Hardinge Kellenberger K8

Q: How much does the Hardinge Kellenberger K8 cost?

Our best estimate for the Hardinge Kellenberger K8 is $180,000 - $280,000. This is an estimate for a cnc grinding machines in this class, not a quote from Hardinge; configuration, tooling, automation and installation move the final price substantially. A specific price can be requested at https://machinetoolindex.com/machines/hardinge-kellenberger-k8#price; the request is passed to Hardinge or an authorised dealer.

Q: What is the grinding capacity of the Kellenberger K8?

Distance between centres is 1,000 mm (39.4 in) and centre height is 200 mm (7.9 in). The maximum workpiece diameter is listed as 200 mm (7.9 in) and the maximum workpiece weight as 100 kg (220 lb). Z travel is 1,150 mm (45.3 in) and X travel is 350 mm (13.8 in).

Q: What grinding wheel and spindle power does the K8 use?

The wheel is Ø 500 × 80 × 203.2 mm, driven by a 7.5 kW grinding spindle at a peripheral speed of 50 m/s. Internal grinding power is listed as 5.5 kW max. The table does not give an internal spindle speed, so the range of bore sizes depends on the internal spindle that is quoted.

Q: How does the K8 differ from the Kellenberger K10?

Both have 1,150 mm (45.3 in) of Z travel. The Kellenberger K10 has 365 mm (14.4 in) of X travel against 350 mm (13.8 in) on the K8, is listed for parts under 400 mm in diameter where the K8 table gives 200 mm (7.9 in), and uses a FANUC 0i-TF Plus control where the K8 has a Fanuc 0i-F Plus.

Q: What does the K8 need for installation?

The machine weighs 7,500 kg (16,535 lb) and occupies 3,660 × 2,288 mm, so check floor loading and the access route. The electrical supply is listed as 380/400 V, 3 PH, 50 Hz. Coolant, filtration and extraction are not covered by the table and should be itemised in the quotation.

Q: How fast do the axes and workhead of the K8 move?

X feeds at up to 10 m/min (394 ipm) and Z at up to 12 m/min (472 ipm). The workhead speed is stepless from 0–1,000 rpm. The tailstock has a 50 mm (1.97 in) stroke and an MT 4 taper; the workhead taper is MT 5.

Est. $180,000 - $280,000 Specs verified 2026-10-03 · kellenberger.com Updated 2026-10-03

Image: kellenberger.com, Hardinge

Key Specifications

X Travel

350 mm (13.8 in)

Z Travel

1,150 mm (45.3 in)

Max Workpiece ⌀

200 mm (7.9 in)

center distance

1,000 mm (39.4 in)

center height

200 mm (7.9 in)

max workpiece weight

100 kg (220 lb)

How much does the Hardinge Kellenberger K8 cost?

Estimated price range

Est.$180,000 - $280,000

Our best estimate for a cnc grinding machine in this class — not a quote from Hardinge. Configuration moves it a long way.

Overview

The Kellenberger K8 is a universal cylindrical grinder with 1,000 mm (39.4 in) between centres and a centre height of 200 mm (7.9 in). It drives a Ø 500 × 80 × 203.2 mm wheel from a 7.5 kW grinding spindle at a peripheral speed of 50 m/s, and it weighs 7,500 kg (16,535 lb).

The capacity figures describe a shaft machine. Workpieces can weigh up to 100 kg (220 lb) and the maximum workpiece diameter is listed as 200 mm (7.9 in), so the K8 suits long, fairly slender parts: spindles, rolls, hydraulic rods, tool shanks. Z travel of 1,150 mm (45.3 in) is longer than the centre distance, which lets the wheel run clear of both ends of a full-length part for dressing and loading. X travel is 350 mm (13.8 in).

For a machine with an 80 mm wide wheel, 7.5 kW is a moderate drive. It is enough for traverse grinding and for plunge cuts on short diameters, while a full-width plunge in hardened steel will need a conservative infeed. Internal grinding is available with up to 5.5 kW. The workhead runs steplessly from 0–1,000 rpm on an MT 5 taper, and the tailstock has an MT 4 taper with a 50 mm (1.97 in) stroke, so length variation within a batch has to stay inside that stroke unless the tailstock is repositioned.

Axis feed rates are 10 m/min (394 ipm) on X and 12 m/min (472 ipm) on Z, and roundness is listed as better than 0.0005 mm. The control is a Fanuc 0i-F Plus. Plan the installation around a footprint of 3,660 × 2,288 mm and a 380/400 V, 3 PH, 50 Hz supply.

Full Specifications

Parameter	Value
Center Distance	1,000 mm (39.4 in)
Center Height	200 mm (7.9 in)
Max Workpiece Diameter	200 mm (7.9 in)
Max Workpiece Weight	100 kg (220 lb)
Z-Axis Travel	1,150 mm (45.3 in)
X-Axis Travel	350 mm (13.8 in)
Peripheral Speed	50 m/s
Internal Grinding Power	5.5 kW max
CNC Control	Fanuc 0i-F Plus
Machine Weight	7,500 kg (16,535 lb)
Floor Space Required	3,660 × 2,288 mm
X Feed Rate	10 m/min (394 ipm)
Workhead Speed	0–1,000 rpm (stepless)
Roundness Accuracy	< 0.0005 mm
Workhead Taper	MT 5
Tailstock Stroke	50 mm (1.97 in)
Tailstock Taper	MT 4
Z Feed Rate	12 m/min (472 ipm)
Grinding Wheel Size	Ø 500 × 80 × 203.2 mm
Grinding Spindle Power	7.5 kW
Power Supply	380/400 V, 3 PH, 50 Hz (E-exchange)

Specifications sourced from kellenberger.com — verified 2026-10-03

Strengths & Limitations

Strengths

1,000 mm (39.4 in) between centres with 1,150 mm (45.3 in) of Z travel, so the wheel can clear both ends of a full-length shaft
Ø 500 × 80 × 203.2 mm grinding wheel at a peripheral speed of 50 m/s
Roundness listed as better than 0.0005 mm
Stepless workhead speed of 0–1,000 rpm on an MT 5 taper
Machine weight of 7,500 kg (16,535 lb), a substantial mass under a 100 kg (220 lb) workpiece

Limitations

Maximum workpiece weight is 100 kg (220 lb), which limits how much of the 1,000 mm (39.4 in) centre distance a solid steel part can use
Maximum workpiece diameter is listed as 200 mm (7.9 in)
Internal grinding power is 5.5 kW at most, and no internal spindle speed is listed
Tailstock stroke is 50 mm (1.97 in), so batches with large length variation need the tailstock moved
The listed supply is 380/400 V, 3 PH, 50 Hz; check the electrical version for a site on a different supply

Best For

Shafts and spindles up to 1,000 mm (39.4 in) between centres Slender parts up to 100 kg (220 lb) Traverse grinding with an 80 mm wide wheel at 50 m/s Mixed external and light internal grinding, with up to 5.5 kW for bores

Frequently Asked Questions

01 What is the grinding capacity of the Kellenberger K8?

Distance between centres is 1,000 mm (39.4 in) and centre height is 200 mm (7.9 in). The maximum workpiece diameter is listed as 200 mm (7.9 in) and the maximum workpiece weight as 100 kg (220 lb). Z travel is 1,150 mm (45.3 in) and X travel is 350 mm (13.8 in).

02 What grinding wheel and spindle power does the K8 use?

The wheel is Ø 500 × 80 × 203.2 mm, driven by a 7.5 kW grinding spindle at a peripheral speed of 50 m/s. Internal grinding power is listed as 5.5 kW max. The table does not give an internal spindle speed, so the range of bore sizes depends on the internal spindle that is quoted.

03 How does the K8 differ from the Kellenberger K10?

Both have 1,150 mm (45.3 in) of Z travel. The Kellenberger K10 has 365 mm (14.4 in) of X travel against 350 mm (13.8 in) on the K8, is listed for parts under 400 mm in diameter where the K8 table gives 200 mm (7.9 in), and uses a FANUC 0i-TF Plus control where the K8 has a Fanuc 0i-F Plus.

04 What does the K8 need for installation?

The machine weighs 7,500 kg (16,535 lb) and occupies 3,660 × 2,288 mm, so check floor loading and the access route. The electrical supply is listed as 380/400 V, 3 PH, 50 Hz. Coolant, filtration and extraction are not covered by the table and should be itemised in the quotation.

05 How fast do the axes and workhead of the K8 move?

X feeds at up to 10 m/min (394 ipm) and Z at up to 12 m/min (472 ipm). The workhead speed is stepless from 0–1,000 rpm. The tailstock has a 50 mm (1.97 in) stroke and an MT 4 taper; the workhead taper is MT 5.