Fun Stuff
Handy workshop reference charts to view online or download and print.
Drill Size Chart
Number, letter, fractional and metric drills with inch and millimetre equivalents.
Tap Drill & Clearance Drill Chart
Tapping, forming-tap and clearance drills for Metric, UNC, UNF, BSW, BSF, BA, BSP, BSPT, NPT and NPS threads.
Arbor & Taper Chart
Morse, Jacobs and B tapers, 7:24 steep tapers (DIN 2080, SK, BT, CAT), R8, shell mill and horizontal milling arbors, with line drawings.
Collet Chart
ER and OZ collets, plus 5C, R8, Morse taper draw-in and Clarkson / Autolock screwed-shank collets, with line drawings.
Thread Identification & Pitch Chart
Identify a thread by diameter and pitch: thread form drawings, a metric / TPI pitch table with the near misses, sizes by measured diameter, and odd threads - UNEF, ME, BSB, cycle, Tr and Acme.
Welding Reference Chart
Stick electrode codes and amps, rod drying, preheat, MIG wires and settings, shielding gases, TIG tungsten colours, weld symbols, lens shades and process numbers.
Bolt, Spanner & Hex Key Size Chart
Spanner and hex key sizes for metric (ISO and old DIN), Unified, Whitworth and BA fasteners, every spanner size in order with the near misses, hex keys and Torx.
Bolt Torque Chart
Tightening torque for metric grades 4.6 to 12.9, fine threads and stainless, SAE grades 2, 5 and 8, with head markings, lubrication factors and conversions.
Cutting Speeds, Feeds & Insert Guide
Cutting speeds by material, rpm tables, drill feeds and rpm, end mill feeds, and how to read ISO insert codes, insert boxes, grades, chipbreakers and toolholder codes.
Bolt Hole Circle (PCD) Chart
X / Y coordinates for 3 to 16 equally spaced holes, on or straddling the centreline, chord factors, and standard flange drilling for EN 1092 PN10 / PN16, ANSI Class 150 and BS 10 Table D / E.
Sheet Bending Chart
Press brake force and V-die selection, minimum radius and springback by material, bend allowance, bend deduction and K-factor for flat lengths, and manual folders (bending brakes) - capacity, setting up, boxes and hems.
Wire & Sheet Gauge Conversion Chart
Gauge numbers to millimetres for SWG, AWG, BWG, US steel, galvanised and stainless sheet, and AWG wire to metric cable sizes.
Brazed Carbide Tool Selection Chart
Which brazed carbide lathe tool does which job - each ISO 243 tool plus pulley and bull nose tools shown cutting, right and left hand, shank sizes, carbide grades, regrinding and problems.
Engineering Conversion Chart
Inch fractions to decimals and mm, mm to inch, multiply-by factors for pressure, torque, power, force, stress and more, hardness conversions HRC / HRB / HV / HB with typical material hardness, and temperature.
Reaming, Fits & Tolerances Chart
Choosing a fit from loose running to press fit, ISO 286 limits for H7, H8, H9, H11, G7, JS7 holes and f7 to p6 shafts, IT grades by process, and reaming - stock to leave, drill sizes, speeds, feeds, reamer types and problems.