Automatic Valve Seat Grinder RAS-300M for Motorcycles

The machine is used to grind and recondition valve seats in motorcycle cylinder heads. During engine operation, seats suffer wear and need to be resurfaced to ensure perfect sealing between valve and seat. The RAS-300M equipment automatizes this process with simulated manual movements in all directions, maintaining the precision necessary for perfect operation of intake and exhaust valves.

The RAS-300M grinder has suction shaft spindle speed of 300 rpm and 0.25 hp electric motor. Operates at 220/380 volts, 60 hertz, three-phase. The suction shaft height is adjustable up to 5.9 inches (150 mm). Total equipment dimensions are 15.7 x 18 x 35.4 inches (400 x 458 x 900 mm), with approximate net weight of 132 lb (60 kg). Includes built-in vacuum gauge and digital time selector for automatic process control.

The RAS-300M has cylinder head holding device with dimensions of 9 x 34.1 inches (230 x 865 mm), being suitable for motorcycle cylinder heads of various sizes. The equipment comes equipped with inclined cylinder head holding device for automobile line, offering versatility for different types of heads. The adjustable height of 5.9 inches (150 mm) allows working with cylinder heads of varying heights, ensuring secure fixation during valve seat grinding process.

The automatic grinder like the RAS-300M offers automatic operation with digital time selector and audible signal at completion, while manual depends on operator skill and constant control. The automatic performs simulated manual movements in all directions (left, right, up, down) consistently, ensuring uniform results. Grinding time is approximately 1 minute per seat, being faster and more precise than the manual process.

The process works with the cylinder head fixed in the head holding device and suction cup positioned over the valve seat. The built-in vacuum gauge ensures adequate pressure for stone attachment. The equipment performs fast spins at 300 rpm with automatic movements simulating manual work in all directions. The digital selector controls grinding time and an audible signal indicates completion. The entire process takes about 1 minute per valve seat.

Maintenance includes regular checking of vacuum system through built-in vacuum gauge and cleaning pressure hoses monitored by air pressure gauge. It's important to keep the 0.25 hp electric motor clean and check electrical connections. Grinding stones must be replaced according to wear. The cylinder head holding device must be kept aligned and clean. Periodic verification of automatic movements ensures RAS-300M equipment precision.

The RAS-300M is quoted on demand, and pricing varies with each customer's needs, including accessories, tooling and optional features. With in-house technology developed by Chinelatto in Brazil since 1962, you can count on responsive support from our technical team. Spare parts: many are kept in stock and the others are manufactured within a reasonable lead time. Request a quote at chinelatto.com.br/contact — our sales team will contact you very soon.