Kapp Niles ZPI
Key Specifications
Max Workpiece ⌀
models
max root diameter
max module
max face width
swivel range of grinding head
How much does the Kapp Niles ZPI cost?
Estimated price range
Our best estimate for a cnc gear cutting machine in this class — not a quote from Kapp Niles. Configuration moves it a long way.
Overview
The KAPP NILES ZPI is a gear grinding machine for very large workpieces, offered in two sizes. The ZPI 30 takes a maximum workpiece diameter of 3,000 mm and the ZPI 40 takes 4,000 mm. KAPP NILES places it under special solutions, apart from its standard series.
A second diameter limit sits beside the first: maximum root diameter, 2,500 mm on the ZPI 30, rising to 3,000 mm on the ZPI 40. A gear has to satisfy both rows, so drawings should be checked against the root circle as well as the overall diameter. Maximum module is 45 mm on the ZPI 40. For the ZPI 30 the row reads 40 mm with 45 mm in brackets, and the table does not say what the bracketed figure requires. Face width is 1,000 mm on either size and the grinding head swivels ±35 degrees.
For scale, the KNG 12 stops at a 1,250 mm tip diameter and 35 mm module, less than half the diameter of the smaller ZPI. Gears of this size are crane loads, yet the table gives no workpiece weight, wheel size or control. Those points have to be worked through with KAPP NILES as part of the project.
Full Specifications
| Parameter | Value |
|---|---|
| Models | ZPI 30 / 40 |
| Max Workpiece Diameter | 3,000 / 4,000 mm |
| Max Root Diameter | 2,500 / 3,000 mm |
| Max Module | 40 (45) / 45 mm |
| Max Face Width | 1,000 mm |
| Swivel Range of Grinding Head | ±35 degrees |
Specifications sourced from kapp-niles.com — verified 2026-10-03
Strengths & Limitations
Strengths
- Two sizes: ZPI 30 for workpiece diameters up to 3,000 mm and ZPI 40 for up to 4,000 mm
- Maximum module of 45 mm on the ZPI 40, and 40 (45) mm on the ZPI 30
- Face width of 1,000 mm on both sizes
Limitations
- Grinding head swivel is ±35 degrees, which bounds the helix angles that can be set
- Root diameter is capped at 2,500 mm on the ZPI 30, rising to 3,000 mm on the ZPI 40, below the workpiece diameter limits
- No workpiece weight, wheel size or control is given in the table
Best For
Frequently Asked Questions
01
Size. The ZPI 30 has a maximum workpiece diameter of 3,000 mm and a maximum root diameter of 2,500 mm. On the ZPI 40 those limits are 4,000 mm and 3,000 mm. Maximum module is listed as 40 (45) mm for the smaller machine and 45 mm for the larger. Face width, 1,000 mm, and head swivel, ±35 degrees, are the same.
02
Because both apply. On the ZPI 40 the workpiece may be up to 4,000 mm across but the root circle of the toothing may not exceed 3,000 mm. A part that passes the first check can fail the second, so compare the gear data on the drawing with both rows before assuming the machine can grind it.
03
The KNG 12 is listed to a 1,250 mm tip diameter, a 1,000 mm tooth width and 0.5 - 35 mm module. The ZPI begins well above that in diameter, at 3,000 mm, has the same 1,000 mm of face width and goes to 45 mm module.
Videos
KAPP NILES
More from Kapp Niles
Other CNC Gear Cutting Machines
Klingelnberg P 40 Precision Measuring Center
Klingelnberg G 60 Bevel Gear Grinding Machine
HNK HGG-6000
Nidec Machine Tool MSS300
