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Bourn & Koch Adds to Gear Shaper Offering

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5200 Prairie Stone Pkwy.
Hoffman Estates, IL, 60192

Press release date: August 19, 2014

HOFFMAN ESTATES, IL. — The Bourn Koch Fellows HS2550-600 CNC Hydrostroke™ Gear Shaper is a true bridge type 100” gear shaper with a 0” center distance reach even when the outside diameter of the gear is 100”. A 24” (600 mm) stroke length allows long face width capability with a CNC controlled spindle for programming stroke positioning, stroke length and stroking speeds in both the down and up motion for quick return rates, and with positioning above the worktable via a vertical slide of 17” (471 mm). The six axis machine is rated for 1 DP (25 module) gear cutting. An optional feature, CNC controlled crowning and taper for internal and external gears via servo control, includes software using Bourn & Koch’s Oriented Stiffness Back-Off™.

The Bourn & Koch HDS1600-300 CNC Horizontal Double Helical and Herringbone Gear Shaper fills a void left by the Sykes herringbone gear shaper, the last produced machine being delivered ca. 1983.

The HDS1600-300 is a 9 axes CNC controlled machine, with linear direct drive stroking of both heads, direct drive workspindle, electronic index drive for synchronization of cutter and work rotation, CNC helix control, CNC linear backoff for independent control of the backoff amount of each cutter (which allows for crowning, tapering and tool depth matching). The HDS1600-300 reduces traditional mechanical herringbone shaper setup and cutting times significantly while offering a verifiable consistent quality improvement to AGMA 10 or better. The machine is rated for 2 DP (12.7 module) gears, up to 40 helix angle, 60” diameter and is arranged for pinions and bullgears with minimal changeover required. Multiple machines are already in production at manufacturers of gearboxes in the artificial lift industry.

The HDS1600-300, when combined with Star SU’s Star PTG1 Tool & Cutter Resharpening Machine for consistent grinding of accurate Sykes style shaper cutter relief lips, further improves tool performance and accuracy of the process.

For further technical information contact:

Brian W. Cluff, Vice President, Star SU LLC
5200 Prairie Stone Parkway, Suite 100, Hoffman Estates, IL 60192
Tel. 847-649-1470, Fax 847-649-0112, email:

Timothy P. Helle, President, Bourn & Koch Inc.
2500 Kishwaukee Street, Rockford, IL 61104
Tel. 815-713-2301, Fax 815-965-0019; email:

About Star SU, LLC
Star SU, LLC offers a wide variety of machine tools, precision cutting tools and services including:
• vertical and horizontal gear hobbing machines
• chamfering and deburring machines
• gear grinding machines
• gear shaping and shaving machines
• tool grinding machines
• gear hobs and milling cutters
• gear shaper cutters and shaving tools
• chamfer and deburring tools
• gundrills
• form tools and reamers
• carbide blanks and preforms
• tool coatings
• and tool life cycle management services

Star SU is the go-to-market cooperative partnership of Star Cutter Company of Farmington Hills, MI, and SU America, Inc., the US sales and manufacturing unit to Samputensili, S.p.A. The companies together represent one of the world’s largest gear machine, tool and gear tool manufacturing producers.
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