Motorcycle Cylinder Boring Machine BVC-65 Chinelatto 1.54-2.56IN

The motorcycle cylinder boring machine is used for precise cylinder boring, correcting wear, scratches and out-of-roundness. It's essential when the piston is knocking with clearance or the cylinder lost its original dimension. The BVC-65 Chinelatto works with cylinders from 1.54 to 2.56 inches (39 to 65mm) diameter, common in motorcycles of various displacements. The process removes uniform material from internal walls, restoring correct geometry to receive new piston and rings. Maximum depth of 6.3 inches (160mm) serves most national and imported motorcycle cylinders.

The BVC-65 boring machine has 0.5hp motor with 220V three-phase 60Hz power supply. Tool rotation is fixed at 600 rpm, ideal for precise machining without causing excessive vibration. Feed is controlled at 0.0035 inches (0.09mm) per revolution, ensuring fine finish and exact dimension. Cutting speed stays at 1.97 IPM (50mm/min), allowing gradual material removal. This combination of low power with controlled rotation is perfect for motorcycle cylinders, which demand higher precision than car engines. The belt-drive system reduces chatter during operation.

The BVC-65 accepts motorcycle cylinders with internal diameter from 1.54 to 2.56 inches (39 to 65mm). This covers from small motorcycles like 125cc up to some 600cc, depending on engine design. Maximum cutting capacity is 0.024 inches (0.6mm) on radius, so it can recover cylinders with moderate wear. Depth goes up to 6.3 inches (160mm), sufficient for long cylinders of 2T and 4T engines. Comes with 5 sets of hardened centering pins for different diameter ranges, ensuring correct cylinder fixation. The motorcycle-specific table facilitates workpiece positioning.

The boring machine removes material from cylinder to increase internal diameter, correcting wear and out-of-roundness. The honing machine only gives final finish, creating crosshatch pattern for oil retention without changing dimensions. The BVC-65 is a boring machine, so it increases cylinder dimension - you need oversize piston afterwards. Boring comes before honing in service sequence. Boring machine corrects major problems (deep scratches, out-of-roundness), while honing machine only improves finish of cylinders already at correct dimension. To recover worn motorcycle cylinder, boring machine is mandatory.

The cylinder is fixed on specific table using hardened centering pins to maintain perfect alignment. Cutting tool rotates at 600 rpm while advancing 0.0035 inches (0.09mm) each revolution, cutting uniformly the internal wall. Manual lubrication system keeps tool cooled and removes chips. Operator controls depth and machine has automatic disengagement at end of stroke. After reaching desired dimension, return is manual. Process leaves cylinder with larger and uniform diameter, ready to receive oversize piston.

Basic maintenance includes lubricating guides and shafts regularly, checking transmission belt tension and keeping tools sharp. Included micrometer helps control cutting tool wear. Manual lubrication system should be cleaned periodically to prevent clogging. Column guides need cleaning after each use to remove chips. Check centering pins alignment and replace when necessary. With proper use and up-to-date maintenance, BVC-65 has long service life. Chinelatto offers technical support and replacement parts to keep machine operational.