Literal statement:

HJDK600 Inner Cooling Twist Drills for General Purpose

Carbide drills provide faster cutting rates, longer tool life, better positional and dimensional accuracy and improved surface finish. Slot and pocket milling often creates chip evacuation problems, especially on vertical machining centers. Re-cutting chips can cause End mill failure.  Coolant-through end millshelp evacuate chips from the cutting zone. This eliminates the problem or re-cutting chips. 

Features:

Suitable for drilling steel, stainless steel, cast iron, non-ferrous material.

Stub chisel,excellent self-center capability.

Radial point, smaller cutting resistance.

Lip chamfer, higher feed rate, higher efficiency.

Regular size:

Ordering code	Outside Diameter (D)	Flute Length  (l)	Overall Length (L)	Shank Diameter （D）
HJDK600-0500D	5.00	28	66	6
HJDK600-0510D	5.10	28	66	6
HJDK600-0520D	5.20	28	66	6
HJDK600-0550D	5.50	28	66	6
HJDK600-0555D	5.55	28	66	6
HJDK600-0580D	5.80	28	66	6
HJDK600-0600D	6.00	28	66	6
HJDK600-0610D	6.10	34	79	8
HJDK600-0620D	6.20	34	79	8
HJDK600-0630D	6.30	34	79	8
HJDK600-0650D	6.50	34	79	8
HJDK600-0660D	6.60	34	79	8
HJDK600-0680D	6.80	34	79	8
HJDK600-0690D	6.90	34	79	8
HJDK600-0700D	7.00	34	79	8
HJDK600-0710D	7.10	41	79	8
HJDK600-0740D	7.40	41	79	8
HJDK600-0750D	7.50	41	79	8
HJDK600-0780D	7.80	41	79	8
HJDK600-0800D	8.00	41	79	8
HJDK600-0810D	8.10	47	89	10
HJDK600-0840D	8.40	47	89	10
HJDK600-0850D	8.50	47	89	10
HJDK600-0860D	8.60	47	89	10
HJDK600-0870D	8.70	47	89	10
HJDK600-0880D	8.80	47	89	10
HJDK600-0900D	9.00	47	89	10
HJDK600-0930D	9.30	47	89	10
HJDK600-0950D	9.50	47	89	10
HJDK600-0960D	9.60	47	89	10
HJDK600-0980D	9.80	47	89	10
HJDK600-1000D	10.00	47	89	10
HJDK600-1025D	10.25	55	102	12
HJDK600-1040D	10.40	55	102	12
HJDK600-1050D	10.50	55	102	12
HJDK600-1060D	10.60	55	102	12
HJDK600-1080D	10.80	55	102	12
HJDK600-1100D	11.00	55	102	12
HJDK600-1120D	11.20	55	102	12
HJDK600-1150D	11.50	55	102	12
HJDK600-1180D	11.80	55	102	12
HJDK600-1200D	12.00	55	102	12
HJDK600-1225D	12.25	60	107	14
HJDK600-1250D	12.50	60	107	14
HJDK600-1270D	12.70	60	107	14
HJDK600-1275D	12.75	60	107	14
HJDK600-1280D	12.80	60	107	14
HJDK600-1300D	13.00	60	107	14
HJDK600-1310D	13.10	60	107	14
HJDK600-1350D	13.50	60	107	14
HJDK600-1380D	13.80	60	107	14
HJDK600-1400D	14.00	60	107	14
HJDK600-1425D	14.25	65	115	16
HJDK600-1450D	14.50	65	115	16
HJDK600-1475D	14.75	65	115	16
HJDK600-1480D	14.80	65	115	16
HJDK600-1500D	15.00	65	115	16
HJDK600-1510D	15.10	65	115	16
HJDK600-1550D	15.50	65	115	16
HJDK600-1580D	15.80	65	115	16
HJDK600-1600D	16.00	65	115	16

We can produce 3D,5D, 8D drills according to customer's requirements or nonstandard drills as customized. We could also produce nonstandard end mills as customized. 

Tool material composition:
1. Physical Properties:
a. Hardness greater than or equal to 92.8 HRA；
b. Density greater than or equal to 14.2g/cm³；
c. TRS greater than or equal to 4200 N/mm²；
d. Free of ETA phase condition；
e. No contamination by other materials；
f. Porosity = A00/ B00 / C00 ；
g. Uniform and consistent grain size. No grain size can be larger than specified.
h. Chromium carbide grain growth inhibitor only.
2. All the tools of production, coatings are used in Germany, Switzerland,  processing equipment；
3. It's proposed cutting less than 60HRC.

Coating:
Nano Coating AlTiN
Characteristics and Function
1、High aluminum content provides excellent hot hardness and oxidation resistance.
2、Special method optimizes the structure of coating,significantly improved stability,reducing the number of surface droplet.

Operation parameter:

Workpeice material	Cutting	Feed rate(mm/rev)
	speed
	(m/min)
	Internal	D3	D4	D6	D8	D10	D12	D14	D16	D18	D20
	cooling
	drill
Low carbon steel, long chip	14	0.09	0.11	0.14	0.19	0.23	0.24	0.28	0.3	0.33	0.34
（<125HB）	100	0.13	0.15	0.19	0.25	0.3	0.33	0.38	0.42	0.42	0.43
	60	0.16	0.19	0.23	0.31	0.38	0.41	0.45	0.5	0.5	0.51
Low carbon steel,short cut,	140	0.09	0.11	0.14	0.19	0.23	0.24	0.28	0.3	0.33	0.34
easy cut steel	100	0.13	0.15	0.19	0.25	0.3	0.33	0.38	0.42	0.42	0.43
（<125HB）	60	0.16	0.19	0.23	0.31	0.38	0.41	0.45	0.5	0.5	0.51
High carbon steel and medium	120	0.09	0.11	0.14	0.19	0.23	0.24	0.28	0.3	0.33	0.34
carbon steel	80	0.13	0.15	0.19	0.25	0.3	0.33	0.38	0.42	0.42	0.43
（<25HRC）	60	0.16	0.19	0.23	0.31	0.38	0.41	0.45	0.5	0.5	0.51
Alloy steel,tool steel	110	0.09	0.11	0.14	0.19	0.23	0.24	0.28	0.3	0.33	0.34
(<35HRC）	80	0.13	0.15	0.19	0.25	0.3	0.33	0.38	0.42	0.42	0.43
	50	0.16	0.19	0.23	0.31	0.38	0.41	0.45	0.5	0.5	0.51
Alloy steel,tool steel（35-48HRC）	90	0.09	0.1	0.13	0.17	0.21	0.22	0.26	0.28	0.31	0.31
	60	0.12	0.14	0.17	0.23	0.28	0.3	0.35	0.37	0.38	0.39
	40	0.14	0.17	0.22	0.29	0.35	0.37	0.41	0.44	0.46	0.47
PH and ferritic,	80	0.09	0.1	0.13	0.17	0.21	0.22	0.26	0.28	0.31	0.31
martensitic steels	50	0.12	0.14	0.17	0.23	0.28	0.3	0.35	0.37	0.38	0.39
（<35HRC）	30	0.14	0.17	0.23	0.29	0.35	0.37	0.41	0.44	0.46	0.47
Austenitic stainless steel	50	0.05	0.06	0.07	0.08	0.09	0.1	0.11	0.12	0.13	0.14
（130-200HB）	40	0.08	0.1	0.12	0.13	0.15	0.17	0.18	0.2	0.22	0.24
	20	0.1	0.12	0.14	0.18	0.2	0.22	0.24	0.24	0.26	0.28
High strength austenitic and	55	0.03	0.04	0.05	0.06	0.07	0.08	0.09	0.1	0.1	0.12
forged stainless steel	40	0.06	0.08	0.08	0.1	0.11	0.13	0.13	0.14	0.14	0.16
（<25HRC）	30	0.08	0.1	0.1	0.12	0.14	0.16	0.18	0.18	0.2	0.22
Duplex stainless steel	55	0.03	0.04	0.05	0.06	0.07	0.08	0.09	0.1	0.1	0.12
（<30HRC）	40	0.06	0.08	0.08	0.1	0.11	0.13	0.13	0.14	0.14	0.16
	20	0.08	0.1	0.1	0.12	0.14	0.16	0.18	0.18	0.2	0.22
Gray iron	140	0.13	0.15	0.17	0.2	0.25	0.26	0.28	0.3	0.32	0.36
（<32HRC）	120	0.17	0.02	0.26	0.32	0.36	0.38	0.4	0.42	0.44	0.48
	60	0.21	0.26	0.32	0.4	0.42	0.46	0.5	0.52	0.54	0.56
Alloy iron of medium	140	0.11	0.13	0.15	0.17	0.22	0.22	0.24	0.26	0.3	0.34
processing difficulty,	120	0.15	0.18	0.23	0.26	0.28	0.34	0.35	0.4	0.4	0.43
nodular cast iron	60	0.18	0.22	0.27	0.38	0.38	0.42	0.44	0.48	0.46	0.5
（<28HRC）
Intractable high alloy  cast iron,	100	0.06	0.08	0.1	0.13	0.15	0.17	0.19	0.2	0.23	0.23
nodular cast iron	90	0.09	0.1	0.13	0.17	0.2	0.22	0.26	0.27	0.28	0.29
（<28HRC）	60	0.11	0.13	0.16	0.21	0.26	0.28	0.31	0.33	0.34	0.35
Wrought aluminum alloy	315	0.06	0.13	0.16	0.18	0.2	0.22	0.24	0.28	0.32	0.34
（Si<12%）	230	0.09	0.2	0.22	0.26	0.3	0.34	0.36	0.38	0.4	0.42
	90	0.11	0.26	0.28	0.32	0.38	0.42	0.44	0.46	0.48	0.48
Cast aluminium alloy	315	0.06	0.13	0.16	0.18	0.2	0.22	0.24	0.28	0.32	0.34
（Si<12%）	230	0.09	0.2	0.22	0.26	0.3	0.34	0.36	0.38	0.4	0.42
	90	0.11	0.26	0.28	0.32	0.38	0.42	0.44	0.46	0.48	0.48
Cast aluminium alloy	270	0.06	0.13	0.16	0.18	0.2	0.22	0.24	0.28	0.32	0.34
（Si>12%）	180	0.09	0.2	0.22	0.26	0.3	0.34	0.36	0.38	0.4	0.42
	90	0.11	0.26	0.28	0.32	0.38	0.42	0.44	0.46	0.48	0.48
Copper,copper alloy	180	0.06	0.13	0.16	0.18	0.2	0.22	0.24	0.28	0.32	0.34
（<200HB）	135	0.09	0.2	0.22	0.26	0.3	0.34	0.36	0.38	0.4	0.42
	90	0.11	0.26	0.28	0.32	0.38	0.42	0.44	0.46	0.48	0.48

Attention:

Make sure work peice and machine are stable and use a precision holder, use hydraulic chucks, high quality collet chucks.

Make sure total indicated run-out(TIR) is less than 0.02mm.

The recommended cutting condition is suitable for apply water soluable.

If the tool size is not in the table. Please refer to the table closet to the blade diameter size selection of cutting parameters, adjust cutting parameters according to actual working conditions during processing.

The company has a complete blade manufacturing process equipment production line from powder raw material preparation, mold making, pressing, pressure sintering, grinding, coating and coating post-treatment. It focuses on the research and innovation of the base material, groove structure, precision forming and surface coating of carbide NC inserts, and constantly improves the machining efficiency, service life and other cutting properties of carbide NC inserts. After more than ten years of scientific research and innovation, the company has mastered a number of independent core technologies, has independent R&D and design capabilities, and can provide customized production for each customer.