We produce radius truing devices, both overhung mounted and twin grip, for truing of convex and concave radii and for a variety of grinding wheel dimensions. An optimum truing result as regards run-out is essential for the grinding operation. Depending on the type of the radius truing device, a single point truing diamond or a truing spindle with diamond disk may be used. The uniform swivelling motion is generated using a geared DC-motor, a three-phase servomotor or a hydraulic rotary drive.

Our radius truing devices are outstanding due to their perfect precision and the execution backlash-free in radial and axial direction with a form error of ± 1 µm.

We develop, produce, and supply radius truing devices specially designed for your machine.

The radius truing device with twin-grip high precision bearings is mounted on the machine table of the external cylindrical grinding machine. The diamond coated roll is driven by the truing spindle AS58x94F/025. The contour to be trued may also be traced using a single point truing diamond supported by an adaptor.

The radius truing device is moved by the machine table to a position in front of the grinding wheel, and the truing wheel is beside the grinding wheel. Then the grinding wheel is advanced by the truing amount and the radius is traced. After truing, the radius truing device is returned. The radial movement is generated by means of a servomotor with harmonic drive reduction gear.

Specifications

• Greatest adjustable radius: R = 20 mm
• Largest grinding wheel Ø: 400 mm
• Dressing spindle AS58x94F/025
• Diamond roller mounting Ø: 20h2 mm
• Diamond roller mounting width: 10 mm
• Diamond roller external Ø: 60 mm
• Speed with grease lubrication: max. 22000 RPM

Power data

• Fanuc Servomotor IP67: A06B-0373-B575/7076 with Harmonic Drive gear HFUC-20-100-2UH-SP
• Reduction ratio = 100:1

The radius truing device effectuates the truing of very exact concave radii. The infeed of the single point truing diamond is carried out by means of a step motor infeed and the pneumatic clamping of the sleeve.

The radial movement is generated by means of a servomotor with harmonic drive reduction gear.

Specifications

• Largest grinding wheel Ø: 610 mm
• Greatest adjustable radius: R = 65 mm (Concave)
• Single point truing diamond: Ø8×35

Power data

• Servomotor with Harmonic Drive gear
• FFA-32B-100-H-E2048-B, Reduction ratio = 100:1

Technical data axis of rotation

• Berger Lahr, 3-phase-step motor VRDM 368
• 1000 step
• VRDM368/50LWA 00IP41 00 D80 38 000S400
• Roller-thread driving: RGT12.1-175 long -KL10
• Pneumatic cylinder: ADN-16-5-A-P-A

The overhung radius truing device offers a single grain diamond truing. The swivelling arm moves the truing spindle from its resting position near to the grinding wheel. Then the grinding wheel is advanced by the truing amount and the radius is generated. Now the radius truing device is returned to its resting position.

The swivelling movements are executed by means of a hydraulic cylinder. The radial movement is generated by means of a servomotor with harmonic drive reduction gear.

Specifications

• Greatest adjustable radius: R = 25 mm
• Largest grinding wheel Ø: 120 mm
• Single point truing diamond: Ø 8 x 35, 1 Karat

Power data

• Fanuc Servomotor IP67: A06B-0373-B575/7076 with Harmonic Drive gear HFUC-20-100-2UH-SP,
• Reduction ratio = 100:1

The radius truing device is suitable for the limited space available on internal cylindrical grinding machines. The device is equipped with the truing spindle AS58x94F/025.

The swivelling arm moves the truing spindle from its resting position near to the grinding wheel, then the grinding wheel is advanced by the truing amount and the radius is generated. Now the radius truing device is returned to its resting position. The swivelling movements are executed by means of a hydraulic cylinder. The radius movement is generated by means of a geared DC-motor.

Specifications

• Greatest adjustable radius: R = 25 mm
• Largest grinding wheel Ø: 120 mm
• Dressing spindle AS58x94F/025
• Diamond roller mounting Ø: 20h2 mm
• Diamond roller mounting width: 10 mm
• Diamond roller external Ø: 60 mm
• Speed with grease lubrication: max. 22000 RPM

Power data

• DC motor with transmissions; Reduction ratio 288:1

The overhung radius truing device is mounted on the machine table of the cylindrical grinding machine. The radial movement is generated by means of a servomotor with a free from play worm drive reduction gear. The radius is trued by means of a single point diamond. With an adaptor bracket, the radius can also be trued by means of a diamond roll, which is driven by a dressing spindle AS58x94F/026.

Specifications

• Largest grinding wheel Ø: 400 mm
  Radius concave max. 30 mm;
  Radius convex max. 30 mm
• Largest grinding wheel Ø: 500 mm
  Radius concave max. 30 mm;
  Radius convex max. 10 mm
• Single point truing diamond: Ø 9.52 mm x 35 mm
• Height of centres: 225 mm

Power data

• Fanuc Servomotor IP67: A06B-0373-B575/7076 with Harmonic Drive gear HFUC-20-100-2UH-SP,
• Reduction ratio = 100:1