CNC Cylindrical grinding machines in several models:
BUA series – Practic and Profi versions,
BUB series – Practic, Profi and Multi versions,
BUC series – Practic, Profi and Multi versions
Basic machine design
– control system SIEMENS Sinumerik 840D sl
– compact operator panel with membrane keyboard
– PLC SIEMENS Simatic S7 – 300
– user’s software for the machine in the basic version
– remote diagnostics
– software-controlled swivelling of grinding unit (axis B – Multi version only)
– digital AC servomotors with digital drive converters (axes X, Z and C9)
– brushless ring torque motor with direct measuring in B-axis (Multi version only)
– wheel head in-feed (axis X) and table traverse (axis Z) by means of ball screws
– cast-iron bed (front and rear) connected with pins and bolts
– upper swiveling table (except BUC-C/6000)
– wheel head in-feed with closed-rolling guide way (VM bars)
– wheel head with roller-bearing spindle
– safety guard of grinding wheel
– work head manually swiveling and moveable with step-less speed variation of work piece
– tailstock manually moveable with hydraulically operating of tailstock barrel and cylindricity correction
– partial protection of working space with sliding doors and rear coolant splash guard
– switch electrical cabinet with cooling unit RITTAL
– automatic lubrication of guide ways and ball screws of wheel head and table
– tailstock-mounted wheel dresser with blade-type diamond tool
– standard equipment
– machine outfit
BUA 25 B
| Machine data | Unit | Practic, Profi |
| Swing diameter | mm | 250, 315 *) |
| Distance between centres | mm | 500, 750, 1,250 |
| Maximum weight of work piece | kg | 250 |
| Live spindle grinding, including fixture | kg | 50 |
| Between dead centres | kg | X |
| Grinding wheel dimension | mm | 400 x 40 x 127 |
| Max. peripheral speed of grinding wheel | m/s | 50 |
| Work head spindle revolutions | rpm | 20 – 800 |
| Wheel head swiveling range (manual), (Practic, Profi) | ° | 45÷-15 |
| Work head swiveling range (manual) | ° | 0 ÷ +90 |
| Table swiveling with a centre distance of (mm): | ||
| 500 | ° | 10°30′ ÷ -6° |
| 750 | ° | 9 ÷ -5° |
| 1,250 | ° | 6°30′ ÷ 3°30′ |
| Electrical network – standard | 3 x 400 v, 50Hz, TN-C-S | |
| Wheel head motor power | kW | 5,5 S6 – 60% |
| Total peak power demand of machine | kVA | 18 |
| Tolerance of work piece diameter | IT 4 | |
| Weight of machine with standard accessories with centre distance of (mm): | ||
| 500 | kg | 3,650 |
| 750 | kg | 3,950 |
| 1,250 | kg | 4,250 |
| *) other machine execution |
BUB 40, 50 B
| Technical data | Unit | Practic, Profi | Multi |
| Swing diameter | mm | 400, 500 | 500 |
| Max. distance between centres | mm | 1,000, 1,500, 2,000, 3,000 | 1,000, 1,500, 2,000, 3,000 |
| Max. work piece weight between dead centres | kg | 500 | 500 |
| Live spindle grinding including fixture | kg | 100 (250)* | 100 |
| Between dead centres and supported by steady rests | kg | 700 | 700 |
| Grinding wheel dimensions – standard | mm | 500 x 80 x 203 | 500 x 80 x 203 |
| Max. peripheral speed of grinding wheel | m/s | 50 | 50 |
| Work piece revolutions | rpm | 6–170, 30-900 | 6–170, 30-900 |
| Wheel head swiveling range (manual), (Practic, Profi) | ° | -15 ÷ +45 | |
| Programming wheel head swiveling range (Multi) | ° | -195 ÷ +30 | |
| Work head swiveling range (manual) | ° | 0 ÷ +90 | 0 ÷ +90 |
| Table swiveling with a centre distance of (mm): | |||
| 1,000 | ° | 8°30′ ÷ -4°30′ | 8°30′ ÷ -4°30′ |
| 1,500 | ° | 7 ÷ -4° | 7 ÷ -4° |
| 2,000 | ° | 6°-3′ | 6°-3′ |
| 3,000 | ° | 4°30′ ÷ -2° | 4°30′ ÷ -2° |
| Power supply – standard | 3 x 400 v, 50Hz, TN-C-S | 3 x 400 v, 50Hz, TN-C-S | |
| Wheel head motor power | kW | 11 | 11 |
| Total peak power demand of machine | kVA | 51 | 51 |
| Tolerance of work piece diameter | IT 4 | IT 4 | |
| Machine weights with standard equipment (mm) | |||
| BUB | BUB 40B BUB 50B | MULTI | |
| 1,000 | kg | 6,750 7,000 | 8,000 |
| 1,500 | kg | 7,250 7,500 | 8,500 |
| 2,000 | kg | 7,750 8,000 | 9,000 |
| kg | 8,650 8,900 | 10,400 |
BUB 63 C, 85 C
| Practic, Profi | Multi | ||
| Swing diameter | mm | 630, 850 | 630, 850 |
| Max. distance between centres | mm | 2,000, 3,000, 4,000 | 2,000, 3,000, 4,000 |
| 5,000, 6,000 | 5,000, 6,000 | ||
| Max. work piece weight between dead centers | kg | 3,000 | 3,000 |
| live spindle grinding including fixture | kg | 300 | 300 |
| between dead centres and supported by steady rests | kg | 4,000 | 4,000 |
| Grinding wheel dimensions – standard | mm | 750 x 100 x 305 | 750 x 100 x 305 |
| Max. peripheral speed of grinding wheel | m/s | 50 | 50 |
| Work piece revolutions | rpm | 4 – 38, 24 – 230 | 4 – 38, 24 – 230 |
| Wheel head swiveling range (manual), (Practic, Profi) | ° | 30 ÷ -10 | |
| Programming wheel head swiveling range (Multi) | ° | -225 ÷ +45 | |
| Work head swiveling range (manual) | ° | 0 ÷ +90 | 0 ÷ +90 |
| Table swiveling with a centre distance of (mm): | |||
| 2,000 | ° | 6°30′ ÷ -5° | 6°30′ ÷ -5° |
| 3,000 | ° | ± 5° | ± 5° |
| 4,000 | ° | ± 4° | ± 4° |
| 5,000 | ° | ± 3° | ± 3° |
| 6,000 | ° | 0° | 0° |
| Electrical network – standard | 3 x 400 V, 50Hz, TN-C-S | 3 x 400 V, 50Hz, TN-C-S | |
| Wheel head motor power | kW | 19 S6 – 60% | 19 S6 – 60% |
| Total peak power demand of machine | kVA | 65 (85)* | 65 (85)* |
| Tolerance of work piece diameter | IT 4 | IT 4 | |
| *) other machine execution, special accessories |
| Machine weights with standard equipment (mm) | BUC 63 | BUC 85 | BUC 63 | BUC 85 | |
| 2,000 | kg | 12,540 | 12,840 | 15,350 | 15,650 |
| 3,000 | kg | 14,250 | 14,530 | 17,600 | 17,900 |
| 4,000 | kg | 15,960 | 16,260 | 19,600 | 19,900 |
| 5,000 | kg | 17, 670 | 17,930 | 21,950 | 22,250 |
| 6,000 | kg | 19,380 | 19,690 | 24,200 | 24,500 |
For all inquiries and more info about our machines please contact us by:
Phone: +420 326 633 230
email: info-tos@sub-tos.cz
