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23YEARS
SKU: 85-119

Infinity Tools Compression Spiral Router Bits

Regular price $44.90

Shank
Cutter Diameter
Cutter Height

Spiral Compression Bits for an Ultimate Clean Cut

A Compression bit is a spiral bit that combines up cut and down cut action into one bit. The cutting tip pulls the fibers and chips up towards the center of the workpiece. The rest of the bit is cutting and pushing wood fibers down, also towards the center of the workpiece. Compression bits are definitely the way to go for getting clean top and bottom surfaces of your cut when used correctly!

Our solid carbide spiral router bits are designed to provide remarkable performance and durability. They quickly slice through hard or soft wood, plywood and composites such as MDF or particleboard. Manufactured using state-of-the-art computer-controlled machinery; these micro-grain carbide cutters feature our optimal helix design and a stronger body that reduces vibration and lasts up to 300% longer than regular router bits. Unlike straight router bits, Infinity solid carbide spiral bits feature a helical spiral design that is continuously in contact with the workpiece, producing smoother cutting action and the cleanest results possible.

We offer both a 1/4" and 1/2" shank option to best meet your routing needs.

Please Note: The recommended depth of cut for any single pass is 1/2 of the diameter of the tool. For example, if you are using a 1/4" diameter cutter you should only take a 1/8" depth of cut for any single pass. When used in a router table upcut bits actually pull your material down.

Please Note: Solid Carbide Router Bits are not eligible for product returns as user error that leads to breakages is not a variable we can control.


Solid Carbide Spiral Compresion Router Bits

Compression spiral router bits provide excellent performance on tricky and complicated grain patterns, both cutting up and down to leave the cleanest possible finished surface. Excellent for plywood, figured hard and soft woods and manufactured materials.


Our 85-919, 1/2
Our 85-919, 1/2" Diamater (left) and 85-119, 1/4" Diameter Spiral Compression Bits
Traditional upcut and downcut spiral router bits.
Traditional upcut and downcut spiral router bits.

Many woodworkers are familiar with upcut and downcut spiral router bits, providing pressure either up, or down, to protect from tearout on delicate (veneered) surfaces as our most common in today's veneered plywood material. This works well if you're only worried about the top or bottom surface of your material. But if both surfaces will be visible, how to protect both? 

A Spiral Compression router bit has flutes applying pressure towards the middle of the bit, protecting both top and bottom surfaces.
A Spiral Compression router bit has flutes applying pressure towards the middle of the bit, protecting both top and bottom surfaces.

A compression bit is a spiral router bit that combines up cut and down cut action in one bit. The cutting tip pulls the fibers and chips up towards the center of the workpiece. The rest of the bit is cutting and pushing wood fibers down, also towards the center of the workpiece. Compression bits are definitely the way to go for getting clean top and bottom surfaces of your cut when used correctly!

Spiral Compression Bits also provide an excellent edge cut in tricky materials.
Spiral Compression Bits also provide an excellent edge cut in tricky materials.

Our solid carbide spiral compression router bits are designed to provide remarkable performance and durability. They quickly slice through hard or soft wood, plywood and composites such as MDF or particleboard. Manufactured using state-of-the-art computer-controlled machinery; these micro-grain carbide cutters feature our optimal helix design and a stronger body that reduces vibration and lasts up to 300% longer than regular router bits. Unlike straight router bits, Infinity solid carbide spiral bits feature a helical spiral design that is continuously in contact with the workpiece, producing smoother cutting action and the cleanest results possible. They are available in both 1/4" and 1/2" shanks to best fit your needs. 

A perfectly cut edge leads to a perfect joint!
A perfectly cut edge leads to a perfect joint!

When adding a solid edge to a veneered plywood board, it's tough to get a clean edge with no tear-out. A solid carbide compression bit makes for a perfect edge without the need of any further edge or surface preparation. 

Our 85-919, 1/2

Our Solid Carbide Spiral Compression Router Bits aren't only for edges. They'll do a great job protecting veneered surfaces in plunge cuts and many other applications. 


The Infinity Cutting Tools Difference

Black geometric logo with stylized letters in a square shape on a white background

Frequently Asked Questions

What is a compression spiral router bit?

It is a spiral bit that combines up-cut and down-cut action in one tool. The tip pulls fibers up toward the center while the rest of the bit pushes them down, producing clean top and bottom surfaces.

What shank sizes are available?

These bits are offered in both 1/4" and 1/2" shank options to best meet your routing needs, with cutter diameters of 1/4", 3/8", and 1/2".

What materials can these bits cut?

They quickly slice through hard or soft wood, plywood, and composites such as MDF or particleboard, making them versatile for many projects.

What is the recommended depth of cut per pass?

The recommended depth of cut for any single pass is half the diameter of the tool. For example, a 1/4" diameter cutter should take no more than a 1/8" depth of cut per pass.

How much longer do these bits last than regular ones?

Thanks to the optimal helix design and stronger body that reduces vibration, these micro-grain carbide cutters last up to 300% longer than regular router bits.

Why does a spiral bit cut more cleanly than a straight bit?

The helical spiral design stays continuously in contact with the workpiece, producing smoother cutting action and cleaner results than a straight bit that contacts intermittently.

Can these bits be returned?

No. Solid carbide router bits are not eligible for returns, because user error that leads to breakage is not a variable that can be controlled.

Do upcut bits affect the workpiece in a router table?

Yes. When used in a router table, upcut bits actually pull your material down against the table, which can help hold the workpiece during the cut.

What cutter heights are offered?

Cutter heights of 1", 1-1/8", and 1-5/8" are available, with overall lengths of 2-1/2", 3", and 4". Choose the size that fits your stock and shank.

What other bits pair well with compression spiral bits?

Pair them with straight router bits for grooves and dadoes, and browse the full carbide router bits range.