Pricing, GST and units
For quoting and everyday office work.
Machining
Speeds, times, fits, threads and set-up on the machine.
- Cutting speed and RPM calculatorSpindle RPM from cutting speed and diameter, with typical speeds by material and tool, and the feed rate.
- Machining time calculatorCutting time per part and for a whole batch, with setup and loading time.
- ISO fits calculatorHole and shaft limits for H7/g6, H7/h6, H7/p6 and other ISO 286 fits, up to 500 mm.
- Thread chartPitch, tap drill, clearance hole and stress area for metric threads, plus BSP pipe threads.
- Bolt circle (PCD) calculatorX and Y coordinates of holes on a pitch circle diameter.
- Taper and sine bar calculatorTaper angle, compound slide setting and ratio, and sine bar slip gauges.
- Surface finish converterRa, N grades, microinch and Rz, with the old triangle symbols.
Material
Weight and hardness of the stock you buy and cut.
Sheet metal, presses and casting
Bending, punching and pattern or mould sizes.
- Bend allowance calculatorFlat length, bend allowance and bend deduction for sheet metal, with K-factor and V-die guidance.
- Press brake bending force calculatorAir bending force from thickness, bend length, V-die and material.
- Punching and blanking force calculatorForce to punch a hole or blank a part, and the press tonnage to choose.
- Shrinkage calculatorPattern size for castings and mould cavity size for plastic parts, from the part size and material.
Design
Gears and bolted joints.
The results are typical values for planning and quoting. Check critical figures against your drawing, the standard or your supplier. More reference: the engineering library of materials, machines and kinds of job work.
Have something that needs making?
Post your requirement free. Workshops that take your kind of work see it and get in touch. You only talk to the ones that fit.
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