AB-250
Ultra Precision Saw Arbor for Carbide Slitting Saws
Arbor 0.25000-in ID, 0.5-in Shank Diameter,0.50000-in Flange Diameter, 2.875-in Shank & Flange Length
Ultra-precision screw-cap saw arbors for carbide slitting saws — inch AB and metric MSA lines, ground to tenths so thin carbide saws run true.
- Inch AB line: eight arbors from AB-250 (1/4") to AB-1250 (1-1/4"), including a long-shank AB-1000-1 (1" arbor on a 1" x 5" shank)
- Published cap-screw torque specs per size: AB-250 29 in-lb, AB-375 47 in-lb, AB-500 and AB-625 202 in-lb, AB-875 through AB-1000-1 415 in-lb, AB-1250 600 in-lb — screw and hex key included with every arbor
- Metric MSA line: six arbors from MSA-05 (5 mm) to MSA-22 (22 mm) on 75-100 mm shanks, with metric screw torques from 11 in-lb (M3) to 180 in-lb (M6)
- AB tolerances: inside diameter +.0001"/+.0003", shank diameter -.0001"/-.0003", cap diameter +.0000"/-.0002" — MSA holds inside diameter concentric to shank within .005 mm
- Total thickness of saws/spacers should not exceed 50% of cap length; arbor caps with longer cap length are available (excludes metric)
- RobbJack arbors are the tightest tolerances in the industry and hold less than .0002" runout
From the RobbJack Applications Guide.
About this series
AB Ultra-Precision Saw Arbors
Ultra-precision arbors for carbide slitting saws
RobbJack AB saw arbors are ultra-precision arbors for carbide slitting saws, ground to the tightest tolerances in the industry to solve many of the problems associated with using carbide slitting saws, including runout and slippage. Each arbor includes a flat-head or socket-head cap screw, published torque specs, and the matching hex key. AB arbors generally allow a deeper proper maximum depth of cut than NAB arbors for a given saw size.
- Tightest tolerances in the industry
- Includes cap screw and hex key sized to the arbor
- Published torque specs for each size
- Standard and extended-length replacement caps (CP/XCP) available
- Inside diameter held +.0001/+.0003
Sizes 1/4" through 1-1/4" (including 1" AB-1000-1). Uses CAPS (CP-AB / XCP-AB) replacement caps and steel FLANGES for precision slitting saw applications.
Headline spec
AB arbor tolerances: Inside Dia. +.0001/+.0003, Shank Dia. −.0001/−.0003, Cap Dia. +.0000/
Best for
- Carbide slitting saw applications
- Deeper depth-of-cut sawing vs. NAB for a given saw size
- Eliminating saw slippage and runout
Specifications
US machining terms with ISO 13399 codes.
- Holder DiameterDMM
- 0.5″
- Accessory Type
- Saw Arbor
- Overall Length (OAL)OAL
- 2.875″
- Included Screw
- 8-32 × 1" flat-head socket cap screw
- Screw Torque
- 29 in-lb
- Hex Key
- 3/32"
- Series
- AB — Ultra Precision Saw Arbor for Carbide Slitting Saws
Cuts these materials
See it run · 2 videos
Tolerances
| Type | Min | Max |
|---|---|---|
| Arbor Diameter | +0.0001 | +0.0003 |
| Cap Diameter | -0.002 | 0 |
| Cap Length | 0 | +0.06 |
| Cap Thickness | 0 | +0.06 |
| Flange Diameter | -0.003 | +0.003 |
| Overall Length | -0.06 | +0.06 |
| Shank Diameter | -0.0001 | -0.0003 |
Made & shipped in the USA · lead time confirmed at order. Buy at retail or through your distributor.
Performance guaranteed. Run it against the tool you use today — if it doesn't beat it, we'll make it right.
Adds Uncoated · $225.35 — our pick for your material. Choose another finish below.
Proven in the field
- $548,290saved per year drilling carbon-fiber aircraft
- $216,000saved per year trimming aircraft skins
- 1,000%metal-removal increase in Inconel 718 (SPS)
Finishes (1)
Uncoated
AB-250
$225.35
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$225.35
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More in the AB series
Same series, different size — what changes from this tool is shown in red.