This Dewalt switch is a common replacement part and is compatible with the Dewalt tools listed below. This switch is a genuine Dewalt replacement part. It is a standard on/off switch and has four terminals. This switch has its four terminals located on the bottom, not the side, of the body but it is fully compatible with both configurations.
Troubleshooting
This part works with the following brands:
DeWALT
Black and Decker
Craftsman
DeVilbiss
This part works with the following products:
Circular Saw
Part# 429977-00 replaces these:
429977-00,
Videos For installing this part.
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Customer Part Reviews
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4.8
Average Rating (out of 5):
★★★★★
★★★★★
(11 Reviews)
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★★★★★
★★★★★
Easy Repair
Repaired Quickly. Works Good.
Guest - July 4, 2019
Verified Purchase
★★★★★
★★★★★
Fits OLD Black and Decker U337!!
I have an old Black and Decker U337 saw my father-in-law picked up for me at a garage sale. It worked well, except the switch was intermittent. Took it apart and found the contacts nearly eroded away. Searching for a switch for this saw kept pointing me to this DeWalt part. I was skeptical, but as time wore on, I saw I was never going to get to "rebuilding that switch." I decided to buy one of these, as the mounting and size looked correct (thanks for the great part pictures, by the way!!). Turns out it was a perfect fit. I had to wire it differently as this saw doesn't even know what a blade brake is, and I added a little heat shrink to the wire terminals since they had a lot of exposed conductor and the new wiring had them much closer to the case and to each other. But the switch bolted right to the saw, fits perfectly, and works. No more saw stopping in the middle of a cut, or having to double-click to get it to start!
Guest - July 8, 2019
Verified Purchase
★★★★★
★★★★★
Right Replacement, perfect fit.
This was the perfect replacement part for my dewalt circular saw. I've bought several parts in the past with this company hands down my go to parts store. Great price and fast shipping. I highly recommend doing business with them.
Guest - November 4, 2019
Verified Purchase
★★★★★
★★★★★
I was ‘triggered’
Saved me from having to buy a new saw, the only negative was the new wiring diagram since the shortest wire has to go the farthest distance to attach to the proper terminal. Might want to research that guys.
Guest - November 23, 2019
Verified Purchase
★★★★★
★★★★★
Switch
Good condition. Easy to install.
Guest - June 13, 2020
Verified Purchase
★★★★★
★★★★★
Good service
Right fit, thanks. Delivery slow, but all is good. Thanks
Guest - December 14, 2020
Verified Purchase
★★★★★
★★★★★
good part, very fast delivery.
the part showed up quickly and worked as it was supposed to. very happy to have found this company.
Guest - January 7, 2022
Verified Purchase
★★★★★
★★★★★
ease repair and good service !!!!!
work as it should and received quickly in good shape !!!
Would buy from again !!!!
Guest - April 26, 2022
Verified Purchase
★★★★★
★★★★★
Easy Repair.
Fast ship. Directions included.
Guest - July 27, 2022
Verified Purchase
★★★★★
★★★★★
Part arrives very quick
Part arrives quickly. I appreciate that. Thank you so much.
Guest - May 5, 2023
Verified Purchase
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Questions & Answers
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Removed old switch noting wire placement. On the new part, the wire terminals were at opposite ends for 2 of the wires from original switch, so 1 wire was barely long enough to reach terminal and the other was longer than needed. Directions with switch warned of possible difference in terminal positions, so all went smoothly on installati
... Read moreon. Saw operates properly and safely once again.
Removed one handle half, removed the switch and the cord clamp. Disconnected the wires from the switch. You may want to make a wiring diagram first. I then slid the cord protector from the old cord and slid it on the new cord. I connected all of the wires to the switch, attached the switch to the handle, put the cord clamp back on, then p
... Read moreut the handle half back on.
Remove handle half, remove cord clamp. You may want to make a wiring diagram of the switch wires. Remove old switch disconnect wires. Then install them on the new switch. Assemble tool in reverse order.
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Power trigger inop, needed new brushes and handle cracked.
Remove the half cover on circular saw, (5 screws).
Remove switch from inside of handle.
Change wires (4) from old switch to new one.
Reinstalled handle cover and tested.
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Circular saw switch started sticking when going off (4 years ago), then wouldn\'t turn off, to momentarily on/ff, to not on al all (all follwing each other in 1 hour)
1. Removed the saw body half (torx screws)
2. Remove old switch (one torx screw)
3. Install new switch. (New switch has different terminal orientations, but using same wires)
4. Reassemble saw body halves.
installed new switch. Make sure to look at new wiring instructions as the new switch was sl different from the old switch and the wiring arrangement was sl different.
This part is in stock in our warehouse and will ship out within 1 business day of the order being placed.
New stock is on the way! On order parts usually ship within 7 business days.
Item is not in stock and usually ships 10-15 business days from the time you place your order.
This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.
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Mail-In Recycling Rebate
Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.
