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Milwaukee 5321-21 (SER 354C) 1-1/2 milwaukee logo

 Milwaukee 5321-21 (SER 354C) 1-1/2" (40mm) Rotary Hammer Parts

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 Fig # Img Part Name Availability Price
1Ball Bearing
Part #: 02-04-0845
In stock
11 available
 $5.24
Add To Cart
3Fan Assembly
Part #: 22-84-0875
In stock
2 available
 $13.40
Add To Cart
*4Bearing Ball 12X28X8 2 Seals
Part #: 02-04-1206
In stock
2 available
 $6.21
Add To Cart
8Pivot Nut
Part #: 05-59-0100
In stock
2 available
 $0.74
Add To Cart
10Pivot Bolt
Part #: 05-77-0100
In stock
2 available
 $1.03
Add To Cart
11Screw, Metric,Pn HD (PT)
Part #: 05-88-3650
In stock
2 available
 $0.68
Add To Cart
12Screw, Metric, PN HD (PT)
Part #: 05-88-5910
In stock
4 available
 $0.68
Add To Cart
13Screw, Metric,Pn HD (PT)
Part #: 05-88-5930
Ships in 6 - 10 business days
 $0.68
Add To Cart
14Screw, Metric,Pn HD (PT)
Part #: 05-88-5940
In stock
5 available
 $0.68
Add To Cart
15Screw, Metric,Pn HD (PT-DG)
Part #: 05-88-9920
In stock
3 available
 $0.68
Add To Cart
16Screw, Metric,Pn HD (PT-DG)
Part #: 05-88-9930
Ships in 6 - 10 business days
 $1.03
Add To Cart
17Screw, Metric,Pn HD (PT-DG)
Part #: 05-88-9940
In stock
4 available
 $1.60
Add To Cart
19
Light Pipe
Part #: 31-01-0065
Ships in 6 - 10 business days
 $0.86
Add To Cart
221/4-20 X 2-1/2 Pan HD SC
Part #: 06-81-1805
In stock
4 available
 $2.45
Add To Cart
238-16X2-1/2" Pan Plast Torx
Part #: 06-82-7375
In stock
9 available
 $0.68
Add To Cart
Fig #ImgPart NameAvailabilityPrice
26M5 X 2.24 X 18 Plastite Screw
Part #: 06-95-6290
In stock
11 available
 $0.99
Add To Cart
27Thumbwheel, Numbered
Part #: 31-01-0035
In stock
3 available
 $3.08
Add To Cart
28
Service Nameplate
Part #: 12-20-5315
Ships in 6 - 10 business days
 $6.33
Add To Cart
*29Brush Card & Module SVC Kit
Part #: 14-20-1072
In stock
1 available
 $109.16
Add To Cart
*30Armature Kit Service
Part #: 16-30-0642
In stock
3 available
 $65.84
Add To Cart
31Service Field Atf
Part #: 18-30-1040
In stock
2 available
 $30.78
Add To Cart
*32Brush Card
Part #: 22-22-1531
In stock
2 available
 $31.81
Add To Cart
33Power Cord Blade Housing Receiver 120V
Part #: 22-56-0042
In stock
2 available
 $3.93
Add To Cart
3410' Cord Set (2 prongs)
Part #: 48-76-5010
In stock
19 available
 $29.02
Add To Cart
35Switch
Part #: 23-66-2195
In stock
4 available
 $18.87
Add To Cart
37Crankcase Assembly
Part #: 28-14-2541
In stock
2 available
 $60.48
Add To Cart
42Upper Handle Mount
Part #: 31-10-0140
In stock
2 available
 $1.71
Add To Cart
46Module Cover Black
Part #: 31-15-0613
Ships in 6 - 10 business days
 $4.62
Add To Cart
47Motor Cover, Black
Part #: 31-15-2053
In stock
2 available
 $8.04
Add To Cart
50Handle Half Left, Red
Part #: 31-44-2211
In stock
2 available
 $4.62
Add To Cart
Fig #ImgPart NameAvailabilityPrice
51Right Handle Half-Red
Part #: 31-44-2221
In stock
2 available
 $4.10
Add To Cart
52
Motor Housing - Red
Part #: 31-50-5101
Ships in 6 - 10 business days
 $11.06
Add To Cart
53Rear Cover - Red
Part #: 31-55-0281
In stock
2 available
 $7.13
Add To Cart
*63O-Ring Obsolete - Not Available
Part #: 34-40-4215
Discontinued
N/A
66O-Ring
Part #: 34-40-4490
Ships in 6 - 10 business days
 $0.68
Add To Cart
86Rubber Bearing Cup
Part #: 42-96-0125
In stock
4 available
 $1.71
Add To Cart
*92Brush Kit
Part #: 22-18-1353
In stock
3 available
 $16.02
Add To Cart
93Spring Obsolete - Not Available
Part #: 40-50-2220
Discontinued
N/A
94Bellows
Part #: 43-87-0035
Ships in 6 - 10 business days
 $3.99
Add To Cart
95
Isolation Kit Obsolete - Not Available
Part #: 43-87-0060
Discontinued
N/A
100Handle Cushion
Part #: 44-52-0590
In stock
2 available
 $5.87
Add To Cart
122Thrust Washer
Part #: 45-88-8555
Ships in 6 - 10 business days
 $0.68
Add To Cart
123Seal Handle
Part #: 45-06-0535
Ships in 6 - 10 business days
 $0.68
Add To Cart

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Drill Parts  Rotary Hammer Parts

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Discussion
Discussion for the Milwaukee 5321-21 (SER 354C) 1-1/2" (40mm) Rotary Hammer

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jddoyle
Question: Hammer Drill Slips

jddoyle

I have a 5321-21 Rotary Hammer Drill/Chisel. Sometimes it works just fine, but sometimes when you start to drill in concrete it will drill for a while and then start to slip. What could the problem be?
trailblazer
Reply: Hammer Drill Slips

trailblazer

I repair tools, and just from my experience I'd say its one of two things, either the shaft of your bit is wearing down, or possibly the gears inside the drill are wearing down. Hopefully that helps you!
I have a 3521-21 Rotary Hammer Drill and sometimes it works just fine and sometimes when you start to drill the bit will just stop. It seems like something is slipping. What could it be?
wildmanhunting
Question: Milwaukee Tool

wildmanhunting

have a 5321-21 large hammer drill will hammer but it won't turn even on highest setting won't that be the clutch service assem?
wildmanhunting
Reply: Milwaukee Tool

wildmanhunting

[QUOTE=wildmanhunting;8785]have a 5321-21 large hammer drill will hammer but it won't turn even on highest setting won't that be the clutch service assem? I have to fix this my self can't wait till the shop can get to it.
emo325
Reply: Milwaukee Tool

emo325

hello! i was looking at the schematic for the Milwaukee 5321-21 rotary hammer and you commented that it won't run even on the highest setting, this unit is equipped with a electronic module that controls the motor but before dismissing the module you must first check the power cord and switch for continuity and the the carbon for wear or damage and also inspect the armature and field. good luck!
trailblazer
Reply: Milwaukee Tool

trailblazer

does the hammer drill actually sound like it runs, and doesn't turn, or doesn't it sound like it runs at all?
trailblazer
Reply: Milwaukee Tool

trailblazer

Oh, didn't read that right. I guess it does run! You are right, it has something to do with that clutch assembly! Just tore one apart, and it possiblely might be worn down teeth on the clutch assembly.
Accessories
Accessories for the 5321-21

Adapters & Extensions:
See more adapters & extensions 

Spline-SDS-Max Rotary Hammer Adapter
$159.89


8-1/2" Spline-Hollow Core Bit Rotary Hammer Adapter
$58.95

725791
Spline-SDS-Plus Rotary Hammer Adapter
$116.47

fancyboxy