Toolholding accessories
The holding is half the cut.
Saw arbors that grip 15× harder and end mill extensions that reach without chatter.
15×
gripping force vs. typical arbors
.0002"
TIR or better
200%
more saw performance with thru-coolant
A saw or end mill is only as good as what's holding it. RobbJack's NAB ultra-precision arbors grip a slitting saw with 15× the force of a typical arbor and hold .0002" TIR — and the thru-coolant version feeds coolant to both faces of the saw right at the cut, worth up to 200% more performance.
For deep reach, ACH extension holders carry a carbide shank end mill out past obstructions without the chatter of a long-flute tool — available in inch and metric bores. Classic keyed AB arbors and ER collet arbors round out the lineup.
Why it wins
- NAB ultra-precision saw arbors — plain and thru-coolant versions.
- Thru-coolant delivery to both saw faces, right at the cut.
- Classic AB arbors with keyway drive for positive engagement.
- SA-ER collet arbors for quick size changes at .0002" TIR.
- ACH end mill extension holders in inch and metric bores.
Best for
Slitting & slottingDeep-reach millingHigh-speed saw workAny machining center
80+ arbors & extensions — start here
See all in the Tool Finder →- AB-1000Arbor 1.00000-in ID, 0.75-in Shank Diameter, 1.50000-in Flange Diameter, 4-in Shank & Flange Length
- AB-1000-1Arbor 1.00000-in ID, 1-in Shank Diameter,1.50000-in Flange Diameter, 5-in Shank & Flange Length
- AB-1250Arbor 1.25000-in ID, 1-in Shank Diameter,1.75000-in Flange Diameter, 5-in Shank & Flange Length
- AB-250Arbor 0.25000-in ID, 0.5-in Shank Diameter,0.50000-in Flange Diameter, 2.875-in Shank & Flange Length
- AB-375Arbor 0.37500-in ID, 0.5-in Shank Diameter,0.62500-in Flange Diameter, 2.875-in Shank & Flange Length
- AB-500Arbor 0.50000-in ID, 0.5-in Shank Diameter,0.75000-in Flange Diameter, 2.875-in Shank & Flange Length
- AB-625Arbor 0.62500-in ID, 0.75-in Shank Diameter,1.00000-in Flange Diameter, 4-in Shank & Flange Length
- AB-875Arbor 0.87500-in ID, 0.75-in Shank Diameter,1.25000-in Flange Diameter, 4-in Shank & Flange Length
- ACH-03Accuhold Extension Holder 0.0937in ID, 0.375in Shank, 2.125in OAL, 5-40 Screw
- ACH-04Accuhold End Mill Extension Holder 0.12500-in ID, 0.375-in OD, 3.25-in OAL
- ACH-04-LAccuhold Extension Holder 0.125in ID, 0.375in Shank, 6in OAL, 8-32 Screw
- ACH-05Accuhold Extension Holder 0.1562in ID, 0.5in Shank, 3.5in OAL, 8-32 Screw
- ACH-06Accuhold End Mill Extension Holder 0.18750-in ID, 0.5-in OD, 3.5-in OAL
- ACH-06-LAccuhold Extension Holder 0.1875in ID, 0.5in Shank, 5in OAL, 8-32 Screw
- ACH-08Accuhold End Mill Extension Holder 0.25000-in ID, 0.625-in OD, 4.25-in OAL
- ACH-08-LAccuhold Extension Holder 0.25in ID, 0.625in Shank, 6in OAL, 10-32 Screw
- ACH-10Accuhold Extension Holder 0.3125in ID, 0.75in Shank, 4.5in OAL, 1/4-28 Screw
- ACH-12Accuhold End Mill Extension Holder 0.37500-in ID, 0.75-in OD, 4.5-in OAL
- ACH-12-LAccuhold Extension Holder 0.375in ID, 0.75in Shank, 6in OAL, 5/16-24 Screw
- ACH-14Accuhold Extension Holder 0.4375in ID, 0.75in Shank, 4.5in OAL, 5/16-24 Screw
- ACH-16Accuhold End Mill Extension Holder 0.50000-in ID, 0.75-in OD, 4.75-in OAL, 1in dia x 1.5in long head
- ACH-16-32-LAccuhold Extension Holder 0.5in ID, 1in Shank, 6in OAL, 3/8-24 Screw
- ACH-16LAccuhold End Mill Extension Holder 0.50000-in ID, 1-in OD, 4.75-in OAL
- ACH-18Accuhold Extension Holder 0.5625in ID, 1in Shank, 5.25in OAL, 3/8-24 Screw
Put a RobbJack arbors & extension to work.
Browse the line in the Tool Finder, or let our engineers spec it for your part.