Drills

Steel, Alloy Steel, Cast Iron Solid Carbide Drills

High-performance carbide drill optimized for stainless steel, ductile iron and alloy steel. Stable cutting performance, longer tool life and improved productivity for hydraulic components, elevator parts and general machining.

Specifications

Spec 1: Double curved surface design, sickle shaped blade, enhances chip breaking effect;
Spec 1: The chip removal groove polishing process helps to improve the smoothness of iron chip discharge;
Spec 1: New coating technology provides excellent processing life;

Product Overview

Hard alloy drill bits are made of hard alloy materials such as tungsten carbide as the main cutting components, complete hard alloy rods, and precision ground using a 5-axis fully automatic machining center. Hard alloy drill bits have a wide range of versatility, with high strength, high hardness, fast cutting speed, wear resistance, and good red hardness, making them suitable for processing various materials of parts. Hard alloy drill bits can be divided into two types based on their cooling structure: those without cooling holes and those with cooling holes.

Introduction

Item	Parameter
Processing Material	ISO Workpiece Material Groups P, M, K, N, S, H
Application Industry:	Construction machinery industry, energy industry, and automotive industry
Overall Tool Length	60‑120 mm
Number of Cutting Teeth(Z)	2 teeth,4 teeth,6 teeth
Coolant Option	External coolant / Internal through coolant
PCD Grain Grades	Fine grain, medium grain, coarse grain
Tool specifications	Processing range D3-D20; Head tolerance h7;
Machining Type	Precision drilling, finishing reaming, combined drill‑reaming
Custom Service	Custom diameter, stepped profile, special flute geometry, special shank (BT / HSK)

Tool parameters

Part Number	Dc（h7） mm	Lu mm	OAL mm	LCF mm	LS mm	DCON(h60) mm
D105-05-03000A0	3.0	23	66	28	36	4
D105-05-03100A0	3.1	23	66	28	36	4
D105-05-03200A0	3.2	23	66	28	36	4
D105-05-03300A0	3.3	23	66	28	36	4
D105-05-03400A0	3.4	23	66	28	36	4
D105-05-03500A0	3.5	23	66	28	36	4
D105-05-03600A0	3.6	23	66	28	36	4
D105-05-03700A0	3.7	23	66	28	36	4
D105-05-03800A0	3.8	29	74	36	36	4
D105-05-03900A0	3.9	29	74	36	36	4
D105-05-04000A0	4.0	29	74	36	36	4
D105-05-04100A0	4.1	29	74	36	36	6
D105-05-04200A0	4.2	29	74	36	36	6
D105-05-04300A0	4.3	29	74	36	36	6
D105-05-04400A0	4.4	29	74	36	36	6
D105-05-04500A0	4.5	29	74	36	36	6
D105-05-04600A0	4.6	29	74	36	36	6
D105-05-04700A0	4.7	29	74	36	36	6
D105-05-04800A0	4.8	35	82	44	36	6
D105-05-04900A0	4.9	35	82	44	36	6
D105-05-05000A0	5.0	35	82	44	36	6
D105-05-05100A0	5.1	35	82	44	36	6
D105-05-05200A0	5.2	35	82	44	36	6
D105-05-05300A0	5.3	35	82	44	36	6
D105-05-05400A0	5.4	35	82	44	36	6
D105-05-05500A0	5.5	35	82	44	36	6
D105-05-05600A0	5.6	35	82	44	36	6
D105-05-05700A0	5.7	35	82	44	36	6
D105-05-05800A0	5.8	35	82	44	36	6
D105-05-05900A0	5.9	35	82	44	36	6
D105-05-06000A0	6.0	35	82	44	36	6
D105-05-06100A0	6.1	43	91	53	36	8
D105-05-06200A0	6.2	43	91	53	36	8
D105-05-06300A0	6.3	43	91	53	36	8
D105-05-06400A0	6.4	43	91	53	36	8
D105-05-06500A0	6.5	43	91	53	36	8
D105-05-06600A0	6.6	43	91	53	36	8
D105-05-06700A0	6.7	43	91	53	36	8
D105-05-06800A0	6.8	43	91	53	36	8
D105-05-06900A0	6.9	43	91	53	36	8
D105-05-07000A0	7.0	43	91	53	36	8

Carbide Drill Failure Modes & Countermeasures

Failure Mode	Cause Analysis	Solutions
Flank Wear	Flank wear occurs due to friction between workpiece and the flank face.	• Reduce cutting speed• Increase feed rate• Increase coolant flow (e.g. by raising coolant pressure)
Built-up Edge (BUE)	Built-up edge is caused by micro cold welding of workpiece material on the cutting edge.	• Increase cutting speed• Increase coolant flow (e.g. by raising coolant pressure)
Chipping	Chipping results from thermal cracks, cutting impact, vibration and excessive wear resistance of tool material.	• Replace or recondition tools earlier• Improve system rigidity (workpiece / tool)
Plastic Deformation	High heat generation and mechanical load lead to plastic deformation.	• Reduce feed rate• Increase coolant flow (e.g. by raising coolant pressure)
Crater Wear	Crater wear on rake face caused by diffusion and friction.	• Increase cutting speed• Increase feed rate• Raise coolant pressure

Processing Parameters

ISO Group	Workpiece Material	Brinell Hardness (HB)	Tensile Strength Rm (N/mm²)	External CoolingVc (m/min)	External CoolingFeed Code	Internal CoolingVc (m/min)	Internal CoolingFeed Code
P	Unalloyed Steel C≤0.25% (Annealing)	125	428	100-110	F	110-120	F
P	Unalloyed Steel 0.25＜C≤0.55% (Annealing)	190	639	80-100	E	100-110	E
P	Unalloyed Steel 0.25＜C≤0.55% Q&T	210	708	80-100	E	100-110	E
P	Unalloyed Steel C＞0.55% (Annealing)	190	639	90-100	E	100-110	E
P	Unalloyed Steel C＞0.55% Q&T	300	1013	70-80	D	80-90	D
P	Free cutting steel (short chips) (Annealing)	220	745	100-120	F	110-120	F
P	Low-alloy Steel Annealing	175	591	80-100	E	80-110	E
P	Low-alloy Steel Q&T	285	960	70-90	D	70-90	D
P	Low-alloy Steel Q&T	380	1282	40-50	C	40-50	C
P	Low-alloy Steel Q&T	430	1477	35-45	B	35-45	B
P	High Alloy Tool Steel Annealing	200	675	75-85	D	75-85	D
P	High Alloy Tool Steel Quenching & Tempering	300	1013	60-70	C	60-70	C
P	High Alloy Tool Steel Quenching & Tempering	400	1361	50-60	C	50-60	C
M	Stainless Steel Ferrite/Martensite, Annealing	200	675	70-80	D	80-90	D
M	Stainless Steel Martensite, Q&T	330	1114	45-60	C	-	-
M	Austenitic Stainless Steel, Quenched	200	675	40-50	C	-	-
M	Austenitic precipitation hardening stainless steel (PH stainless steel)	300	1013	40-50	C	-	-
M	Austenitic ferritic Duplex stainless steel	230	778	30-40	B	-	-
K	Malleable Cast Iron Ferrite	200	400	110-130	G	120-130	G
K	Malleable Cast Iron Pearlite	260	700	85-100	G	90-110	G
K	Grey Cast Iron Low tensile strength	180	200	110-120	H	120-130	H
K	Grey Cast Iron High tensile strength/austenite	245	350	80-100	G	90-110	G
K	Ductile Cast Iron Ferrite	155	400	110-120	G	120-130	H
K	Ductile Cast Iron Pearlite	265	700	60-80	F	60-80	F
K	Creep Graphite Cast Iron GGV (CGI)	230	400	60-80	F	60-80	F
N	Forged Aluminum Alloy Non-time processing	30	-	200-300	G	300-400	G
N	Forged Aluminum Alloy Time sensitive processing	100	340	200-300	G	300-400	G
N	Cast Aluminum Alloy ≤12% silicon, Non aging treatment	75	260	160-220	H	180-240	H
N	Cast Aluminum Alloy ≤12% silicon, Age treatable	90	310	160-200	H	180-200	H
N	Cast Aluminum Alloy >12% silicon, Non aging treatment	130	450	130-160	G	140-180	G
N	Magnesium Alloy	70	250	-	-	-	-
N	Copper and Copper Alloys Non alloy, electrolytic copper	100	340	120-160	C	140-170	D
N	Copper and Copper Alloys Brass, Bronze, Red Brass	90	310	110-140	E	120-140	E
N	Copper and Copper Alloys Copper alloy, short chips	110	380	120-150	F	140-180	F
N	Copper and Copper Alloys High strength Ampco alloy	300	1010	45-60	B	45-60	B
S	Superalloy Iron based (Annealing)	200	680	30-40	B	(Time limit)	-
S	Superalloy Iron based	280	940	20-25	A	-	-
S	Superalloy Nickel based or cobalt based (Annealing)	250	840	20-30	B	(Time limit)	-
S	Superalloy Nickel based or cobalt based	350	1180	10-15	A	-	-
S	Superalloy (Casting)	320	1080	15-25	A	-	-
S	Titanium Alloy Pure titanium	200	680	30-40	B	40-50	C
S	Titanium Alloy Alpha & beta phase alloys, Aged treatment	375	1260	20-30	A	25-35	B
S	Titanium Alloy β - phase alloy	410	1400	10-15	A	-	-
S	Tungsten Alloy	300	1010	-	-	-	-
S	Molybdenum Alloy	300	1010	-	-	-	-
H	Quenched steel 50HRC	-	-	20-35	A	20-35	A
H	Quenched steel Q&T 55HRC	-	-	-	-	-	-
H	Quenched steel Q&T 60HRC	-	-	-	-	-	-
H	Quenched Cast iron Q&T 55HRC	-	-	-	-	-	-

Feed Reference Table (Feed per revolution f, mm/rev)

Matches the Feed Code (A/B/C/D/E/F/G/H) used in D105 drill cutting parameter table

Drill Diameter (mm)	A	B	C	D	E	F	G	H
3	0.03	0.04	0.05	0.06	0.08	0.10	0.12	0.14
4	0.04	0.05	0.06	0.08	0.10	0.12	0.14	0.16
5	0.05	0.06	0.07	0.09	0.10	0.12	0.16	0.18
6	0.05	0.07	0.08	0.10	0.12	0.15	0.18	0.20
8	0.06	0.08	0.10	0.12	0.15	0.18	0.20	0.23
10	0.08	0.10	0.12	0.14	0.18	0.20	0.24	0.28
12	0.10	0.12	0.14	0.18	0.20	0.24	0.28	0.32
14	0.10	0.14	0.18	0.20	0.24	0.28	0.32	0.34
16	0.12	0.15	0.18	0.20	0.25	0.30	0.34	0.36
20	0.15	0.16	0.20	0.25	0.30	0.34	0.37	0.40