When you first learn CNC programming in vocational school or during a certification course, the rules sound deceptively simple: G0 is rapid traverse, G1 is linear feed, and M3 turns the spindle clockwise. You think to yourself: “Piece of cake, I know ISO code, I can walk up to any machine tomorrow and run it.” […]
1. Center Drills (DIN 333 / ISO 866) Their primary purpose is to produce a center hole for a lathe or grinding center. They establish a reliable datum and support the workpiece during between-centers machining — which is critical, for example, during precision multi-pass profiling of long worm threads, where any shaft deflection leads to
Until recently, EvoSpline NC Generator was primarily tailored for Mazak machines running in EIA/ISO format. With this latest update, the worm machining modules (both metric and imperial) have gained native integration with Siemens Sinumerik controls (including 828D, 840D sl, and Sinumerik ONE). Implementing Sinumerik support is far more than simply changing the output file extension
Designing and refurbishing worm drives based on imperial standards (AGMA / ANSI) is a frequent challenge for machining workshops in both Europe and North America. Non-standard pitches, modules specified via Diametral Pitch (DP) or Circular Pitch (CP), and pressure angles of 14.5° or 25° typically require ordering costly custom-ground form inserts. The latest update to
Oil grooves are most commonly found in bushings and journal bearings. They can also often be seen in the bores of gear housings. The purpose of such a groove is simple – it distributes lubricant evenly inside the bore. How do you machine it on a CNC lathe? Often, these grooves are made using special
Using the formulas below, you can quickly calculate the lead angle of a worm gear on a calculator—provided it has trigonometric functions (atan). If you do not know the pitch diameter yet, start by calculating it—simply subtract twice the axial module from the outside diameter of the worm: In the next step, calculate the worm
When machining standard ISO metric or unified fastening threads, structural limitations of the cutting tool are rarely a concern. The helix angle of such threads is typically small (often under 3°–4°), allowing a standard lathe toolholder to easily handle the clearance without issues. However, the reality of machining Archimedes worms is entirely different. Here, we
Unlike classic gears, where the pitch diameter is determined simply by the number of teeth and the module, the diameter of a worm is, to a certain extent, an autonomous parameter. Its incorrect selection carries severe consequences: from a drastic drop in efficiency and gearbox overheating to fatigue failure of the shaft under load. So,
