Side-by-Side Comparison
Tool Drives & Bit Shanks
Circular Saw Arbors & Blades vs. Drill Bit Shank Types & Sizing
Comparing 2 standards across 13 specifications. 13 key differences identified.
Comparing:
Circular Saw Arbors & Blades
Drill Bit Shank Types & Sizing
Circular saw blade arbors (center mounting bore holes) are standardized into 5/8-inch (15.88 mm with diamond knockout for worm-drive saws), 1-inch (25.4 mm for table/miter saws), 20 mm, and 30 mm (European standard), paired with Alternate Top Bevel (ATB) or Triple Chip Grind (TCG) tooth geometries.
Drill bit shanks are standardized under ISO 296, DIN 338, and proprietary power tool systems into Straight Round Shanks, 1/4" Quick-Change Hex Shanks (ISO 1173), SDS-Plus (10 mm / 2-groove), SDS-Max (18 mm / 3-groove), and Morse Taper (MT1–MT5) industrial spindle shanks.
Specification Comparison Table
13 Parameters| Parameter / Spec | ||
|---|---|---|
|
Governing Standards
|
ANSI B7.1 / EN 847-1 / ISO 293 / OSHA 1926.304 | ISO 1173 / ISO 296 / DIN 338 / Bosch SDS Standard |
|
7-1/4" Circular Saw Arbor
|
5/8" (15.875 mm) round bore with diamond knockout insert (worm-drive framing saws) | — |
|
10" / 12" Table & Miter Saw Arbor
|
5/8" (10-inch North American) or 1.00" (25.4 mm 12-inch heavy-duty saws) | — |
|
European Standard Arbor (EN 847)
|
20.0 mm (cordless/plunge saws) and 30.0 mm (stationary table & panel saws) | — |
|
Standard Kerf Thickness
|
Full Kerf: 1/8" (3.18 mm) | Thin Kerf: 3/32" (2.38 mm for cordless power savings) | — |
|
ATB Tooth Grind
|
Alternate Top Bevel (15°–20° bevel) | Clean cross-cutting across wood grain | — |
|
TCG Tooth Grind
|
Triple Chip Grind (trapezoidal tooth + flat raker) | Melamine, laminates, non-ferrous aluminum | — |
|
Straight Round Shank
|
— | Universal smooth cylindrical shank held in 3-jaw keyed or keyless chucks (0.5 mm to 13.0 mm / 1/2") |
|
1/4-Inch Hex Shank (Form E 6.3)
|
— | 6.35 mm (1/4") with power ball detent groove (ISO 1173 Form E 6.3) | Prevents bit spin-out in impact drivers |
|
SDS-Plus Shank (10 mm)
|
— | 10 mm diameter shank with 2 open drive splines + 2 closed ball-locking grooves | Rotary hammers up to 4 kg |
|
SDS-Max Shank (18 mm)
|
— | 18 mm diameter heavy-duty shank with 3 open splines | Heavy demolition hammers and core drilling (5+ kg) |
|
Morse Taper 2 (MT2)
|
— | Taper 1:20.020 | Large diameter: 17.780 mm (0.700") | Drill presses, metal lathes, magnetic base drills |
|
Morse Taper 3 (MT3)
|
— | Taper 1:19.922 | Large diameter: 23.825 mm (0.938") | Industrial radial arm drills |