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Grinding machines

Name of a product Inventory number Producer YOM Parameters  
BKO 50/1700

BKO 50/1700

 241346 TOS Hostivař Max. diameter of grinding: 20 in
Max. length of grinding: 68 in
Max. weight of workpiece: 120 kg
Main motor power: 7,5 kW
Machine dimensions l x w x h: 193.2 x 102 in
Machine weight: 7800 kg
540L

540L

 241369 Jones & Shipman Max. length of grinding: 19.2 in
Max. width of grinding: 6.8 in
Max. workpiece height: 0 in
Spindle bearing grinders: Horizontální
Table dimensions: 18 x 6 in
Main motor power: 1,5 kW
AWH 600 CNC

AWH 600 CNC

 241426 PMT MACHINES 2007 Control system Siemens: Sinumerik 840 D
Max. diameter of grinding: 14 in
Max. length of grinding: 24 in
Max. weight of workpiece: 80 kg
Device for internal grinding: NO
Travel X-axis: 16 in
SA 6U

SA 6U

 241442 WMW Max. length of grinding: 60 in
Max. width of grinding: 12 in
Max. workpiece height: 0 in
Spindle bearing grinders:
RHU 750

RHU 750

 241448 Fritz Studer AG Max. diameter of grinding: 10 in
Max. length of grinding: 30 in
Max. weight of workpiece: kg
Device for internal grinding: NO
Main motor power: 3 kW
Machine dimensions l x w x h: 96 x 52 x 60 in
BUA 16 A

BUA 16 A

 241482 TOS Hostivař 1978 Max. diameter of grinding: 6.4 in
Max. length of grinding: 10 in
Max. weight of workpiece: 10 kg
Device for internal grinding: YES
Machine dimensions l x w x h: 76 x 44 x 60 in
Machine weight: 1400 kg
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Grinding is a technology of precision chip machining. Nowadays, it is possible to reach precision in order of tenths of micrometers and surface roughness of up to 0,2 micrometer. Grinders are thus indispensable in the machinery industry and form an important part of the production process. In general, grinding is a technology that works on the principle of the material removal from the surface layer of the workpiece with fine grains of abrasive material, which are most often bonded to the grinding wheel.   

Grinders with centers and without centers:

Among the cylindrical grinders we differentiate grinders with centers and without centers. These machines are used for grinding internal and external rotating surfaces. 

In case of center grinders the workpiece is usually clamped between centers and rotation is realized using a driver, which is fixed to the surface of the workpiece and tied to headstock. In most cases the workpiece rotates against the direction of rotation of the grinding wheel. Most common models from producer TOS we can mention:

  • BHU,
  • BUB,
  • BUC,
  • BUT,
  • BUA,
  • UB….and many others. 

Grinding is realized using the rotation of the grinding wheel, which grinds the surface of the workpiece as it rotates. Most popular producers of such grinders are: FERMAT, TOS, STUDER, DANOBAT, KELLENBERGER, ERWIN JUNKER, SCHAUDT.

Centerless grinders are also intended for grinding rotary surfaces. The clamping of the workpiece on the machine is different. It is supported with support ruler and the workpiece is placed between two discs – abrasive and drifting. The grinding wheel usually spins faster and does the grinding itself.  The drive disc is most often made of flexible material (for example rubber) and ensures sufficient pressure. 

A special category of grinders are grinders used for grinding of internal rotating surfaces. They works similarly to center grinders. However, the workpiece is just clamped on one side in the chuck or collet so that the hole can be ground from the other side.