
In stock
25+ available
 $5.80
Add To Cart
4Brush Spring
Part #: 445860-00
In stock
25+ available
 $3.99
Add To Cart
5Brush Ring, Brushes Sold Seperately
Part #: 449899-05
In stock
5 available
 $17.26
Add To Cart
6Switch (On-Off)
Part #: 144960-00
In stock
11 available
 $4.92
Add To Cart
7Power Cord - 10', 18 Gauge, 2-Wire -Terminals not included
Part #: 330072-97
In stock
13 available
 $21.75
Add To Cart
8Ball Bearing (6000DU)
Part #: 330003-17
In stock
21 available
 $11.01
Add To Cart
9Ball Bearing
Part #: 330003-03
In stock
15 available
 $5.45
Add To Cart
10Fan
Part #: 616020-00
In stock
2 available
 $3.99
Add To Cart
11Clamshell Set
Part #: 380382-00
Ships in 10 - 13 business days
 $19.29
Add To Cart
13Cord Protector
Part #: 330005-01
In stock
25+ available
 $5.06
Add To Cart
14Clamp,Cord
Part #: 380414-00
In stock
7 available
 $1.37
Add To Cart
15Cap and Screws
Part #: 285252-00
In stock
3 available
 $7.00
Add To Cart
16Lead Assembly
Part #: 144989-00
In stock
11 available
 $2.99
Add To Cart
Fig #ImgPart NameAvailabilityPrice
17Receptacle
Part #: 445964-00
In stock
15 available
 $2.99
Add To Cart
18Terminal
Part #: 825209-00
In stock
14 available
 $2.99
Add To Cart
19Clamshell Shroud
Part #: 610078-00
In stock
4 available
 $8.14
Add To Cart
21Retainer
Part #: 286181-00
In stock
10 available
 $6.65
Add To Cart
22Bearing Retainer (Self Tapping)
Part #: 603637-00
In stock
22 available
 $3.99
Add To Cart
23Ball Bearing (6202)
Part #: 330003-13
In stock
18 available
 $5.45
Add To Cart
24-A5" Sander Pad Hook and Loop(Velcro)
Part #: 151281-08
In stock
25+ available
 $20.59
Add To Cart
24-BSander Pad 5" PSA No Vacuum Holes
Part #: 151662-00
In stock
25+ available
 $18.82
Add To Cart
24-C5" PSA-Adhesive Sanding Pad 8 Vacuum Holes
Part #: 151281-09
In stock
25 available
 $20.59
Add To Cart
25Baffle
Part #: 151549-00
In stock
2 available
 $3.59
Add To Cart
26Dust Seal/Brake
Part #: 151553-00
In stock
24 available
 $6.37
Add To Cart
27Cover,Switch
Part #: 144983-07
In stock
14 available
 $3.99
Add To Cart
28Dust Bag Asm
Part #: 386856-00
In stock
8 available
 $16.02
Add To Cart
29Dust Bag Asm
Part #: 386856-00
In stock
8 available
 $16.02
Add To Cart
30O-Ring
Part #: 56194-00
In stock
1 available
 $3.99
Add To Cart
Fig #ImgPart NameAvailabilityPrice
Dust Bag
Part #: 608354-00SV
In stock
25+ available
 $10.88
Add To Cart
Ring,O Obsolete - Limited Quantity
Part #: 152365-00
In stock
8 available
 $2.99
Add To Cart
32O Ring
Part #: 700871-00
In stock
2 available
 $7.08
Add To Cart
33Screw
Part #: 330019-11
In stock
21 available
 $1.99
Add To Cart
34Screw,Machine
Part #: 098012-11
In stock
13 available
 $2.99
Add To Cart
35Screw
Part #: 146929-01
In stock
22 available
 $1.99
Add To Cart
36Screw,Plastite
Part #: 330019-02
In stock
21 available
 $1.99
Add To Cart
37Screw
Part #: 330019-08
Ships in 10 - 13 business days
 $1.20
Add To Cart
38Screw
Part #: 330019-03
In stock
24 available
 $2.99
Add To Cart
39Screw
Part #: 330019-11
In stock
21 available
 $1.99
Add To Cart
39AScrew,M4X19
Part #: 330019-13
In stock
25+ available
 $1.99
Add To Cart
40Washer,Cone
Part #: 151652-00
In stock
10 available
 $2.99
Add To Cart
41Ident. Label
Part #: 398399-00
In stock
2 available
 $1.20
Add To Cart
43Ring,Retaining
Part #: 151669-00
In stock
2 available
 $1.37
Add To Cart
44Nut
Part #: 144956-00
Ships in 10 - 13 business days
 $1.20
Add To Cart
Fig #ImgPart NameAvailabilityPrice
50Dust Bag
Part #: 608354-00SV
In stock
25+ available
 $10.88
Add To Cart
861Kit Box
Part #: 625383-00
In stock
3 available
 $62.00
Add To Cart

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Sander Parts  Polisher Parts

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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
12 of 14 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
5 of 8 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?
Symptom:
Worn Pad
Parts Used:
Part Number:
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Entry Date:2015-02-10 09:40:51
0 of 2 customers found these instructions helpful
Replaced the worn out hook and loop pad on my random orbit sander
Simple , remove 3 screws and replace worn out pad.
Did these repair instructions help you?
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Accessories
Accessories for the DW421

Sandpaper Discs:
See more sandpaper discs 
DW4306
5-Pack Hook and Loop 220-Grit 5" 8 Vac. Sandpaper Discs
$5.24

SR5W000
6-Pack Hook and Loop 60-Grit 5" 8 Vac. Sandpaper Discs
$2.62

SR5R122
25-Pack Hook and Loop 120-Grit 5" 8 Vac. Sandpaper Discs
$15.87

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