Deep slitting cuts drown in their own chips.Flush them out — at the blade.
A slitting saw runs buried in a slot the same width as the blade. Flood coolant sprays the outside of the cut and never reaches the bottom of the kerf — so chips pack, get recut, weld to the teeth, and snap thin saws. The NAB-TC arbor delivers coolant through the arbor to both faces of the saw, flushing the kerf where the cutting actually happens.
NAB-TC arbor with cutaway: internal coolant path (blue) exits along both saw faces.
- 15X
- gripping force — the saw doesn't slip
- 7 sizes
- .375" to 1.25" saw ID
- Up to 200%
- more saw performance with thru-coolant
Why good saws die in deep slots
Slitting is the one milling operation where the tool works completely enclosed by the part. Three things kill saws in that slot — and all three trace back to coolant that never reaches the cut.
Chips pack the kerf
The slot is the same width as the blade, so chips have nowhere to go. Packed chips get recut, load the gullets, and push the saw off line — wandering cuts and blown tolerances.
Heat builds where coolant can't reach
Outside flood coolant is stripped off at the mouth of the slot. At the bottom of the kerf the saw runs dry, chips weld to the teeth, and built-up edge tears the finish.
Thin saws snap without warning
A recut chip jammed between a thin carbide saw and the slot wall is how saws break mid-cut. Every jammed chip is a shock load a .010" blade wasn't built to absorb.
Coolant grooves feed both faces of the saw
Run through-spindle coolant into the NAB-TC arbor and it exits through machined coolant grooves along the thru-coolant flanges — washing both sides of the blade and carrying chips out of the kerf continuously. The same precision-ground arbor grips the saw with 15X the force of a typical arbor, so the blade drives through the cut instead of slipping on it. Cooler blade, clean kerf, and the confidence to push speeds and feeds.
- Coolant delivered at the blade, both faces
- 15X gripping force — no saw slip under load
- Precision rigid arbor body, ground in the USA
- Thru-coolant steel flanges + spacer set included
Watch the coolant reach the cut
Seven sizes. Every common saw bore, .375" to 1.25".
Ultra Precision Thru-Coolant Saw Arbors for carbide slitting saws — pick your saw's inside diameter. Every arbor page has full specs, CAD, and direct ordering.
From $628.75
| Arbor | Saw ID | Shank Ø | Flange Ø | Length | Price from | View tool |
|---|---|---|---|---|---|---|
| NAB-375-TC | .375" | .625" | .71" | 2.4" | $628.75 | View |
| NAB-500-TC | .5" | .75" | .855" | 3" | $684.55 | View |
| NAB-625-TC | .625" | .875" | 1" | 3.15" | $866.05 | View |
| NAB-750-TC | .75" | 1" | 1.215" | 3.4" | $753.85 | View |
| NAB-875-TC | .875" | 1" | 1.434" | 3.4" | $935.95 | View |
| NAB-1000-TC | 1" | 1" | 1.48" | 3.4" | $1,047.75 | View |
| NAB-1250-TC | 1.25" | 1.25" | 2" | 3.5" | $1,243.30 | View |
Thru-coolant flanges
Two steel thru-coolant flanges included with every arbor — the coolant grooves that feed the blade faces.
Spacer set included
Precision spacers to position the saw along the arbor come in the box.
Spec'd clamp torque
Each size carries a published clamping torque (300–600 in-lb by size) — repeatable setups, full grip.
Keyway on request
Removable keyway available on most sizes for positive drive — see each tool page.
Recommended upgrade
Step up to solid carbide thru-coolant flanges
Every arbor ships with steel thru-coolant flanges. For production slitting we recommend the CF solid carbide flange upgrade— the clamping faces that actually hold your saw flat. Steel flanges wear, pick up burrs, and scratch the saw over repeated setups; carbide flanges don't wear, burr, or scratch, so the clamping faces stay flat and true and the setup stays repeatable run after run — the same reason our gang-slitting stacks are built on carbide flanges and spacers.
Sold in pairs, sized for every NAB-TC bore (.375" to 1.25"), with the same thru-coolant grooves.
Cutting dry? The standard NAB arbor line is the same ultra precision, 15X-grip arbor without the coolant path — the right pick for dry and minimum-lubricant slitting.
The arbor is half the system. The saw is the other half.
RobbJack solid carbide slitting saws are more rigid and heat-stable than steel-bodied saws — and every .0001" thickness from .002" to .250" is a standard part, no special quote needed. Match the bore to your NAB-TC arbor, dial in speeds and feeds with real RobbJack data, and run the whole setup wet.
Cutting deep? Pair the thru-coolant arbor with a K-series saw. RobbJack's guidance: when your depth of cut is more than 3× the saw thickness, run the K-series deep-slot saw — its geometry is built for buried cuts, exactly where at-the-blade coolant matters most. The saw calculator picks C- vs K-series for your cut automatically and matches the thru-coolant arbor to the bore.
Tell us about the slot. We'll spec the arbor and the saw.
Material, slot depth, thickness, and your machine's coolant setup — a RobbJack saw application engineer will spec the arbor, the saw, and the speeds & feeds to run it. Call (800) 527-8883 or send the application.
Prefer to prove it first? Try a test tool — performance guaranteed.