HNK HGG-260
Key Specifications
gear outside diameter
module range
helix angle
vertical working range
grinding wheel diameter
grinding wheel thickness
How much does the HNK HGG-260 cost?
Price estimate
We do not have a price for the HNK HGG-260 that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.
Overview
The HNK HGG-260 is a CNC gear grinding machine for automobile parts, as HNK's one-line description puts it. It grinds gears up to Ø260 mm (10.2 in) outside diameter in modules M0.5-M5, with helix angles of ±45° and a vertical working range of 180 mm (7.1 in).
Those figures cover passenger-car and light-truck transmission gears, final-drive pinions and e-axle gears. The wheel is small and fast by the standards of HNK's large HGG machines: up to 275 mm (10.8 in) in diameter, 125/160 mm (4.9/6.3 in) thick, at a wheel speed of 5,500 rpm. A wheel that wide in relation to the gear suggests a threaded wheel working across the face, although the page does not name the grinding method for this model.
Grinding spindle drive power is 12 kW (16.1 hp), with 36 kW (48.3 hp) in braces, and the control is Siemens 840D. HNK publishes no cycle time, loading system or dresser data here, all of which decide whether a machine suits volume production, so those have to be requested.
Full Specifications
| Parameter | Value |
|---|---|
| Gear Outside Diameter | Ø260 mm (10.2 in) |
| Module Range | M0.5-M5 |
| Helix Angle | ±45° |
| Vertical Working Range | 180 mm (7.1 in) |
| Grinding Wheel Diameter | Max. 275 mm (10.8 in) |
| Grinding Wheel Thickness | 125/160 mm (4.9/6.3 in) |
| Grinding Spindle Power | 12 kW (16.1 hp) {36 kW (48.3 hp)} |
| Wheel Speed Max | 5,500 rpm |
| CNC Control | Siemens 840D |
Specifications sourced from en.hnkkorea.com — verified 2026-10-04
Strengths & Limitations
Strengths
- Wheel speed of 5,500 rpm, the highest of HNK's gear grinders
- Modules M0.5-M5 on gears up to Ø260 mm (10.2 in)
- Wheel thickness of 125/160 mm (4.9/6.3 in)
Limitations
- Vertical working range of 180 mm (7.1 in)
- Gear outside diameter stops at Ø260 mm (10.2 in), so larger gears go to the HGG-550
- No automation, dressing or cycle-time data on the maker's page
Best For
Frequently Asked Questions
01
HNK lists it under gear machines for automobile parts. The table gives a gear outside diameter up to Ø260 mm (10.2 in), modules M0.5-M5, a helix angle of ±45° and a vertical working range of 180 mm (7.1 in).
02
The HGG-550 takes gears up to Ø550 mm (21.7 in) in modules M0.8-M10 with a 300 mm (11.8 in) vertical range and a wheel speed of 5,000 rpm. The HGG-260 is the smaller, faster machine at 5,500 rpm. Both list 12 kW (16.1 hp) with 36 kW (48.3 hp) in braces.
03
Siemens 840D, the control listed for every HNK gear grinding and hobbing machine. No second control appears in the table for this model.
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