Downcut Spiral Bits For Plywood Dado Cuts

Item #
00-855G
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Starting at $30.90

is available on qualifying orders with a total value of $150 or more. Learn more
Make perfect fitting dado cuts in 1/4", 1/2", and 3/4" thick plywood with our specially designed solid carbide router bits! Give you the smoothest cuts for accurate plywood joinery. See below for money-saving sets.
Grouped product items test
Item # Product Name
Shank
Cutter Diam.
Cutter Height
Spiral
O.A.L.
Notes
Price
Qty
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00-855 2-Pc. Downcut Spiral Set For Plywood Dado Cuts
IN STOCK
Includes:
85-108
85-910
Special Price $89.90 Regular Price $100.80
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00-856 3-Pc. Downcut Spiral Set For Plywood Dado Cuts
IN STOCK
Includes:
85-108
85-910
85-918
Special Price $149.90 Regular Price $164.70
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85-108 Downcut Spiral Router Bit
IN STOCK
1/4" 6mm (15/64") 3/4" Downcut 2-1/2" For 1/4" plywood joinery
$30.90
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85-910 Downcut Spiral Router Bit
IN STOCK
1/2" 12mm (31/64") 3/4" Downcut 3" For 1/2" plywood joinery
$69.90
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85-918 Downcut Spiral Router Bit
IN STOCK
1/2" 18mm (23/32") 3/4" Downcut 2.5" For 3/4" plywood joinery
$63.90
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In stock

Modern plywood is almost always made in metric thicknesses that are slightly thinner than the Imperial sized router bits most companies offer. This creates a problem for many woodworkers when trying to create tight-fitting dadoes and grooves. To eliminate this problem we offer solid carbide downcut Spiral router bits in 6mm (~¼"), 12mm (~½"), and now 18mm (~¾"). These bits produce the correct size groove for plywood and the downcut geometry produces a clean, splinter-free cut even in the most delicate or expensive veneers. Working in solid wood or other types of man-made sheet goods like MDF? These solid carbide cutters are ready to handle the most demanding jobs and will outlast traditional braised cutters. The Infinity exclusive 18mm Downcut Spiral Router Bit 85-918 features a ½" steel shank with solid carbide cutting head for the ultimate in precision and durability. Available in two money-saving packages. Chooses 00-855 for a 2-Pc. 6mm and 12mm set, or 00-856 and get all three.

Product Questions

Your current catalogue shows metric dado bits 85-108 & 85-910 for 1/4" & 1/2 " plywood. In a previous catalogue there also was one for 3/4" plywood. Has this been discontinued? I want to rout dados for 3/4" shelves in a bookcase.
Question by: Allan Kraybill on Apr 21, 2020, 9:50 PM
we do offer router bits for 3/4" undersized plywood, just not in solid carbide. https://www.infinitytools.com/straight-router-bits-20438
Answer by: customer service on Apr 22, 2020, 8:48 AM
What is the max or recommended rpm for the 3/4 router bit?
Question by: Jon R on Mar 7, 2023, 6:02 PM
We recommend 24,000 for a 3/4" diameter bit.
Answer by: Chris - Customer Service (Admin) on Mar 14, 2023, 2:16 PM
Do you have or can you get a 3/4" cutting dia w/1'2 shaft, either up spiral or down spiral router bit?
Question by: John B on Oct 30, 2018, 7:27 PM
Unfortunately No, typically solid carbide router bits will not have a cutting diameter larger than the shank due to the way they are manufactured. There are always exceptions but none that would fit your needs that I am aware of.
Now we do have the dimensions you need in a straight bit and they would have a downshear angle to the cutter.
https://www.infinitytools.com/straight-router-bits-18838
Answer by: Customer Service on Oct 31, 2018, 11:26 AM
Hi- I need to make 1/2” deep dados in 1” pvc trim. These dados will receive a 1” piece of pvc trim. This is for molding on an exterior porch.
I assumed I would make a template to run the edge of my plunge router base along to follow curves.
I have looked through your products and can’t seem to nail this down. Your suggestions please.
Thanks
Question by: Steve Grover on Mar 31, 2020, 7:58 PM
We would need a little more info to be able to offer some advice. Please feel free to email us at customerservice@infinitytools.com and we will be happy to help if we can.
Answer by: Customer Service on Apr 1, 2020, 10:58 AM

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