Valve Seat Resurfacer and Tool Sharpener RPA

The valve shim grinder is essential for grinding valve shims with millimetric precision, ensuring perfect sealing at the valve seat. It also works as a cutting tool sharpener, keeping mills and drills always sharp. The RPA Chinelatto operates with a 150W motor at 2,960 rpm, including diamond and emery stones. It's indispensable for workshops doing cylinder head resurfacing, enabling precise repairs without unnecessarily replacing components.

The RPA Chinelatto grinder features a 150-watt motor with 2,960 rpm rotation, ideal for precision work on valve shims. It operates at 110/220 volts with 0.9A consumption and weighs approximately 33 lb (15 kg). It comes complete with 2¾-inch diamond stone, 4-inch emery stone, and tool-holding devices for ½-inch, 0.31-inch (8mm), and 0.39-inch (10mm) capsules. This power and speed combination ensures professional finishing.

The RPA accepts tools through tool-holding capsules in three sizes: ½ inch, 0.31 inches (8mm), and 0.39 inches (10mm), covering most tools used in grinding shops. The capsule holder device has inclined holes for different sharpening angles. It includes diamond for stone dressing, 1/8" and 3/16" Allen keys for adjustments. This versatility allows sharpening from small drills to larger mills, being complete for workshops that need to keep tools always sharp.

The manual grinder like the RPA requires operator control to position the shim and control grinding, offering greater precision for specific jobs. The automatic performs the cycle alone after programming, being faster for large volumes. The manual allows feeling the part during the process, important for irregular or damaged shims. For smaller workshops, the manual is more economical and versatile, especially when it also needs to sharpen tools like the RPA does.

The process uses the diamond stone rotating at 2,960 rpm to remove material from the shim with precision. The shim is fixed in the device and gradually approached to the moving stone. The operator controls cutting depth, removing thin layers until reaching desired thickness. High rotation and diamond stone ensure smooth finish and exact measurements. It's essential to use coolant and smooth movements to avoid overheating that can warp the shim.

Basic maintenance includes regular cleaning of stones and dressing with the included diamond to maintain efficient cutting. Check alignment of tool-holding devices and lubricate moving points periodically. Keep motor clean and check belt tension. The RPA Chinelatto is robust but requires care with diamond and emery stones - main wear components. Replace when they lose efficiency. With correct use and adequate maintenance, it offers years of reliable operation.

The RPA 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.