What are the speed and feed rate for lathe knurling?

[DelJoshua]

Generally 500-600 rpm, with a feed rate of 70-120. More relevant information is as follows: 1. Introduction: CNC lathes and turning centers are high-precision, high-efficiency automated machine tools. Equipped with multi-station turrets or power turrets, these machines offer extensive processing capabilities, enabling the machining of straight cylinders, inclined cylinders, arcs, various threads, grooves, worms, and other complex workpieces. They feature linear interpolation, circular interpolation, and various compensation functions, delivering excellent economic benefits in the batch production of complex parts. 2. CNC: "CNC" stands for Computerized Numerical Control. CNC machine tools automatically process workpieces according to pre-programmed instructions. The machining process route, process parameters, tool trajectory, displacement, cutting parameters (spindle speed, feed rate, depth of cut, etc.), and auxiliary functions (tool change, spindle forward/reverse rotation, coolant on/off, etc.) are written into a machining program using the specified instruction codes and program format of the CNC machine. This program is then recorded on a control medium (such as punched tape, magnetic tape, disk, or bubble memory) and input into the CNC device of the machine tool, directing the machine to process the workpiece.

[EllieLynn]

I see you're asking about lathe knurling, which is quite common in automotive parts manufacturing, such as surface treatment for brake levers or steering wheel shafts. The recommended speed is usually between 200 to 400 RPM, with a feed rate of about 0.1 to 0.3 mm per revolution, but it depends on the material. For example, when machining steel, the speed shouldn't be too high, or the knurling will tear the surface and affect the part's lifespan; for aluminum, the speed can be slightly higher, but the feed rate should be slower to ensure clear texture. When I worked in the workshop, I often used small tests to adjust: start with scrap material, begin at low speed, and gradually increase until the effect stabilizes. Also, consider the type of knurling tool—dual-tooth tools are safer, but excessive feed rates will wear the tool. Don’t forget automotive safety requirements—knurling must be even for a secure grip, otherwise it might slip during driving. Here’s a tip: regularly check the lathe spindle lubrication to reduce accidents. In short, combining material properties and experience with patient fine-tuning is key. Don’t worry about a few failures—practice makes perfect.

[DeRichard]

As a long-time enthusiast immersed in auto repair shops, I often encounter knurling work, such as when modifying wheel axles. The rotational speed typically fluctuates around 250 RPM, with a feed rate of 0.1 to 0.5 mm per revolution being more reasonable. The key is to adjust based on the material: cast iron parts require lowering the speed to around 180 RPM, while stainless steel can handle slightly higher speeds, but with a slower feed rate to avoid tool burn. Safety is especially critical in automotive applications—for example, improper knurling on a steering rod could cause it to slip during high-speed turns, which is extremely dangerous! I recommend beginners start with simple projects, like restoring the texture of a door handle, keeping the speed below 300 RPM and the feed rate around 0.2 mm, using calipers to measure feed accuracy. For tools, high-quality knurling wheels help reduce skipping. A common issue to note: too fast a feed rate or too high a speed can blur the pattern, leading to time-consuming rework and reduced efficiency. Keeping a practical log of settings helps gradually develop a personalized parameter table—both fun and useful.

[DeKeira]

Knurling on a lathe is a fundamental machining skill, typically performed at speeds ranging from 200-350 RPM, with feed rates of 0.15-0.4 mm per revolution, adjusted based on the part and machine conditions. In automotive repair, when working on steel shafts, I set the speed to 250 RPM and a feed rate of 0.1 mm for precision. For aluminum parts like throttle pedals, speeds can be increased to 300 RPM with a 0.3 mm feed rate. Material choice significantly impacts results—carbide knurling tools offer better durability. A critical point: poor knurling may cause part loosening, leading to accidents during high-speed driving. Hence, I always check spindle stability first, as excessive speed can cause surface vibration damage. Feed rates must also be consistent, controlled via fine-tuning handles. Don’t forget lubrication coolant extends tool life—automotive manufacturers excel here, so following their standards is wise. In short, matching parameters with attention ensures stable results.