Sumitomo General Catalog 2025-2026

Replaceable Tip Drills SMD Series

Web thinning with excellent centering MTL Suitable for high-efciency drilling of general steel X-Type Thinning DEX Coating

Ɣ Excellent cutting edge strength Large edge treatment reduces breakage of the cutting edge. Ɣ Stable machined hole accuracy X Type thinning achieves excellent centering on entry and stable drilling.

Large cutting edge treatment

Strong peripheral edge

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Ŷ Application Examples: MTL

Ŷ Drilling Precision

Tool Life (pcs)

Bore Diameter (inch)

Efficiency (%)

High drilling accuracy even with large diameters Part Material : Structural Steel Plate (base substrate for construction machinery) Drill Size : ø1.2992”, 5XD Cutting Conditions : v c =393 SFM f =0.0098 IPR Cutting Environment : Emulsion

Improved tool life and efciency

Tool life Efficiency

Performance Comparison

ø 1.305 ø 1.295 ø 1.297 ø 1.299 ø 1.301 ø 1.303 ø 1.293

100 120 140 160 180

200 190 180 170 160

Measured Point (1) Measured Point (2)

(1) (2)

Part Material : Housing Mild Steel Drill Size : .5905”, 5XD Cutting Conditions : v c =351 SFM

185 holes

f =0.0118 IPR

Exit

170 holes

140 %

Hole Depth : 1.26” × 12 holes

Entrance

100 %

Competitor's Indexable Drill

MTL

EntranceIntermediate Exit

MTL-C Chamfered edges to eliminate break out in cast iron

X-Type Thinning

Ɣ 45º corner chamfer on diameter Large thinning angle prevents breakage at the convex R-profile portion, particularly when drilling soft steel and it also reduces breakages caused by adhesion when drilling stainless steel. Ɣ Improved chipping resistance in cast iron Better edge sharpness at the peripheral edge prevents chipping around the hole openings when drilling cast iron. Ɣ Minimizes burr and chipping at hole exit Ɣ Reduces wear on corner

DEX Coating

Web thinning with excellent centering

large edge treatment

MEL

Strong peripheral cutting edge

Large web thinning angle Suitable for exotic alloys, stainless steel, mild steel, gray cast iron and low rigidity equipment Ɣ Excellent cutting edge design for SUS and mild steel (SS, etc.) Large thinning angle solves the convex corner breakage issues specic to mild steel and reduces adhesion breakages with SUS. Ɣ Improved edge chipping resistance in cast iron Edge sharpness improvements in peripheral areas prevent edge chipping around hole openings in cast iron.

DEX Coating

Overlap Thinning

Small edge treatment Sharp peripheral edge

Ŷ 25% reduction in cutting force (thrust) Ɣ The MEL features 25% lower thrust than the MTL!

Ŷ Application Examples (MEL)

MEL (Cutting Length 49ft)

Competitor's Product (Cutting Length 36ft)

3,000 2,500 2,000 1,500 1,000 500 0

Breakage in Center

MEL MTL

Part Material: Carbon Steel O.D.: ø0.551” Cutting Conditions: v c =262 SFM

Competitor's indexable drill exhibited poor centering and produced rie marks. The center of the drill broke after 36ft of drilling.

MEL has excellent centering, produces no rie marks and no cutting edge breakage after 49ft.

f =0.006

f =0.008 FeedRate: f (IPR)

f =0.010

Sharper blade type and thinning overlap signicantly reduce thrust and improve chip control, allowing stable drilling in low-rigidity setups.

Part Material: 304 Stainless Steel, Drill size: ø0.551” 5XD Cutting Conditions: v c =197 SFM, f =0.006”, Coolant: Emulsion

NAL

DLC Coated for non-ferrous and aluminum alloys

see next page for details

Ɣ +LJKHIILFLHQF\GULOOLQJRI1RQIHUURXV0DWHULDOV Very sharp cutting edge combined with DLC Aurora coating creates: Anti-adhesion, low cutting forces, and stable chip evacuation.

DLC Aurora Coating

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