Replaceable Tip Drills SMD Type
■ Product Range List
Mounted
Tip
Holder (L/D) Applications
ø D
c range
Front screw clamp design
Radial serration provides steady and precise clamping
ø0.4688" to ø1.2125" (ø12.0 to ø30.8mm) ø0.4688" to ø1.6732" (ø12.0 to ø42.5mm) ø0.4688" to ø1.6732" (ø12.0 to ø42.5mm) ø0.5315" to ø1.6732" (ø13.5 to ø42.5mm) ø0.5315" to ø1.0157" (ø13.5 to ø25.8mm) ø0.4688" to ø1.2125" (ø12.0 to ø30.8mm) ø0.4688" to ø1.2125" (ø12.0 to ø30.8mm) ø0.4688" to ø1.2125" (ø12.0 to ø30.8mm) ø0.5315" to ø1.2125" ( ø13.5 to ø30.8mm) ø0.5315" to ø1.0157" (ø13.5 to ø25.8mm) ø0.4688" to ø1.2125" (ø12.0 to ø30.8mm)
S M L D
(1.5D)
Head
(3D)
General Steel
Type MTL
Indexable head
(5D)
Specially surface-treated body for high wear and rust resistance
MultiDrill design + dedicated coated grades
(8D)
12D (12D)
Oil holes are directed at cutting lip and chips
Holders
S
(1.5D)
Ŷ Features
M
(3D)
Stainless Steel, Super Alloy, Cast Iron
J
Indexable type drill with exchangeable drill head, which has a radial serration design, for high precision and strength. An exchangeable drill head provides a new cutting edge, higher productivity and cost efficiency with easy tool management. Regrinding allowance of 0.059” to 0.118” ( 1.5mm to 3mm ) makes further tool cost reductions possible. * Regrinding is available only for MTL/MEL/MB Type
Type MEL
Indexable head
L
(5D)
D
(8D)
12D (12D)
Indexable head Type MFS S
(1.5D) Spot Facing
*MFS Type can also be used with M Type, L Type, D Type and 12D Type holders.
Ŷ Tool Life and Cost Ɣ Comparison of tool life
Ɣ Total tool comparison when machining 1,000 workpieces
Ɣ Conclusion
100%
(1) Dedicated coating and substrate
Shorter tool change time! MTL Type has double the tool life of brazed drills!
For regrinding purposes, brazed drills are only used for 50-70% of their actual tool life potential. SEC-MultiDrill MTL Type reaches 100%!
Regrindable (x4)
(2) With regrinding not required,
New Drill
the tool can be used until maximum wear occurs.
Regrindable (x4)
2 times the tool life!
120
Reduced costs!
New Drill
Drill tolerance and tool life
100
Regrindable (x4)
Ɣ Workpiece Example
are relatively low after regrinding
50%
80
New Drill
10 drill heads
60
Bore dia.: ø0.709”, depth: 1.97”
Regrindable (x4)
40
New Drill
SEC-MultiDrill MTL Type Insert: SMDT 1800MTL Holder: SMDH 180M Part Material: Machine component Carbon Steel Wet
Regrindable (x4)
Holders
20
New Drill
0
0
SEC-MultiDrill MTL Type
Brazed Drill
SEC-MultiDrill MTL Type
Brazed Drill
Drilling Precision Ŷ
Tool Strength Ŷ
SEC-MultiDrill MTL Type: Normal wear
Ɣ Durability Comparison
SEC-MultiDrill MTL Type
Brazed Drill Competitor's Product B Competitor's Product A
0.7126
SEC-MultiDrill MTL Type
0.7106
After 900 holes (equivalent to 112ft)
Competitor's Product A: Large amount of wear
Brazed Drill
0.7086
0.7066
0 0.008 0.016 0.024 0.032 0.040 0.048
After 900 holes (equivalent to 112ft)
Feed Rate at which Drill Was Damaged f ( IPM )
Competitor's Product B: Shoulder breakage
0
200
400
600
800 1000
No. of Holes
Part Material
: Carbon Steel, O.D.: ø0.709”
Part Material
: Carbon Steel, O.D. : ø0.630”
c =262 SFM Hole Depth : 1.50”
Cutting Conditio n s : v
Cutting Conditions : v
c =230 SFM, f =0.010” Hole Depth 1.50” (through), wet
After 670 holes (equivalent to 82ft)
Ŷ Recommended drilling method for 12D Type: Use a collet, hydro chuck or milling chuck to hold the 12D drill body (tapered collet chuck cannot be used)
(1) Drill a guide hole with SMDH żżż M (3D holder) + MTL Type (head) Ɣ Use a 3D drill body and a drill head with the same diameter as the 12D (same cat. no.) when drilling the guide hole.
(3) Increase spindle speed until the set spindle speed is reached, then start drilling
*On some NC machines, the feed command may be activated before the set spindle speed is reached, so it is recommended to enter a dwell sequence before the feed command.
H = Drill diameter × 1 to 1.5 times the depth
Increase rotation speed
H
(2) Feed the SMDH żżż -12D (12D holder) + MTL Type (head) through the guide hole at a low spindle speed Ɣ Spindle speed: 500 RPM Ɣ Feed rate: 39.37 IPM to 78.74 IPM
(4) After drilling, rotation speed is reduced and the drill is retracted from the work material Ɣ Spindle speed: 500 RPM Ɣ Feed rate: 39.37 IPM to 78.74 IPM
*If the drill is inserted into the guide hole at the set cutting speed, peripheral run-out may cause damage to the drill's peripheral edges.
*Retracting a drill from the work material at a high spindle speed, is dangerous as doing so may result in breakage due to runout.
Change rotation speed to 500 RPM
Stop 0.040” away from the guide hole depth
1
J90
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