#cnc

Machining cutting-speed and feed maths as an API, computed locally and deterministically. The speed endpoint converts between cutting (surface) speed and spindle rpm for a given tool or workpiece diameter, in both directions and in either unit system: metric uses N = Vc·1000/(π·D) with Vc in metres per minute and D in millimetres, and imperial uses RPM = SFM·12/(π·D) with the surface speed in feet per minute and the diameter in inches. The feed endpoint computes the table feed rate from the feed per tooth (chip load), the number of teeth or flutes and the spindle rpm for milling (feed = fz·z·N), or from the feed per revolution for turning and drilling, and reports it in millimetres or inches per minute. The materials endpoint lists typical carbide cutting speeds by material, from aluminium and brass through mild and stainless steel to titanium, with a note to use about a third for HSS tooling. Everything is computed locally and deterministically, so it is instant and private. An indicative aid — always confirm with the tool maker's data and adjust for depth of cut, coolant and rigidity. Ideal for CNC and machine-shop tools, CAM and feeds-and-speeds apps, maker and hobby machining, and manufacturing calculators. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is machining feeds and speeds; for screw-thread pitch and tap drill use a thread API and for bolt-circle layouts use a bolt-circle API.

api.oanor.com/machining-api

Bolt-circle (bolt pattern / PCD) geometry as an API, computed locally and deterministically. The coordinates endpoint lays out a set of equally spaced holes on a circle: from the bolt-circle diameter (or radius), the number of holes, an optional start angle, centre offset and direction, it returns the X and Y coordinate and angle of every hole, the angular step (360 ÷ number of holes) and the chord between adjacent holes — exactly what a CNC or drawing needs. The chord endpoint gives the straight-line distance between any two holes on the pattern using chord = 2·R·sin(central angle ÷ 2), taking the shorter way around. The diameter endpoint works in reverse: from a measured distance between two holes and the number of holes it recovers the bolt-circle diameter, so you can reverse-engineer an existing flange or wheel. Lengths are unit-agnostic — the output is in whatever unit you supply. Everything is computed locally and deterministically, so it is instant and private. Ideal for CNC and CAD tools, machining and fabrication apps, flange, wheel and hub design, and drilling-jig and robotics projects. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is bolt-circle geometry; for screw-thread pitch and tap drill use a thread API and for spur-gear geometry use a gear API.

api.oanor.com/boltcircle-api