Replaceable Tip Drills SMD Series
Web thinning with excellent centering MTL Suitable for high-ef ciency 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 ef ciency
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 %
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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 speci c 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 ri e marks. The center of the drill broke after 36ft of drilling.
MEL has excellent centering, produces no ri e 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 signi cantly 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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