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20.75mm HSS T/S DRILL
HSS Taper Shank Drills – Metric Continued
To drill steels with a tensile strength up to 1.000 N/mm2, cast steel, grey cast iron, malleable cast iron, nickel brass and graphite. Point angle: 118°, helix angle: normal, relief angle: normal, tolerance of diameter: h8.
Manufacturing Standard: DIN 345.
Out of stock
SKU : SHR0252794E
HSS Taper Shank Drills – Metric Continued
To drill steels with a tensile strength up to 1.000 N/mm2, cast steel, grey cast iron, malleable cast iron, nickel brass and graphite. Point angle: 118°, helix angle: normal, relief angle: normal, tolerance of diameter: h8.
Manufacturing Standard: DIN 345.
Specification :
Brand : Sherwood
Diameter (mm) : 20.75
eCl@ss Code : 21010101
Flute Length (mm) : 145
Overall Length (mm) : 243
Overall Weight : 0.39
UNSPSC Code : 23241639
| Weight | 1 kg |
|---|
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THE REF FLIPCHARTS 4TH EDITION WIRORead moreEngineers Reference Data Charts
Now with 38 pages of engineering data. Each page coated with an gloss lamination to protect against the dirt and grease encountered in workshop conditions.
Contents:
⢠Basic forms of heat treatment
Colour charts for tempering and for hardening & forging.
⢠Material groups
Colour coded machineability chart and hardness listing.
⢠Tensile strength and hardness
Shore hardness and equivalent tensile strengths and conversions included.
⢠Lubricant selection
Colour coded materials chart and dilution guidelines.
⢠Hole and shaft tolerances
H7-e8 tolerances for counterbores included.
⢠Metric screw and hole sizes
⢠Thread notation
Explains terminology used to define thread characteristics.
⢠Standard thread forms;
Sequenced logically, tapping and clearance sizes integrated into single chart and colour highlighted for quick reference. Includes special metric pitches & NPT, distinctions made between ‘Rp’ and ‘G’ series BSP. ISO 529 pitch form diagrams shown. Now also lists tapping and clearance drill sizes for fluteless tap.
⢠Dimensions of common shank types
Now includes screwed shank, Weldon, DIN Taper, BT Taper, ISO Taper in addition to Morse taper shank details.
⢠Standards for engineering drawings
Comprehensive listing including contemporary listings and illustrations.
⢠Abbreviations used in engineering drawings
⢠Common CNC codes
Comprehensive listing including contemporary listings.
⢠Axis nomenclature for machine tools
Newly added page explaining the use of letter addresses to define directional motion.
⢠Trigonometry formulae
Colour coded CAD produced illustrations for quick reference.
⢠Sines and Cosines
Calculated to six decimal places with colour coded axes for quick reference.
⢠Tangents and Cotangents
Calculated to six decimal places with colour coded axes for quick reference.
⢠Co-ordinates for equally pitched holes
Clear and easy to read CAD produced diagrams.
⢠Bending allowances for malleable materials
Listed as metric radius and thickness with nearest equivalent SWG given for guidance. Clear and easy to read CAD produced diagrams.
⢠Cutting speed calculator
Gives required RPM for known cutter diameters and cutting speeds.
⢠Standard drill size conversions;
No & letter sizes integrated into a single chart, standard sizes are highlighted in bold text, size range extended from 25.25mm up to 32.50mm. All inch-fractional sizes converted to mm equivalent as well as inch-decimal and Morse Taper shank sizes are indicated against drill diameter ranges.
⢠Abbreviations and formulaes
Definitions of standard meanings with specific attention given to turning, milling and drilling.
Comprehensive list of commonly used abbreviations.
⢠Weight and measure systems, useful conversions and constants
A comprehensive listing of contemporary and old systems, along with the necessary conversion formulae.
