CNC Carbide Deep Hole Drills Drill Diameter 10.1mm-12mm Internal Cooling Feature Machine Tools Specific Drill Bits for Steel

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CNC Carbide Deep Hole Drills Drill Diameter 10.1mm-12mm Internal Cooling Feature Machine Tools Specific Drill Bits for Steel

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Product Description

Deep Hole Drill Parameter Table

Product Parameters

Product Name: Deep Hole Drill MDH Series

Product Coating: Special high lubricity and high wear resistance coating

Product Features: Further improves deep hole processing efficiency. Designed as a stable chip-discharging and high-strength deep hole processing drill.

Drill Dia. (mm)	Speed (min^-1)	Feed (mm/r)	Speed (min^-1)	Feed (mm/r)	Speed (min^-1)	Feed (mm/r)	Speed (min^-1)	Feed (mm/r)
Work Material	Mild Steel / Low Carbon Steel SS400·S10C ~ 150HB ~ 500N/mm²		Carbon Steel S35C·S50C ~ 210HB ~ 710N/mm²		Alloy Steel SCM·SCr·SNCM 16 ~ 28HRC 710 ~ 900N/mm²		Alloy Steel / Prehardened Steel (C≥0.3%) SCM440 28-34HRC 900 ~ 1060N/mm²
Cutting Speed	60-125m/min		60-125m/min		60-125m/min		50-70m/min
~3	7500	0.06~0.12	7500	0.06~0.12	7500	0.06~0.12	6300	0.08~0.11
~4	6400	0.08~0.16	6400	0.08~0.16	6400	0.08~0.16	4700	0.1~0.15
~5	5800	0.1~0.2	5800	0.1~0.2	5800	0.1~0.2	3800	0.12~0.18
~6	4800	0.12~0.24	4800	0.12~0.24	4800	0.12~0.24	3100	0.14~0.02
~8	3600	0.16~0.28	3600	0.16~0.28	3600	0.16~0.28	2300	0.16~0.24
~10	2900	0.2~0.35	2900	0.2~0.35	2900	0.2~0.35	1900	0.18~0.27
~12	2400	0.24~0.42	2400	0.24~0.42	2400	0.24~0.42	1500	0.24~0.3

Drill Dia. (mm)	Speed (min^-1)	Feed (mm/r)	Speed (min^-1)	Feed (mm/r)	Speed (min^-1)	Feed (mm/r)	Speed (min^-1)	Feed (mm/r)
Work Material	Mild Steel / Low Carbon Steel SS400·S10C ~ 150HB ~ 500N/mm²		Carbon Steel S35C·S50C ~ 210HB ~ 710N/mm²		Alloy Steel SCM·SCr·SNCM 16 ~ 28HRC 710 ~ 900N/mm²		Alloy Steel / Prehardened Steel (C≥0.3%) SCM440 28-34HRC 900 ~ 1060N/mm²
Cutting Speed	60-125m/min		60-125m/min		60-125m/min		50-70m/min
~3	7500	0.06~0.12	7500	0.06~0.12	5300	0.06~0.12	4200	0.08~0.11
~4	6400	0.08~0.16	5600	0.08~0.16	4400	0.08~0.16	3100	0.1~0.15
~5	5800	0.1~0.2	4500	0.1~0.2	3800	0.1~0.2	2500	0.12~0.18
~6	4800	0.12~0.24	3800	0.12~0.24	3200	0.12~0.24	2100	0.14~0.02
~8	3600	0.16~0.28	2800	0.16~0.28	2400	0.16~0.28	1500	0.16~0.24
~10	2900	0.2~0.35	2300	0.2~0.35	1900	0.2~0.35	1200	0.18~0.27
~12	2400	0.24~0.42	1900	0.24~0.42	1600	0.24~0.42	1000	0.24~0.3

Cutting Conditions & Safety Notes:

This cutting parameter reference table is applicable to water-soluble cutting oil or oil mist cooling processing.
Please use high-quality water-soluble cutting oil with a dilution ratio of 20~30 times.
When using non-water-soluble cutting oil, please adjust the cutting parameters to between the minimum speed in the table and 70%.
Oil blockage will cause the product to break, so please be sure to install a filter on the oil supply equipment.
When processing high-hardness materials, please use 1D~2D pecking drilling.

Product Advantages

Non-Standard Customization: When our stock cannot meet your requirements, we provide professional and precise non-standard customization. Simply select the series you need.

Drilling Steps & Instructions

1. Pilot Hole Processing

Use a dedicated pilot drill or DK280 series 3D standard stock. Select a drill with a blade diameter Dc 0.02-0.05mm larger than that of the MDH type deep hole drill. It is recommended to deepen the pilot hole as much as possible.

2. Drill Insertion at Low Speed

Insert the MDH deep hole drill into the guide hole at low speed. Recommended parameters:

Speed: 500 min^-1 | Feed Speed: 1000 ~ 2000 mm/min

* inserting the deep hole drill into the guide hole at the set cutting speed will cause damage to the shoulder of the deep hole drill due to radial runout.

3. Increase Speed and Perform Cutting Feed

Increase the speed to the designated cutting speed, and then perform cutting feed. Since some CNC machine tools might issue feed instructions before reaching full set speed, entering a pause instruction before the feed instruction is recommended.

4. Speed Reduction and Drill Retraction

After processing, reduce speed before pulling the drill out of the workpiece. Recommended parameters:

Speed: 500 min^-1 | Feed Speed: 1000 ~ 2000 mm/min

* Pulling the deep hole drill out of the material at high speed is dangerous and may cause the drill to break due to vibration.

5. Other Entry Precautions

When the guide hole tool has a bevel entrance, the flat bottom surface needs to be processed first.

Cooling Optimization Instructions

1. Internal Cooling (Liquid)

Use an oil equivalent to JISA Class 1 No. 1 (emulsion).
Pump pressure:
- Steel: 1.5 ~ 2.0 MPa (Higher pressure increases cooling effect but monitor chips and damage).
- Castings & Aluminum Alloys: 4.0 ~ 6.0 MPa (Stronger focus on cooling).

2. Internal MQL (Minimal Quantity Lubrication)

Air pressure: 0.5 MPa or more.
Discharge volume: Set the device to maximum discharge volume. Adjust appropriately when processing aluminum alloys.

3. Dual-Liquid Internal Spraying

Air pressure: 0.5 MPa or more.
Discharge volume: Optimize the device settings before processing.

Details Images

Deep Hole Processing

Features a J-type chip removal groove shape designed to maintain stable chip evacuation during deep hole processing.

Capable of highly efficient processing for holes up to 20 times the drill diameter (e.g. blade diameter equivalent to S48C) at Vf-1000mm/min or more.

Equipped with an RX chisel shape that minimizes cutting resistance for high-efficiency machining.

Long Tool Life

Utilizes a special high-lubricity and high-wear-resistance coating to extend tool life across diverse materials.

Ensures a long and stable tool life by optimizing chip removal performance and lowering load fluctuations on the spindle.

Environmental Protection

Fully supports MQL (Minimal Quantity Lubrication) and dual-liquid spray cooling methods, discharging oil and water simultaneously for a cleaner, eco-friendly footprint.

Frequently Asked Questions (FAQ)

What coating is applied to the MDH Deep Hole Drill series?

The MDH series deep hole drills use a special coating designed for high lubricity and high wear resistance, which aids chip evacuation and extends tool lifespan.

What are the recommended cooling methods?

These drills are optimized for internal cooling using water-soluble cutting oil (dilution ratio 20-30 times), MQL (Minimal Quantity Lubrication) with at least 0.5 MPa air pressure, or dual-liquid spraying.

How should the tool be inserted into and retracted from the workpiece?

Both insertion and retraction should be done at a lower, controlled speed: 500 min⁻¹ with a feed speed between 1000 and 2000 mm/min. Do not insert or retract at full cutting speed, as this can lead to runout damage or tool breakage.

How can I prevent the drill from breaking due to oil blockage?

It is highly recommended to install a proper filter on your oil supply equipment to prevent blockage, as clogged oil flow will cause the tool to fail or break.

Can these drills process high-hardness materials?

Yes, when machining high-hardness work materials, you should employ a 1D~2D pecking drilling technique to manage load and heat.

Is customized sizing available?

Yes, when standard stock dimensions do not meet your exact requirements, professional non-standard customization is available for your specific series.

Product Detail

CNC Carbide Deep Hole Drills Drill Diameter 10.1mm-12mm Internal Cooling Feature Machine Tools Specific Drill Bits for Steel

Product Description

Deep Hole Drill Parameter Table