RAPID 650

HÖFLER Cylindrical Gear Grinding Machine


Reduced grinding times for more production efficiency

Cylindrical gear manufacturers all around the world appreciate the advantages and productivity of the RAPID 650 for workpiece diameters of up to 650 mm. With standard features that include a cast polymer machine bed, a torque motor-driven machine table, an integrated inspection system, a sturdy grinding spindle, and a dressing system for frequent profile modifications, it is the perfect solution for cylindrical gear manufacturers. Technologies such as high-speed grinding [HsG] and best-fit grinding [BfG] also reduce grinding times by up to 30 % – ensuring a clear leading edge in production efficiency for the entire manufacturing process.

  • Highly flexible direct-drive 5-axis grinding head and swivel angle adjustment during the grinding process
  • Stable, damping-optimized single-bed base made of cast polymer
  • Precise machine table control via torque motor drive
  • Optional internal gear grinding arms
  • Controlled grinding result through integrated measurement and automatic corrections during the grinding process
  • Energy efficiency (e2)
Range of Application
General Data
(Cylindrical) gear outer diameter (max.)

Ø 650 mm

(Cylindrical) gear root circle diameter (min.)

Ø 0 mm

Axial stroke length

650 (1,000/1,500)* mm

Work area over table (min. - max.)

350 – 1,000 (1,350/1,850)* mm

Center distance above table (min. - max.)

500 – 1,200 (1,500/2,000)* mm

Profile height (max.)

80 (60/20)**** mm

Module (min. – max.)

0.5-35***

Pressure angle

without restriction

Swivel angle

–45°/+120°

Grinding wheel diameter (max.)

Ø 400 (300/100)**** mm

Grinding wheel diameter shoulder (min.)

Ø 206 (110/20)**** mm

Grinding wheel width (max.)

90 (60/20)**** mm

Grinding spindle drive (max.)

24 (37)* (38.5)**** kW

Stroke speed of tool slide (max.)

6 m/min (12 m/min)*

Table diameter

Ø 600 mm

Table load (max.)

3,000 kg

Table bore (diameter x depth)

Ø 210 x 700 mm

Table speed (max.)

0 – 45 rpm

Dressing roll (diameter x width)

Ø 120 x 26 (Ø 160 x 13)**** mm

Machine dimensions (L x W x H) approx. incl. all additional components

5,000 x 7,100 x 3,200 (3,500/4,000)** mm

General Machine Data
Net weight approx.

23,000 – 26,000 kg**

Internal grinding*

Various optional internal grinding arms available

Range of Application
General Data
(Cylindrical) gear outer diameter (max.) Ø 650 mm
(Cylindrical) gear root circle diameter (min.) Ø 0 mm
Axial stroke length 650 (1,000/1,500)* mm
Work area over table (min. - max.) 350 – 1,000 (1,350/1,850)* mm
Center distance above table (min. - max.) 500 – 1,200 (1,500/2,000)* mm
Profile height (max.) 80 (60/20)**** mm
Module (min. – max.) 0.5-35***
Pressure angle without restriction
Swivel angle –45°/+120°
Grinding wheel diameter (max.) Ø 400 (300/100)**** mm
Grinding wheel diameter shoulder (min.) Ø 206 (110/20)**** mm
Grinding wheel width (max.) 90 (60/20)**** mm
Grinding spindle drive (max.) 24 (37)* (38.5)**** kW
Stroke speed of tool slide (max.) 6 m/min (12 m/min)*
Table diameter Ø 600 mm
Table load (max.) 3,000 kg
Table bore (diameter x depth) Ø 210 x 700 mm
Table speed (max.) 0 – 45 rpm
Dressing roll (diameter x width) Ø 120 x 26 (Ø 160 x 13)**** mm
Machine dimensions (L x W x H) approx. incl. all additional components
5,000 x 7,100 x 3,200 (3,500/4,000)** mm
General Machine Data
Net weight approx. 23,000 – 26,000 kg**
Internal grinding* Various optional internal grinding arms available

* Available at additional cost
** Depends on machine construction combined with ****
*** Depends on gear geometry
**** K variant: optional grinding spindle, specifically for small grinding wheels *

Subject to changes.

RAPID 650 Technical Data Sheet English
(PDF, 562 KB)
RAPID 650 Brochure English
(PDF, 5 MB)
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*Compulsory field