HNK HGG-1000
Key Specifications
gear outside diameter
profile height
module range
helix angle
vertical working range
grinding wheel diameter
How much does the HNK HGG-1000 cost?
Price estimate
We do not have a price for the HNK HGG-1000 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-1000 is a CNC gear grinding machine for gears up to Ø1,000 mm (39.4 in) outside diameter, the smallest of the four large HGG models. HNK describes the series as a profile grinding type and thread wheel grinding type machine, covering modules M1-M35 at helix angles of ±45°.
On this size the vertical working range is 650 mm (25.6 in). That figure limits face width plus the overrun the wheel needs at each end of the tooth, and it is the main thing that separates this model from the HGG-2000, which has 1,000 mm (39.4 in). Wheel data are shared between the two: a grinding wheel of up to 400 mm (15.7 in) diameter and up to 90 mm (3.5 in) thickness, a minimum shoulder diameter of 206 mm (8.1 in), and a top wheel speed of 4,000 rpm.
HNK lists several process aids. A double dressing system is said to minimize dressing time. Automatic balancing and an AE sensor are named among the operating devices, the second being the usual means of detecting first contact between wheel and tooth. Tooth calibration devices are cited for reliable results.
The grinding spindle drive is 24 kW (32.2 hp), with 37 kW (49.6 hp) in braces. Profile height is given as a maximum of 80 with no unit printed. The control is Siemens 840D; no alternative is listed.
Full Specifications
| Parameter | Value |
|---|---|
| Gear Outside Diameter | Ø1,000 mm (39.4 in) |
| Profile Height | Max. 80 |
| Module Range | M1-M35 |
| Helix Angle | ±45° |
| Vertical Working Range | 650 mm (25.6 in) |
| Grinding Wheel Diameter | Max. 400 mm (15.7 in) |
| Grinding Wheel Diameter Shoulder | Min. 206 mm (8.1 in) |
| Grinding Wheel Thickness | Max. 90 mm (3.5 in) |
| Grinding Spindle Power | 24 kW (32.2 hp) {37 kW (49.6 hp)} |
| Wheel Speed Max | Max. 4,000 rpm |
| CNC Control | Siemens 840D |
Specifications sourced from en.hnkkorea.com — verified 2026-10-04
Strengths & Limitations
Strengths
- Modules M1-M35 on gears up to Ø1,000 mm (39.4 in)
- Wheel speed up to 4,000 rpm with a 24 kW (32.2 hp) grinding spindle
- Double dressing system, which HNK says minimizes dressing time
- Automatic balancing and AE sensor listed by the maker
Limitations
- Vertical working range of 650 mm (25.6 in) is the shortest in the series
- Only Siemens 840D is listed as the control
- No workpiece weight or table data in the published table
Best For
Frequently Asked Questions
01
Gears up to Ø1,000 mm (39.4 in) outside diameter, in modules M1-M35, with helix angles of ±45°. The vertical working range is 650 mm (25.6 in), which bounds the face width.
02
HNK describes the HGG series as a Profile Grinding Type / Thread Wheel Grinding Type of gear grinding machine. The page does not say whether both methods are available on one machine or are ordered as alternatives, so that needs to be asked.
03
A wheel of up to 400 mm (15.7 in) in diameter and up to 90 mm (3.5 in) thick, with a minimum shoulder diameter of 206 mm (8.1 in). Maximum wheel speed is 4,000 rpm.
04
The grinding spindle drive power is 24 kW (32.2 hp). HNK prints 37 kW (49.6 hp) in braces after it, without a legend; on another HNK gear machine table a braced power figure is labelled as an option.