Side-by-Side Comparison
Tool Drives & Bit Shanks
Circular Saw Arbors & Blades vs. Router & Tool Collet Sizes
Comparing 2 standards across 14 specifications. 14 key differences identified.
Comparing:
Circular Saw Arbors & Blades
Router & Tool Collet Sizes
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.
Woodworking router collets and CNC machining spindles use precision slotted spring chucks standardized into fractional inch (1/4", 1/2") and metric (6 mm, 8 mm, 12 mm) wood router standards, alongside industrial ER Collets (ER11 to ER40, DIN 6499) with radial runout tolerances under 0.005 mm.
Specification Comparison Table
14 Parameters| Parameter / Spec | ||
|---|---|---|
|
Governing Standards
|
ANSI B7.1 / EN 847-1 / ISO 293 / OSHA 1926.304 | DIN ISO 15488 (ER Collets) / DIN 6499 / ANSI Standards |
|
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 | — |
|
1/4-Inch Router Collet (6.35 mm)
|
— | Standard on trim routers and compact palm routers (up to 1.25 HP) | Light edge profiling |
|
1/2-Inch Router Collet (12.70 mm)
|
— | Standard on full-size plunge and table routers (2.25 HP to 3.25 HP) | 4× higher torsional rigidity than 1/4" |
|
Metric Router Standards (EU/UK)
|
— | 6 mm, 8 mm, 12 mm collet sleeves (8mm is popular for European mid-size plunge routers) |
|
ER11 Collet (CNC)
|
— | Outer Dia: 11.5 mm | Length: 18.0 mm | Clamping Range: 0.5 mm to 7.0 mm (Hobby/Desktop CNC) |
|
ER20 Collet (CNC)
|
— | Outer Dia: 21.0 mm | Length: 31.5 mm | Clamping Range: 1.0 mm to 13.0 mm (2.2 kW Spindles) |
|
ER32 Collet (Industrial)
|
— | Outer Dia: 33.0 mm | Length: 40.0 mm | Clamping Range: 2.0 mm to 20.0 mm (Production VMC Milling) |
|
Maximum Total Runout (TIR)
|
— | Standard Grade: ≤ 0.015 mm (0.0006") | Precision Grade (UP): ≤ 0.005 mm (0.0002") |