ISMS - Your source for Genesee Manufacturing hollow mills and much more.

ISMS™ is an Authorized Distributor for Genesee Mfg. Adjustable Hollow Mills, Adjustable Indexable Insert Hollow Mills, Tube Deburring Tools, Special Production Tools, and Facing & Counterboring Tools.

Call ISMS Toll Free - 800-715-PART

Tooling, Workholding, Tool Holders & Accessories for Automatic Screw Machines & CNC Turning & Milling; Davenport® Parts, Attachments, Machines & Services



Genesee Manufacturing Company, Inc.


  • Hollow Mills

  • Adjustable Hollow Mills

  • Adjustable Indexable Insert Hollow Mills

  • Tube Deburring Tools

  • Facing & Counterbore Tools

  • Special Production Tooling

Genesee hollow mill

Genesee Manufacturing can help you increase productivity and cut manufacturing costs.

Genesee offers a complete line of adjustable, inserted blade hollow mills in a wide variety of styles and sizes, as well as tube deburring tools and special production tooling. 

These include our new GEN-DEX® tools, the first uniformly adjustable, positive rake, indexable insert hollow mills. We also offer the unique INDI-SQUARE Squareness Measuring Systems that rapidly indicate squareness and straightness with a minimum of effort and a maximum of accuracy.

Genesee production tools can be successfully used to machine any material - such as steel, malleable iron, aluminum, brass, bronze, cast iron and others - on just about any machine tool, old or new, from automatics to CNC machining centers.

View Genesee catalog pages or Contact ISMS for more information on Genesee tools.

Patented GEN-DEX® indexable hollow mills boost productivity and decrease set-up time.

View Genesee's catalog page for GEN-DEX Specifications.

The first uniformly adjustable, positive rake, indexable insert hollow mill enables you to hollow mill from the end of the part with multiple indexable inserts.

  • Combines standard ISO inserts in precision, match ground, uniformly adjustable insert holders for hollow milling both ferrous and non-ferrous materials.
  • Tools have ¼" range of adjustability for 1/8" to 2" diameters.
  • A unique combination of toolholder geometry and insert geometry produces constant axial and radial rake and constant clearance angles through the entire range of diameter adjustment.
  • All tools have at least three, and, in larger sizes, as many as five inserts hollow milling for maximum productivity.
  • Tools are standard with straight shanks for use with toolholders in CNC machining centers, lathes and screw machines or in conventional turning, milling or automatic screw machines.
  • All tool bodies are precision hardened and ground for years of dependable use.
  • Special tools, shanks, toolholders quoted on application.
Standard Adjustable Hollow Mills

Standard Genesee Adjustable Inserted Blade Hollow Mills are detailed in this section - both positive rake and neutral rake. The smallest hollow mills produce diameters from 0" to 1/8" and the largest, diameters from 1-7/8" to 2".

GEN-DEX® Inserts

Genesee's large selection of precision ground GEN-DEX® inserts, either with or without positive raised island chipbreakers, provide the distinct advantage of the “C” tolerance on I.C. and thickness. This feature, normally available only by special order, contributes to optimum, balanced cutting of the hollow mill. Customers who choose to use our inserts will find they are able to hold +/-.001” or better on moderate to finishing cuts, with no additional adjustment of the hollow mill required after indexing.

Contact ISMS for Genesee Manufacturing Company Tools, Hollow Mills & Inserts.
ISMS offers tooling for automatics & CNC's. We distribute Royal Products, NTK Cutting Tools, Widell Industries & dozens of other product lines. Please visit our Products page.
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Phone Toll Free:  800-715-7278

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ISMS - International Screw Machine Services, LLC
51 Eastern Steel Rd., Milford, CT 06460 - Tel: 203-874-0381 - Fax: 203-874-0382- Email:
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