CNC Spoilboard Surfacing Router Bit, 1/4" Shank 1-1/4" Cutting Diameter, Carbide Insert Slab Flattening Router Bits Planing Bit
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Availability:
Only 5 left in stock, order soon!
Arrives
Saturday, Oct 24
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Pattern Name: Surfacing Bit
Size: 1/4" Shank-1-1/4" Cut Dia. (2 Inserts)
Features
- INDUSTRIAL GRADE CNC WOOD ROUTER BIT: Super-strength steel body with anti kickback design, 2 cutting blades.
- COST-EFFECTIVE INSERT BIT: The surfacing router bit utilizes 4-sided solid carbide inserts. All 4 edges of carbide inserts can be used, use a screwdriver to make other blade edge outside. Replace the carbide inserts when needed, instead of replacing the whole bit. Cost effective solution compared to brazed router bits and solid carbide spiral bits.
- This planer router bit is perfect for wood slabs flattening, resurface or plane the top surface of the spoilboard. Used on soft and hard woods, particle board, MDF, plywood compact panel, laminate, acrylic and etc.
- Use on CNC and other automatic routers as well as hand-held and table-mounted portable routers. Such as woodworking engraving machine, trimming machine, etc.
Description
The surfacing router bit utilizes 4-sided solid carbide inserts. All 4 edges of carbide inserts can be used, use a screwdriver to make other blade edge outside. Replace the carbide inserts when needed, instead of replacing the whole bit. Cost effective solution compared to brazed router bits and solid carbide spiral bits.
Size: 1/4" Shank-1-1/4" Cut Dia. (2 Inserts)
Material: Alloy Steel, Carbide
Brand: BINSTAK
Cutting Length: 1.25 inches
Item Weight: 0.09 kg
Size Name: 1/4" Shank-1-1/4" Cut Dia. (2 Inserts)
Cutting Length: 1.25 inches
Item Weight: 0.09 kg
Cutting Diameter: 1.25 inches
Item Diameter: 1.25 inches
Cut Type: Straight Cut
Number of Flutes: 2
Material Type: Alloy Steel, Carbide
Brand Name: BINSTAK
Number of Items: 1
Unit Count: 1 Count
Included Components: Wrench, Screws
Manufacturer: BINSTAK
Model: BK220518
Part Number: BK220518
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Oct 24
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Pattern Name: Surfacing Bit
Size: 1/4" Shank-1" Cut Dia. (2 Inserts)
Works great for me! I only take 1mm passes, but I can do it at 300 ipm so I love it! I use it to do most of my initial milling because my jointer for up my chip barrel so quickly it makes everything take longer, so my cnc make small chips that take longer to fill instead of the big chips my spiral head joint leaves. So I use this bit A LOT! Mine is fast, balanced, and sharp, it also leaves a smooth finish. I wish I found it much earlier. I have an altmill with a spindle so idk if that makes a difference, but it's great!
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Reviewed in the United States on September 10, 2026 by Bigmitch in md
Pattern Name: Surfacing Bit
Size: 1/2" Shank-2" Cut Dia. (3 Inserts)
As someone just getting into some wood working it can be overwhelming to think about the different tools and equipment you need to do things. I can't buy rough milled lumber and save money because I don't gave a planer. A good piece of advice is buy things like router bits as you need them and don't get the cheapest thing. This surfacing bit is large enough to cut down on time, well made to do a pretty clean job, and thoughtful enough to be able to rotate the cutting blades for extended life. My first few times using this have been excellent. It cuts clean, smooth and flat lines allowing me to get the job done that a planer and joiner could do. Yes, those other tools would be faster but since I already have a router, a simple sled allowed me to get 2 flat surfaces that needed nothing more than finish sanding. I've used this to reduce thickness of boards and take out some errant marks made from milling. Extra screws are nice especially because they're likely a specific size to hold the cutting blades. The 1/2" shank keeps everything secure and tends to heat up less than 1/4" This should be good for all wood types and I'm sure it will work for soft metals like aluminum or brass without destroying the blades. I am very happy with the purchase.
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Reviewed in the United States on August 1, 2026 by M
Pattern Name: Surfacing Bit
Size: 1/2" Shank-2" Cut Dia. (3 Inserts)
Bought the 1/2" shank 2" diam. 3 tooth bit (just because it seemed most reviews were of that one). Needed to flatten out a walnut end grain cutting board with a handheld router (Bosch 1617) and a janky router sled. Process: Made sure the sled was not warped at all, and was clamped securely. Shimmed the material to be flattened to be level as possible, and then shimmed it securely to the sleds perimiter (no wobbling, no sliding). Recommended speed for a 2" bit seems to be 12-16,000RPM, so I started it out at setting 2 (13,500), taking it slowly, removing only about 1/16". It really dragged, and the surface was fairly torn up. Bumped it up a couple times between the sides, and ended up getting best results at 4 (20,000 rpm), a bit higher than top recommendations, still keeping the cuts very shallow. The sled ended up being stable, and the bit worked fairly well. Note: I overlapped my sweeps by 3/4" inch or so. Doing it again, I think getting one with cutters on the top (bottom) as well as might be a better option, especially considering the additional cost is negligible. Or, maybe that 6 cutter head one would be better. If I had one of those woodworking channels, I'd do that comparison. As others have mentioned, I would have liked an additional 1/4" of shank. All in all, results were fair. Worth it for the amount of times I will use it. I would upgrade to one of the above mentioned bits if I were to continue to use a router sled for more than a few projects over time (and I would get something with rails and a dust collection system if I were doing larger projects).
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Reviewed in the United States on September 10, 2026 by bob
Pattern Name: Surfacing Bit
Size: 1/2" Shank-2" Cut Dia. (6 Inserts)
I just got this today so I obviously can't speak for the longevity of this item yet. Also I don't write a lot of reviews and usually only when really good or really bad. This thing is fantastic. I got the 1/2 inch shaft 2 inch diameter 6 blade. Using it to level epoxy / wood pours for shelves. I have been using a 2 blade and it started gouging. I will check back in after a couple of pours.
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Reviewed in the United States on September 20, 2026 by C
Pattern Name: Surfacing Bit
Size: 1/2" Shank-2" Cut Dia. (6 Inserts)
Works really Great. I surface planed (8) 3' x 5' panels made from Douglas fir with no issues. I purchased this one because of the extra metal supporting each cutter. Ran the bit at 14500 rpm with no oscillation. None of the carbide inserts came loose and they show very little signs of wear. One of the things that would have made this even better is if they added a few extra carbide inserts just encase one was damaged or came off; to go along with the screws that were included.
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Reviewed in the United States on July 2, 2026 by KEITH M HALL
Pattern Name: Surfacing Bit
Size: 1/2" Shank-2-1/2" Cut Dia. (6 Inserts)
I was pleasantly surprised how well this tool worked. At this price point I was concerned that the tool wouldn’t be balanced well and would have to run at low RPMs. Knives were sharp and it performed great. In the video- 1200 RPM @100 inches per minute
Reviewed in the United States on August 30, 2026 by Tim
Pattern Name: Surfacing Bit
Size: 1/2" Shank-3" Cut Dia. (2+2 Inserts)
Built a gian 22x22x6" chopping block made of white oak, and needed a way to flatten it. It was too tall for my CNC, so I used a router sled and this chonk of a flattening bit. Having flattened on a CNC with a wee 1/2" bit, I started this taking a tiny amount and overlapping by half. After a few minutes, I noticed I was getting dust, not chips. Rather than size the board in tiny steps, I lowered the bit a couple of mm to try again. I was paying attention to make sure the router didn't get bogged down, the board didn't move, and that my lines looked clean. This thing just CHEWED through the endgrain and left me with a super flat surface with no burnout whatsoever. Sanding from this point was so easy with such a smooth surface. If you're on the fence, get off the fence and buy the thing. It's a chonk, seems like it's a great quality, and the price is right as well.
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Reviewed in the United States on April 24, 2026 by Mike Pittman
Pattern Name: Surfacing Bit
Size: 1/2" Shank-2" Cut Dia. (6 Inserts)
Used this on several white oak slabs, very happy with the performance. For the price point it's a solid purchase.
Reviewed in the United States on August 30, 2026 by Mark Manning