Easy
Less than 15 minutes
This is a Genuine OEM Sourced replacement part used on Delta Power Equipment. This switch has a Plastic Body. Switches are a commonly replaced part in power tools, handling on/off operations. Because switches use mechanical internals, they will degrade and wear out over time, eventually requiring replacement. Please note the Switch Box and the Cover are Sold Separately.
To replace this switch you would need a Screwdriver.
• First make sure the tools is not plugged in
• Then you want to remove Screws used to hold two pieces of Housing Set together
• Disconnect Wires from the old Switch and remove it from the Housing
• Place the new Switch in the Housing and connect Wires to it
• Reassembly the Housing
Push-button Switch 904121
OEM part for: Delta
Part Number: 904121
$41.51
In Stock
Order within the next 6 hours and your part ships today! 
Product Description ?
- 4 Contact Switch
- Classification: Part
- Weight: 0.01 lbs.
- Shipping: Ships Worldwide
Compatibility
This part will fit the following 7 machines
Delta
BS150LS Type 1 Band Saw View Diagrams & Manuals
14-651 Type 1 Mortiser View Diagrams & Manuals
DP350 12" Variable-Speed Bench Drill Press View Diagrams & Manuals
DP250 Type 1 Drill Press View Diagrams & Manuals
14-651 Type 2 Mortising Machine View Diagrams & Manuals
DP350 Type 1 12" Variable-Speed Bench Drill Press View Diagrams & Manuals
14-651 Type 3 1/2 HP Bench Mortiser View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Band Saw Parts
- Saw Parts
- Drill Parts
- Drill Press Parts
Customer Part Reviews ?
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Easy repair
The part came within a few days. Fit perfectly.
Guest -
March 20, 2024
Verified Purchase
Excellent service
My replacement part was shipped out the same day I ordered.
Guest -
August 18, 2023
Verified Purchase
Start Your Engins
The switch arrived in time, it's exactly what I ordered. A simple instalation an I'm drilling holes.
Guest -
February 22, 2023
Verified Purchase
Easy repair
It was easy to change out and works great.
Guest -
November 23, 2022
Verified Purchase
FAST
No problems, fast service and the correct thing!!
Guest -
November 12, 2022
Verified Purchase
the switch was an exact replica
perfect fit and function
Guest -
April 21, 2021
Verified Purchase
switch
NO problem ordering and getting this switch
Guest -
June 8, 2022
Verified Purchase
t
t
t -
t days ago
Verified Purchase
eReplacementParts Team
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Questions & Answers ?
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We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
Does this fit my product?Questions & Answers for Push-button Switch
My mortiser is a Type 2. The switch that I ordered indicated the part 903121 was comparable with Type & 2 machines. The email for my order number 18764675 indicates a Type 3 switch is being sent and it fits Type 3 machines. Will it Fit a Type 2 machine?
Dennis
for model number 14-651
asked on 2022-11-23
Hello Dennis, Thank you for contacting us. We have researched the model you have provided and have found the part you are looking for is Part Number: 904121 and used on more then one type. Thank you for your inquiry, good luck with this repair!
eReplacementParts Team November 23, 2022
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.
Push button switch was no good on bandsaw so needed replaced.
David - January 11, 2024
Tool Type
Band Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, No other tools needed.
Parts Used
Removed 3 screws holding switch in place, pulled switch out so the wires were exposed. Pulled the wires off and transferred them onto the new switch. Pushed wires back inside and replaced the 3 screws to hold switch in place.
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Failed start / stop switch.
JAMES - August 12, 2023
Tool Type
Drill Press
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers
Parts Used
1. Took phone photo of how wires were connected. Just in case memory failed or confused.
2. Removed wire connectors and crimped rolled edges for solid contact.
3. Threaded wires thru mounting bracket before mounting cover plate.
4. Screwed assembly to front of drill press.
5. Tested proper function....okay.
2. Removed wire connectors and crimped rolled edges for solid contact.
3. Threaded wires thru mounting bracket before mounting cover plate.
4. Screwed assembly to front of drill press.
5. Tested proper function....okay.
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The button would not start the machine
Michael - May 8, 2022
Tool Type
Drill Press
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Removed switch, pulled the wires from the broken switch, pulled broken switch from housing, put new switch into housing, connected wires to new switch, placed switch and housing on the drill press.
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On off switch failure
Don - July 17, 2021
Tool Type
Drill
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Removed old switch and replaced with a direct replacement.
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Switch stopped working, collar broke tightening it.
Thomas - March 4, 2021
Tool Type
Drill Press
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Power Drill, Wrench Set
Parts Used
Unplug drill press. Remove switch screws. Remove wires from old switch. Press switch out of face plate and replace with new switch. Replace wires exactly as they were removed and screw switch plate back on to machine.
For the collar, tighten the shaft retaining screw on the right side so you are unable to lower chuck, then remove two bolts from chrome spring housing. Gently remove housing from bolt. Remove the two screws holding the depth gauge and the gauge itself from the collar. Remove spindle arm assembly from case. Holding the chuck, loosen the shaft retaining screw and lower the entire shaft from the case. Loosen the collar retaining allen and the collar tightening bolt in front. Slide collar off of the shaft and replace with new collar. Reverse order to reassemble.
For the collar, tighten the shaft retaining screw on the right side so you are unable to lower chuck, then remove two bolts from chrome spring housing. Gently remove housing from bolt. Remove the two screws holding the depth gauge and the gauge itself from the collar. Remove spindle arm assembly from case. Holding the chuck, loosen the shaft retaining screw and lower the entire shaft from the case. Loosen the collar retaining allen and the collar tightening bolt in front. Slide collar off of the shaft and replace with new collar. Reverse order to reassemble.
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Switch became non functional/quit
james - March 18, 2017
Tool Type
Drill Press
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Parts Used
Removed the old push button switch and installed the new one. Easy. When I removed the old switch, I drew a diagram to indicate the wiring sequence.
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Defective power switch
Melvin - March 2, 2017
Tool Type
Drill Press
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Very easy repair. Remove switch housing from drill press, snap old switch out of housing, snap new switch into housing, then reattach wires to the same pins. Reattach housing to front of machine and done.
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dedicated mortiser would not run
David - January 31, 2017
Tool Type
Drill Press
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, voltage tester
Parts Used
1. Checked wiring for power
2. Disconnected power source
3. Removed old push-button switch
4. Installed new push-button switch
5. Replaced cover and re-connected power source
2. Disconnected power source
3. Removed old push-button switch
4. Installed new push-button switch
5. Replaced cover and re-connected power source
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The switch failed to turn on, on the drill press.
Ralph - January 8, 2017
Tool Type
Drill Press
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
1. Removed three screws securing switch faceplate.
2. Pulled off four wire sta-kons to switch
3. Popped old switch out of faceplate.
4. Inserted and snapped in new switch to faceplate.
5. Matched wire colors, top to bottom, then left to right.
6. Reattached faceplate with four screws.
7. Tested.
2. Pulled off four wire sta-kons to switch
3. Popped old switch out of faceplate.
4. Inserted and snapped in new switch to faceplate.
5. Matched wire colors, top to bottom, then left to right.
6. Reattached faceplate with four screws.
7. Tested.
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Power button not working
Jason - December 8, 2016
Tool Type
Drill Press
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Unplugged the drill press
Remove the 3 screws from the switch plate
Remove the switch from the switch plate
Exchange the leads from the old switch to the new one
Put it back together in reverse order
Remove the 3 screws from the switch plate
Remove the switch from the switch plate
Exchange the leads from the old switch to the new one
Put it back together in reverse order
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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
