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BÜTFERING SWT 134 RRK – three-belt wide-belt sander
The Bütfering SWT 134 RRK is a three-belt wide-belt sander with two calibrating units followed by a combination unit. It allows three grit stages in one pass and is designed for solid wood, frames, edge-glued panels, MDF, chipboard and plywood. Working width is 1,100 mm.
This archive treats SWT 134 RRK and SWT 134 RRC as equivalent designations: K denotes Kombi and C denotes Combi. This designation mapping is based on equivalence confirmed by the archive operator.
Machining and machine configuration
The first calibrating unit has a grooved steel contact roller. The second uses a grooved rubber-covered contact roller rated at 85° Shore. The final combination unit incorporates a grooved rubber-covered contact roller rated at 65° Shore and a pneumatically supported sanding pad. All three contact rollers measure 160 mm in diameter. The units have independent drives. Documented standard equipment includes automatic workpiece thickness adjustment, continuously variable inverter-controlled feed, pushbuttons and a multifunction display, a wear-free brake and Poly-V drive belts.
Technical data for the standard version
| Manufacturer | Bütfering |
|---|---|
| Model | SWT 134 RRK / SWT 134 RRC |
| Machine type | three-belt wide-belt sander |
| Number of working units | 3 |
| Working width | 1100 mm |
| Workpiece thickness | 3–160 mm |
| Sanding belt dimensions (width × length) | 1120 × 1900 mm |
| Unit motor ratings in processing order | 15 / 15 / 11 kW |
| Cutting speeds in processing order | 21 / 21 / 12 m/s |
| Feed speed | 2.5–13 m/min |
| Compressed air pressure | 6 bar |
| Approximate extraction airflow | 4320 m³/h |
| Extraction air velocity | 20 m/s |
| Total connected load | 43 kW |
| Dimensions (length × width × height) | 1900 × 1850 × 1900 mm |
| Weight | 2300 kg |
Application and classification
Three successive units allow staged processing from calibration to finish sanding. The resulting surface depends on the material, abrasive grits, feed rate and unit settings. These figures reflect the historical brochure specification; the equipment of an individual used machine may differ.
