M20-1000-05-20
20mm Diameter 5mm Arbor 20 Teeth Solid Carbide Saw Tough Material
20mm Diam. Slitting Saw, 1mm Thick, 5mm ID, 20 teeth

Cutting deep slots? For slots deeper than 3× the saw thickness, the K-Series double-concavity version cuts cleaner and lasts longer. View the K-Series version (MK20-1000-05-20) →
About this series
Solid Carbide Slitting Saws
Tight widths and finishes HSS can't hold.

RobbJack solid carbide slitting saws are ground to ANY thickness up to 0.250" in 0.0001" increments — the listing shows common price-break thicknesses, but every size in between is standard. Coarse-pitch teeth suit non-ferrous materials and fine-pitch suit ferrous; standard-concavity covers general use, while K-series double-concavity, alternate-tooth-chamfer versions handle deep cuts.
- Any thickness up to 0.250" in 0.0001" increments — every size between the listed price breaks is standard
- Minimum thickness by diameter: 0.002" (3/4"–1"), 0.004" (1¼"–2"), 0.006" (2¼"–4"); K-series 0.020"
- Coarse pitch for non-ferrous, fine pitch for ferrous
- Standard and K-series double-concavity / alternate-tooth-chamfer versions
- Optional T-Process, hub, keyway and PVD coatings
- Thru-coolant saw systems available on NAB / AB arbors with CF flanges
Mounts on AB and NAB saw arbors. Choose K-series double-concavity saws for slots deeper than 3× the saw thickness.
Headline spec
Thickness tol +.0002/−.0000; diameter +.002/−.000
Best for
- Slotting & parting
- Tight-tolerance widths
- Ferrous & non-ferrous
Compatible saw arbors · 5 mm bore
MSA-05RecommendedMetric ultra-precision saw arbor · 11.999 mm shank
Max DOC *
2.73 mm

ER-collet integrated saw arbor — taper-mount rigidity · 8.001 mm shank
Max DOC *
4.729 mm

ER-collet integrated saw arbor — taper-mount rigidity · 8.001 mm shank
Max DOC *
4.729 mm

ER-collet integrated saw arbor — taper-mount rigidity · 8.001 mm shank
Max DOC *
4.729 mm

ER-collet integrated saw arbor — taper-mount rigidity · 8.001 mm shank
Max DOC *
4.729 mm

ER-collet integrated saw arbor — taper-mount rigidity · 9.5 mm shank
Max DOC *
3.98 mm

ER-collet integrated saw arbor — taper-mount rigidity · 9.5 mm shank
Max DOC *
3.98 mm

ER-collet integrated saw arbor — taper-mount rigidity · 9.53 mm shank
Max DOC *
3.98 mm

ER-collet integrated saw arbor — taper-mount rigidity · 9.53 mm shank
Max DOC *
3.98 mm
Arbors that fit this saw's 5 mmarbor hole, recommended order first. * Max depth of cut = (saw diameter − arbor flange) ÷ 2, less a 0.050″ clearance cushion. Verify for your setup.
Specifications
US machining terms with ISO 13399 codes.
- DiameterDC
- 20 mm
- Saw Thickness
- 1 mm
- Arbor Diameter
- 5 mm
- Number of TeethNOF
- 20
- Max Depth of Cut (MSA-05) *
- 2.718 mm
- Cuts
- Titanium, Cast Iron, Steel, Stainless, Super Alloys
- Series
- M20-05-20 — 20mm Diameter 5mm Arbor 20 Teeth Solid Carbide Saw Tough Material
* Max depth of cut = (saw diameter − arbor flange) ÷ 2, less a 0.050″ clearance cushion. See per-arbor values below.
Cuts these materials
Features
See it run · 4 videos
Tolerances
| Type | Min | Max |
|---|---|---|
| Arbor Diameter | +0.005 | +0.01 |
| Concavity | +0.01 | 0 |
| Outside Diameter | +0.05 | 0 |
| Thickness | +0.005 | 0 |
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 · $61.45 — 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)
Need an in-between thickness?
Any thickness between this family's standard sizes is a standard order, not a special — the part number carries your exact thickness, priced as the next thicker catalog saw.
Finishes (1)
Uncoated
M20-1000-05-20
$61.45
Available to order
Volume pricing
| Qty | Unit price |
|---|---|
| 3+ | $58.38 |
| 7+ | $55.31 |
| 25+ | $52.23 |
List price per unit · Uncoated. Coated finishes priced higher.
Starting at
$61.45
Performance guaranteed

Thru-Coolant NAB Precision Saw Arbor
Slitting saws fail when coolant can't reach the cut — external flood gets blocked by fixturing and part geometry. The NAB arbor delivers coolant through the center and out through thru-coolant flanges onto both faces of every saw— equal pressure, right where the cut happens. Precision-ground to 25 millionths and grips the saw up to 15× more tightly — so it can't slip or spin on the arbor — for faster speeds & feeds, no walking, and far longer tool life.
- 0.000025″
- tolerance — 25 millionths
- 15×
- grip on the saw vs. a typical arbor
- ≈80%
- fewer causes of saw failure
- ↑ S&F
- faster speeds & feeds, longer life
Recommended for your 0.1968″ bore saw
Contact application engineering for the thru-coolant arbor that fits this saw bore.
Thru-coolant flanges are required. Add thru-coolant spacers to gang multiple saws. Solid carbide flanges last a lifetime and eliminate the burrs & scratches of steel.
Available in any thickness — 0.002″ to 0.2362″
This saw is stocked in 15 standard thicknesses, but any thickness between 0.002″ and 0.2362″ is a standard order, not a special — you order in ten-thousandths of an inch and RobbJack grinds it, priced as the next thicker catalog size. Thickness is held to +.0002″/−.0000″, and the part number carries your exact thickness. Enter your size in the in-between thickness panel above to get the part number and price. Saws thinner than .010″ are specials and non-returnable; most thicknesses from .008″ to .250″ ship within about 48 hours.
More in the M20-05-20 series
Same series, different size — what changes from this tool is shown in red.
- M20-0050-05-20$229.000.05 mm thickØ 20 mm20T5 mm bore
- M20-0100-05-20$183.700.1 mm thickØ 20 mm20T5 mm bore
- M20-0150-05-20$123.300.15 mm thickØ 20 mm20T5 mm bore
- M20-0200-05-20$107.150.2 mm thickØ 20 mm20T5 mm bore
- M20-0400-05-20$85.950.4 mm thickØ 20 mm20T5 mm bore
- M20-0600-05-20$73.150.6 mm thickØ 20 mm20T5 mm bore
- M20-1200-05-20$73.301.2 mm thickØ 20 mm20T5 mm bore
- M20-1600-05-20$73.301.6 mm thickØ 20 mm20T5 mm bore
- M20-2000-05-20$94.752 mm thickØ 20 mm20T5 mm bore
- M20-2500-05-20$107.752.5 mm thickØ 20 mm20T5 mm bore
- M20-3000-05-20$136.853 mm thickØ 20 mm20T5 mm bore
- M20-4000-05-20$183.004 mm thickØ 20 mm20T5 mm bore