Shanks and wheels for power tools
hex shanks
across [mm]
name flats tips
1/8" 3.175 3.66 common for fine "watch" screwdrive bits
1/4" 6.35 7.33 most common screwdriver bits, drill bits...
11???
.580" 14.7 17.2 hammer chisels
across corners = 1.1547*across flats ( = across flats / sin(60) )
square sockets
1/4"
3/8"
1/2"
milling bits, shank diameters
in in mm mm use
1/16 0.0625 1.6 1.5875 common dental burs (friction grip/FG); lengths: 16.5mm/FGSS, 19mm/FG, 21mm/FGL, 25mm/FG SURG
! 3/32 0.0938 2.3 2.35 dental burs (latch/RA, HP); lengths: 22mm/RA, 25mm/RA SURG(25), 34mm/RA SURG(34), 44.5mm/HP; small rotary tools, common Proxxon tool bits
3.0
! 1/8 0.125 3.2 3.175 very common size for small rotary tools
3/16 0.1875 4.8 4.76 5mm?
! 1/4 0.250 6 (?) 6.35 common for larger tools for power drills, milling machines
5/16 0.3125 8 (?) 7.94
3/8 0.375 9.5 9.525 10mm?
10
12
! 1/2 0.5 13 12.7 common reduced-size large drill bit shank
16
20
25
6mm
10mm
12mm
16mm
20mm
25mm
13mm standard reduced shank for drill bits, 1/2"
1/8" 3.175mm
1/4" 6.350mm
3/8" 9.525mm
1/2" 12.700mm
.315" 8.00mm
.500" 12.70mm
.750" 19.05mm
.680" 17.2mm (also, outer dia of .580" hex, or 14.7mm across flats) on chisels/hammers
for carbide:
2,3,4,5,6,8,10,12,16,20mm (equals tool diameter)
standard dental arbors
- shank: 3/32 or 1/8
- arbor hole capacity: 1/16, 1/8, 1/4
- head diameter: 3/16, 5/16, 3/8, 7/16
Proxxon collets
1.0mm
1.5mm
2.0mm
2.3mm for common 2.35mm(3/32") shanks
3.0mm
3.2mm for common 3.20mm(1/8") shanks
2.35mm carbide burrs: diameter 2.35mm (different shapes), 6mm (different shapes), 0.7..2.3 (cylindrical)
1/8" shank burrs: diameter 5/32, 3/16, 1/4
cordless chucks
1/4" 6.35mm
3/8" 10mm
1/2" 13mm
shaped shanks on drill bits
10mm SDS, SDS plus
18mm SDS Max
Discs, wheels, saws
angle grinder wheels
http://wiki.diyfaq.org.uk/index.php/Angle_grinder
https://www.roundforge.com/articles/angle-grinder-wheels-fabrication/
wheel diameter:
in mm use
1..1.5 25..38 dremel-class
4 100 3.93", rarer
! 4.5 115 most common DIY size; 11,000 rpm common
5 125 wall chasers
150
7 178/180
220
9 228/230 deep cutting; slower rpm, gyroscopic effect in handling
thickness:
cutting discs: 2.5mm thick (1mm for extra-thin)
3.2mm(1/8"), 0.045"(1.14mm)
grinding discs: 6mm (1/4")
inner dia, arbor mount
3/8-24
3/8-16
M10x1.25 thread on smaller tool arbors
M10(x1.5) thread on smaller tool arbors, tool wheels
M14 thread on some tool arbors, tool wheels
5/8 16mm on 100mm discs, some 125mm wire wheels
5/8-11 common arbor thread (Makita), on some grinding and wire discs
M16 arbor thread, some tool wheels
20mm some 100mm discs
7/8" 22.23mm common on 115,180,230mm discs
7/8-11 tthreaded arbor, some tool wheels
M10 some polisher backing pads
M14 some polisher backing pads
M16 some polisher backing pads
circular saws and grinder arbor holes
16 common on small
18
20 common
7/8 22.2 angle grinder standard, common on 4.5"/115mm wheels
24
30 common
1 1/4 32 31.75 6" metal slitting saw
blade dia
7.25" (184mm)
190mm
205mm
9" 230mm
10" 254mm
12" 305mm
14" 355mm
mounting nut
5/8-11 15.875mm often on threaded disc
M10
cutting wheel types:
type 1
grinder wheels:
in mm use
7" 180 toolroom grinding wheel
Threads: chucks, spindle adapters
The inch screw thread 9/32-40 inch is suitable for Original Dremel 4000, 400,3000, 398, 395, 300, 285, 275, 200, 100, 8200, 800, 780, 770, 7700, 750.
The metric thread is suitable for Hilda Grinder and other electric grinder which thread is 8×0.75mm.
!M8x0.75 - Dremel-like chuck/collet nut thread
!9/32"-40tpi - 7.14x0.635, Dremel chuck/collet nut thread - outer dia 7.14mm, pitch 0.635mm (on e.g. Dremel 4000)
M7x0.75 - slightly smaller
M6x0.75 - some small chucks, e.g 0.3-4mm, has converters to shafts, 2.35mm, 3.0mm
M12x1.25 - bigger chucks
5/16-24 - drill chucks, less common
!3/8-24 UNF - drill chucks, 1/4" hex adapters on ebay
!1/2-20 UNF - bigger drill chucks
5/8-16 UN - bigger drill chucks, less common
3/4-16
7/8-20
rotary power tools:
M6x1 rotary power tools - orbital sanders, metric standard, female (sometimes male) on arbor; see also 5/16-24; for Dremel-style attachments for chuck-mount 1/4-shafts
5/16-24 UNF rotary power tools - orbital sanders, US standard, female (rarely male) on arbor; see also M6, M8
M10 rotary power tools - metric standard, male on arbor; smaller sanding/polishing backig plates...; less common than M14
M10 on chainsaw gearwheels; also M14, M16
M14(x2) rotary power tools - metric standard, see also 5/8-11; male on arbor; most common on european angle grinders; wire brushes, sanding backing plates/grip plates...; 115,125,178mm discs
M14 on chainsaw gearwheels; also M10, M16
5/8-11 UNC rotary power tools - US standard, see also M14; male on arbor; most common on US angle grinders; wire brushes, rubber sandpaper backing plates/grip plates...; 115,125,178mm discs
M16 rotary power tools - metric standard, male on arbor; wire brushes, sanding/polishing backig plates...; less common than M14
M16 on chainsaw gearwheels; also M14, M16
M8 rotary tools - backing pads, brushes, female on arbor, see also 5/16-24
M10x1.25 rotary tools - backing pads, brushes, European small, 100mm discs, male on arbor, less common than M10x1.5
M10x1.5 rotary tools - backing pads, brushes, European small, 115mm discs, male on arbor, see also M10x1.25, less common than M14x2
M14x1.5 rotary tools - backing pads for fibre discs, less common than M14x2
1/4-28 rotary power tool attachments; male on arbor, small Dremel style attachments
1/4-20 arbor for small hole saws, male on arbor (also 5/8-18, 1/2-20)
3/8-24 UNF rotary power tool attachments
1/2-20 arbor for hole saws, very common (also 5/8-18)
1/2-13
5/8-18 arbor for hole saws, most common (also 1/2-20)
1.1/4-8
1.1/2-8
10-32 threaded shanks of aircraft drill bits, up to 3/8" (also 1/4-28, 3/8-24, 7/16-24)
1/4-28 threaded shanks of some drill bits, reamers, core drills, gun barrel drills, countersinks (also 10-32, 3/8-24, 7/16-24)
3/8-24 threaded shanks of reamers, countersinks (also 10-32, 1/4-28, 7/16-24)
7/16-24 threaded shanks of reamers, countersinks (also 10-32, 1/4-28, 3/8-24)
metric arbor
M10
M8
M6
M5
M4
M3
http://aisystemsusa.com/docs/MISTcatalog2010.pdf
standard shank diameters
5/64 1.98mm
0.086 2.18mm
3/32 2.38mm
1/8 3.175mm
0.170 4.32mm
3/16 4.76mm
1/4 6.35mm
larger:
3/8 9.525mm
1/2 12.70mm
5/8 15.875mm
3/4 19.05mm
3/32
1/8
5/32
3/16
1/4
5/16
3/8
hole saws
https://docs.rs-online.com/e731/0900766b81500403.pdf
5/16-24 3/8..1.1/4
1/2-20 1.5/16..4.1/2
6.5mm arbor 14..30mm
9.5mm arbor 32..152mm
hole saw shanks
1/4 round
11/32 round
3/8 hex
3/8 triangle
7/16 hex
7/16 round
SDS Plus
1/4-20 on 1/4 shanks, rare
1/2-20 on 3/8 and 7/16 shanks
5/8-18 on 7/16 shanks
blade saw side holes
(holes/diameter/distance ("bolt circle"))
2/6/32 16mm, 20mm center hole
2/7/42 25mm, 30mm center hole
2/9.5/46.5
2/10/60
PH02 30mm center hole (oval-ish holes, for combination of pins)
https://www.stilesmachinery.com/files/assets/files/1525900389_Stiles_MSS-May2018_SawBladeFundamentals.pdf
combi3: center hole dia 30mm https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcRy6LeN_I2L2eraOhbLUGCgKtkSIQvsp-Pg8C-3tmykQ_AshKL0
2/7/42
2/9/46.4
2/10/60
combi5: center hole dia 80mm
2/7/110
2/8.4/130
2/14/110
4/9/100
4/19/120
combi7: center hole dia 60mm
2/10/80
1/11/85
2/11/115
2/11/148
2/14/100
2/14/125
2/19/120
combination of 3: (PH02?) center hole dia 20 or 22 or 30 mm; https://www.geocaching.com/geocache/GC3YY7X_kotoucova-03?guid=8c7642c8-0537-45b1-b401-f07f9625f167
2/7/42 + 2/9/46.4 + 2/10/60 united to deformed-keyhole shape, 3 most common holes on
2/7/42, center dia 18/20/30mm: on handheld circular saws
some examples: https://www.woodtechtooling.com/FreudTooling/CommercialSawblades/ToolTips/FreudSawBladep16.html
2/6/42
2/10/80
2/11/63
2/7/42 + 2/10/60 united to keyhole shape
2/8.5/110
3/11/70
3/15/80
4/8.5/185
2/6/42 + 2/10/60 in 90deg offset
6/7/200
4/9/100 + 2/9/110 in 45deg offset
3/7/66 + 3/9/72
10/8.5/170
10/8.5/215
saw arbor hole diameters:
3/8, 1/2, 5/8, 3/4, 7/8, 1"
spot-buff: 1/4-20, 5/16-24, M6x1
Threads
threads on arbors, tooling heads, collets
lathe chuck adapters
https://www.oliverswoodturning.co.uk/product/patriot-chuck-thread-adaptors-2/
M18x2.5
M20x1.5
M20x2
M24x3
M25x2
M30x1.5
M30x2.5
M38x3
3/4-16 UNF
3/4-10 BSW
7/8-16
7/8-12 left
1-12
1-10 BSF
1-10 BSF left
1-8 UNC
1.1/8-12
1.1/4-8
5/8 bore
various
on MTx arbors:
M8x0.75
M12x1 small lathe chucks
M14x1 small lathe chucks, drill chucks, boring heads
M16x1.5 boring heads
1.5-18 boring heads
3/8-24
1/2-20
M20x1.5 converter to M33x3.5
M22x1.25 - for boring heads
M33x3.5 lathe chuck
converters:
M20x1.5 to M33x3.5
1-8 to M33x3.5
M16x1.5 - bigger drill chucks, less common
M16x2 - some drill chucks, uncommon
M20x2
M22x1.25
M22x2 - arbor mounts for masonry core drills
5/8-11 - pull stud retention knob for CAT40 tooling head
3/4-10 - pull stud retention knob for some tooling heads
1-8 - pull stud retention knob for CAT50 tooling head
7/8-14 - milling machine arbor nut
1-14 - milling machine arbor nut
1.1/4-12 - milling machine arbor nut
1.1/2-12 - milling machine arbor nut
2-12 - milling machine arbor nut
2.1/2-12 - milling machine arbor nut
3/8-16 Whitw(?) - collet chuck drawbar end on straight-shank ER11/ER16/ER20/ER25, Morse-taper MT2 ER20/ER25, tapers MT2, MT3
1/2-13 - collet chuck drawbar end on straight-shank ER32/ER40, Morse-taper MT3 ER32/ER40, NST-shank ER32/ER40, tapers MT3
5/8-11 - collet chuck drawbar end on straight-shank ER32/ER40, Morse-taper MT4 ER40, NST-shank ER40, ISO40,
7/16-20 UNF - collet chuck drawbar end on R8-shank ER32/ER40
M6 - drawbar on MT1 taper
M7x0.75 - drawbar on B6 arbor
M10 - drawbar on MT2 taper
M12 - drawbar on MT3, BT30 taper
7/8-20 - on boring heads/shanks (also 1.1/2-18)
1.1/2-18 - on boring heads/shanks (also 7/8-20)
M14x0.75 - ER11 collet nut
M14x1
M14 - velcro sandpaper holder tool shaft
M16x1 - pull stud tool holders, retention knobs for chucks and arbors
M22x2 - shank arbors for larger diamond core drill bits/hole saws
M24x1.5 - some lathes?
M30x1.5 - chuck MK2 for collets ER32
M33x3.5 - some woodworking lathe headstocks, also left thread
M33x3.5 - some woodworking lathe collet chucks
M39x4 - some woodworking lathe headstocks, also left thread
3/4-16 - some woodworking lathe collet chucks
1-8 - some woodworking lathe collet chucks
1.1/4-8 - some woodworking lathe collet chucks
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