Fellows 10-4 CNC Gear Shaper
Key Specifications
direction
stroke type
stroke range
max diameter external
max diameter internal
max swing
How much does the Fellows 10-4 CNC Gear Shaper cost?
Estimated price range
Our best estimate for a cnc gear cutting machine in this class — not a quote from Fellows Corporation. Configuration moves it a long way.
Overview
The Fellows 10-4 is a vertical CNC gear shaper with a mechanical stroke drive, sized for gears up to 254 mm in diameter, external or internal, and up to 102 mm in face width. Stroke rate runs between 50 and 1,300 strokes per minute.
Pitch capacity depends on the kind of gear. Spur gears can be cut up to 6.35 module and helical gears up to 5 module, with helix angles to 45 deg. The cutter spindle is 89 mm in diameter, and its maximum velocity is 53 m/min on spur work and 46 m/min on helical. Because both the pitch limit and the spindle velocity drop for helical gears, a job near the limit should be checked against the helical rows of the table, not the spur ones.
Workholding figures set the practical limit before the cutting figures do. The worktable is 365 mm in diameter and carries 600 lbs., which has to cover the blank and its fixture together. Maximum swing is 483 mm, well beyond the 254 mm cutting diameter, and that margin is what lets flanged parts and fixtures wider than the gear itself turn on the table.
The stroke range is wide. Its low end suits wide faces and tough materials, where each stroke is long; the high end is for narrow faces, where the stroke is short and cycle time comes down to how many strokes fit into a minute. The machine weighs 16,500 lbs., a figure to carry into rigging and floor planning, and the control row of the table names the CNC fitted.
Full Specifications
| Parameter | Value |
|---|---|
| Direction | Vertical |
| Stroke Type | Mechanical |
| Stroke Range | 50-1300 SPM |
| Max Diameter External | 254mm |
| Max Diameter Internal | 254mm |
| Max Swing | 483mm |
| Max Face Width | 102mm |
| Max Diametral Pitch Spur | 6.35 Module |
| Max Diametral Pitch Helical | 5 Module |
| Max Helix Angle | 45 deg. |
| Cutter Spindle Diameter | 89mm |
| Max Spindle Velocity Spur | 53m/min. |
| Max Spindle Velocity Helical | 46m/min. |
| Worktable Diameter | 365mm |
| Max Table Load | 600 lbs. |
| Machine Weight | 16,500 lbs. |
| CNC Control | Fanuc 0i CNC |
Specifications sourced from bourn-koch.com — verified 2026-10-03
Strengths & Limitations
Strengths
- Cuts external and internal gears up to 254 mm in diameter
- Face width capacity of 102 mm
- Mechanical stroke drive covering 50 to 1,300 strokes per minute
- Spur gears up to 6.35 module and helical gears up to 5 module, with helix angles to 45 deg.
- 483 mm maximum swing leaves clearance well beyond the 254 mm cutting diameter
Limitations
- Table load is 600 lbs., which must cover the blank and its fixture
- Helical capacity is lower than spur: 5 module against 6.35 module, and 46 m/min against 53 m/min of spindle velocity
- Gear diameter stops at 254 mm, internal or external
- At 16,500 lbs. the machine needs rigging and a floor to match
Best For
Frequently Asked Questions
01
Maximum diameter is 254 mm for both external and internal gears, with a maximum face width of 102 mm. Maximum swing is 483 mm, so a part can be larger than the gear being cut, as with a flange or hub, provided it clears that swing.
02
Up to 6.35 module on spur gears and up to 5 module on helical gears, with a maximum helix angle of 45 deg. Maximum spindle velocity follows the same pattern: 53 m/min for spur and 46 m/min for helical work.
03
The stroke range is 50 to 1,300 strokes per minute, from a mechanical stroke drive on a vertical cutter spindle of 89 mm diameter. The rate that can be used on a given job depends on face width, since a longer stroke reaches the maximum spindle velocity at fewer strokes per minute.
04
The worktable is 365 mm in diameter and is rated for 600 lbs. Add the fixture to the blank when checking a job against that figure. The machine itself weighs 16,500 lbs., which is the number needed for rigging and floor loading.
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