Part Location Diagram of 34-40-1870 Milwaukee O-ring
See part A-37 in the diagram
( Grid squares measure 1x1 inch )

O-ring 34-40-1870

Manufactured by:
Milwaukee
ERP Number:
ERP10126953
Part Number:
34-40-1870
Original Equipment Manufacturer ?
In Stock
Delivers in 3-5 Business Days!
Minimum Quantity of 2 required

Easy 

Less than 15 mins 

(7 rated repairs) ?

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Product Description

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This is an authentic manufacturer-sourced replacement component that is specially designed for use with Milwaukee sanders. It helps to provide an air-tight seal between connected parts, please make sure to refer to refer to the appropriate diagrams of your model for the correct location and application of this hardware. Keep in mind this high-quality item is made of durable rubber and is sold individually.

Frequently Purchased Together

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Troubleshooting

This part works with the following brands:
  • Milwaukee
This part works with the following products:
  • Orbital or Palm Sander
  • Sander Polisher

Customer Part Reviews

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Average Rating (out of 5):
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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.

Easy 

Less than 15 mins 

(7 rated repairs) ?
  • 1
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Sorry, we couldn't find any existing installation instruction that matched.

My random orbital sander was running full bore, no randomizing.

Cody from Lakeland, Florida

3 of 3 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers
Remove the pad. Remove the bearing/pad mounting bracket. There is a screw with a collar that hold the bearing against the drive spindle. Also use a small flat top screw driver through one of the vent holes in between the fins of the suction to keep the spindle from turning so that you can remove the hold down screw. Place the bearing plat e on two small pieces of wood with the center open, take a socket that will fit in the center hole and cover most of the exposed bearing. Using a hammer, drive the old bearing out. Insert the new bearing in the recessed location, using the hammer tap around the plate to seat the bearing flush with the mounting plate. It has to be flush or the pad won\'t align properly. The rest kind of depends on the make and model of your sander.
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Vibration, pad not holding paper

Anthony from Pacifica, California

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Screw drivers
took the tool apart, installed new parts , worked great
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Orbital Sander brake was not working

James from MADISON, Mississippi

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Screw drivers
Removed pad and side panel of body case, removed old brake and replaced. Very easy repair if you have the right size torx screwdriver. Also replaced dust bag and o-ring.
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Dust collector ate the bag from my portable sander!

Robert from Northwood, New Hampshire

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Screw drivers
Install the o-ring on the dust chute
Then put the spring in the dust bag
Attach the dust bag to the bag locking ring
Then attach it to the dust chute
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My dust bag from sander went thru dust collector and rip it threads.

bernard from madison, Wisconsin

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Screw drivers
Install bag, spring, & o-ring to locking ring.
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missing dust collector

William from GREEN BAY, Wisconsin

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
put together new bag
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Locking bag ring and dust chute were worn and wouldn\'t stay on.

William from Rochester, New York

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Pliers
Removed the dust chute, had to cut it with a saw to release it off the sander. Then its just a matter of putting the bag on the ring with the spring inside. slide the new chute on the sander.
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  • 1

Model Cross Reference

This part works with the following models:
ERP Number: ERP10126953
Manufacturer Part Number: 34-40-1870
Brand Model Number Description
Milwaukee 6020-21 Orbital or Palm Sander - 1/4 Sheet Palm Sander
Milwaukee 6021-21 Orbital or Palm Sander - 5" Random Orbit Palm Sander