cnc fly cutter
14 July 2015
14 July 2015,

When you need precision you need a fly cutter. It’s hard to beat the superior finish you get from use of a fly cutter. As far back as 1884, fly cutters were recognized as an invaluable tool in the machine shop.   While some CNC machinists use face mills; fly cutter setexperienced machinists know that the secret weapon to for the finest aluminum finishing is a fly cutter with a diamond insert. It’s the first choice for to achieve a mirror finish.

Fly Cutters for One Pass Finishes

The finest finish over a large surface is going to be made with one pass. That is what makes a fly cutter superior to a face mill.  As a matter of fact, Ingersoll Rand recommends that their face mills be operated as fly cutters if the finest finish is necessary. They actually tell you how to modify their face mill. So the obvious question to ask is why should you try to make a face mill act like a fly cutter when a fly cutter is the proper tool? You shouldn’t! If you want to end right, you need to start right.

Fly Cutter Usage

Finishing is just the start of using a fly cutter. Fly cutters are the perfect tool for small fly cutterscutting an involute on a gear tooth or cutting clearance notches in pistons. When you need to make circular cuts and notches in metal, the fly cutter is the obvious choice. Fly cutters are only limited by your imagination. If you need to mill an odd shape, you need a fly cutter.

Why Choose Sierra American Fly Cutters

No matter the speed you run, the Sierra American fly cutter will perform to perfection.

These fly cutters are proudly made in the USA.

Balance and Stability. Sierra American fly cutters are balanced to operate at high RPMs as well as lower RPMs. This proper balance also works to extend the life of the tool, so you can expect a longer operating life. Since they are made with larger alloy set screws, the blade is also much more stable.

Size Matters. When it comes to fly cutters, size does matter. Sierra American fly cutters use the larger ½” and 3/8” bits, and this saves you milling time. In any CNC shop, time is money. In addition, 3 size fly cutters are available:

  • 1 ½” diameter
  • 2” diameter
  • 2 1/2” diameter

Sierra American fly cutters are backed by a 5 year warranty. So you know they are made to stand up to the toughest shop conditions.

Don’t settle for an inferior fly cutter. Be sure to ask for Sierra American fly cutters by name. Call (800) 576-5331 to find a distributor near you.


3 responses on “Fly Cutters for Precision

  1. […] home machinist, nothing can strike fear in the heart like a slitting saw, unless perhaps it is the fly cutter. But there is no reason to fear, especially if you select the right slitting saw arbor and follow a […]

  2. […] a previous blog post on Fly Cutters for Precision we mentioned that “the finest aluminum finishing is a fly cutter with a diamond insert”. If […]

  3. […] one of their tool blog posts, a fly cutter manufacturer says “the finest aluminum finishing is a fly cutter with a diamond […]

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