Double-Edge Boring

Production Tooling Bars & Cutters

Starts with a high-grade alloy steel boring bar for long-run performance. Inside the boring bar is a hardened centering pin that keeps the boring cutter centered for repeatable, within-tolerance performances.
Operates at twice the feed of single-point tools and provides a balanced centered cut for straighter holes. The boring cutter is an adjustable, twin-edged design that allows you to meet bore tolerances and compensate for indexable insert tolerances. The adjustment screw in the cutter also prevents it from collapsing and boring undersize. The centering pin in the boring bar engages the centering notch in the cutter to keep it within the bar and centers the roughing cutter for roughing pass.
Bores in three simple steps. (1) Insert the roughing cutter and rough bore the part to establish the bore centerline. (2) Chamfer the hole with the chamfering cutter to guide the finishing cutter into the hole. (3) Insert the finishing cutter into the boring bar and "float"the finishing cutter through the bore. Repeatability is typically within +/- .0005.
Meets your application needs. Muskegon Tool design engineers will make a heavy-duty indexable core drill or production boring tool to meet your specific needs. Call us or click here to start saving time and money on your line.

Heavy-duty boring bars

Removes up to 20% of heavy-stock diameter.
Makes truing up holes easier by eliminating the tendency of tools to follow cored or drilled holes.
Built to your specifications. Lets discuss whether one of our standard tooling designs will deliver custom-made performance or whether it’s more cost-effective to custom design a boring bar for your specific needs. Call us or click here to discuss your application.

Heavy-duty boring bar

Straight shank boring bars are stocked to accomodate bores from 31/32" to 6 17/32" diameters. Special shank configurations are available on request.

Heavy-duty cutter

Cutter blanks are stocked in HSS and brazed carbide styles to accomodate bores from 31/32" to 6 17/32" diameters. Blanks are custom ground to the diameter and geometry required for your application.

Medium-duty boring bars & cutters

Stays true. Unique floating action compensates for machine misalignment.
Doubles production rates compared to solid reamers.
Permits in the bar adjustments in increments of .0001
Reduces tooling costs with high-speed steel or brazed tip cutters that can be ground to face shoulders and steps.
Designed to fit your application. Our engineers will show you the most effective solution from our custom or standard tooling designs. See how we can help you save time and money. Click here.

Medium-duty boring bar

Straight shank boring bars are stocked to accomodate bores from 39/64" diameter to 6 17/32" diameter. Larger sizes and special shank configurations are available on request.

Medium-duty cutter

Cutter blanks are stocked in HSS and brazed carbide styles to accomodate bores from 39/64" to 6 17/32" diameters. Blanks are custom ground to the diameter and geometry required for your application.

Light-duty bottoming bars & cutters

Works for facing blind holes and counter-boring applications.
Keeps tooling costs in line with easy-to-re-grind brazed tip and high-speed steel cutters.
Solves your cutting challenges. Ready to save manufacturing steps? Talk to Muskegon Tool design engineers about our custom-designed and standard tooling solutions. Call or click here.

Light-duty boring bar

Straight shank boring bars are stocked to accomodate bores from 25/32" diameter to 4 7/32" diameter. Larger sizes and special shank configurations are available on request.

Light-duty cutter

Cutter blanks are stocked in HSS and brazed carbide styles to accomodate bores from 25/32" to 4 7/32" diameters. Blanks are custom ground to the diameter and geometry required for your application.

Indexable Insert Boring Tools

Heavy-duty indexable core drill bits and holders

Smooths out rough boring. Ideal for use in rough boring of castings, forgings and tubing where "core shift" may be an issue.
Two effective cutting teeth. Produce straighter, rounder holes in less time than with a single point tool or indexable drill. See how we can help you save time and money. Click here
Built to your specifications. Core drill blanks are stocked to accomodate bores from 1" diameter to 4 1/4" diameter. Larger sizes are available on request.
Holders on hand and made to order. Straight shank holders are stocked to accomodate diameters up to 4 1/4". Holders are made with through coolant capability. Larger diameters, special lengths and special shank configurations are available on request.

34723

Special core drill bit and holder with Cat 50 shank.

Boring bars and indexable inserted double-edge cutters

Choose your insert grade and geometry. Cutter blanks are custom milled to accomodate the ISO standard insert of your choice.
Dual inserts. Eliminates tapers and out-of-roundness while doubling production rates over single point tools.
Adjustability. Easy on-machine adjustment significantly reduces downtime over conventional boring tools.
Flexibility. Boring bars & cutters are suited for use on horizontal or vertical CNC machining and turning centers, as well as conventional chuckers, lathes, and horizontal or vertical boring mills.

Mini-bore bars

Straight shank mini bore bars are stocked to accomodate bores from 15/16" diameter to 1 1/2" diameter.

Mini-bore cutters

Cutter blanks are stocked to accomodate bores from 15/16" diameter to 1 1/2" diameter. Blanks are custom milled to accept the insert of your choice to your specified diameter and cutting geometry.

Heavy-duty bars & cutters

Heavy-duty boring bar

Straight shank boring bars are stocked to accomodate bores from 1 15/32" diameter to 6 17/32" diameters. Special lengths and shank configurations available on request.

Heavy-duty indexable cutters

Cutter blanks are stocked to accomodate bores from 1 15/32" diameter to 6 17/32" diameter. Blanks are custom milled to accomodate the insert of your choice at the specified diameter and cutting geometry for your application.

Jumbo duty bars and cutters

Jumbo-duty boring bars

Straight shank boring bars are stocked to accomodate bores from 1 13/32" diameter to 10" diameters. Special lengths and shank configurations available on request.

Jumbo-duty indexable cutters

Cutter blanks are stocked to accomodate bores from 1 13/32" diameter to 10" diameter. Blanks are custom milled to accomodate the insert of your choice at the specified diameter and cutting geometry for your application.

Double-Edge cutters are often referred to as Madison Reamers.

The Madison Reamer was developed in Muskegon, Michigan, in a large machine shop which was having trouble machining holes to tight tolerances with no inside taper. Mr. Madison, a tool maker, wanted a tool that would finish ream rough inconsistent holes to tight tolerances with no internal taper. The tool had to straighten the rough hole and put it back on center line. Machining a truly round, straight hole with no inside taper was nearly impossible with older worn manual machines of the day. He thought of a reamer with opposing cutting edges which would maintain the hole diameter all the way through. The opposing cutting edges would eliminate tool deflection seen with single cutting edge tools. And by letting the tool float in the hole the opposing cutting edges would push the tool to the center of the hole providing a truly round straight hole. It became known as the Madison Reamer.

Mr. Madison left his employer and started the Madison Reamer Company, making his Madison floating reamer in Muskegon ,Michigan. The Madison Company was eventually sold and moved to the east coast. The remaining employees left in Muskegon formed two new companies basically making the same Madison Reamer, Muskegon Tool and VB Manufacturing. For years the three businesses were fierce competitors. Each developing additional uses and variations for boring and reaming tooling using the Madison style reamer. The Madison Reamer also eliminates the need to program for tool deflection when trying to machine straight no taper holes on CNC machines.

Eventually Madison closed, and Muskegon Tool bought VB Manufacturing leaving Muskegon Tool as the only remaining manufacture of the Madison Reamer. In addition to other types of custom cutting tools Muskegon Tool still manufactures the Madison Reamer and utilizes it in many of its tool designs. When perfectly straight, no taper, tight tolerance holes are required, the Madison Floating Reamer is still the tool of choice. It is preferred for aircraft line bored holes, deep bored holes, screw machines, valves, pumps and hydraulic cylinders.

From design to delivery – here’s how we work

Muskegon Tool identifies each tool with a part number. We can also use the laser engraver to add your logo to the tool or engrave other information on your product. For more information, contact us.

Even though we design in a high-tech environment, we never lose sight that this is a people business. So when you call Muskegon Tool, a person, not a machine, answers the telephone. We’ll connect you to an engineer that’s ready to listen to your cutting challenges. And when you e-mail or Fax us with your requests, the person receiving it will quickly get your project started.