Spur test rods mainly used for runout and straightness measurement instruments and equipment, test rods at each end of a central hole for the top equipment of solid use, the working surface precision grinding together, grinding them in need special material of the wheel, which is made of bearing steel, hardness can reach a Shore hardness of 52-60 degrees. After two temporary fire quenching process, making accuracy and stability, not deformed, not rusty, save convenient, it is an ideal detection tool. Spur test rods used Size: 3 * 30 6 * 50 10 * 100 12 * 150 20 * 250 30 * 300 30 * 350 40 * 400 42 * 500 50 * 600 60 * 750 70 * 800 80 * 1000mm, etc. Test rods error requirement: Cylindrical ≤0.002mm straightness ≤0.0035mm. If you have special requirements can be based on customer requirements and drawings custom processing, have any questions or need can always call our factory and look forward to your call to exercise. I plant: threaded plug, threaded ring, smooth Cypriot ring, smooth ring gauge, calipers, sine, Mohs gauge, various test rods, cylindrical Square, square boxes, flat, V-shaped frame, granite slab, flat feet parallel to the regulation, rectangular device, square boxes and other non-scalar gage. Mitsubishi imports of wire walking external processing Tel:. 18632765185 0317-8197217 QQ: 1106539470 Website: http://www.hhjmlj.com/