Industrial Power Tool Accessory DIN333 H.S.S. Center Drill Bit

Industrial Power Tool Accessory DIN333 H.S.S. Center Drill Bit For Drilling Metal, Hss Centre Drill A B R Type High Speed Steel For Industrial, HSS Cobalt Center Drill Bit for Centre Drilling, Solid Carbide HSS Central Drill Bit, M2 HSS 60° Angle Center Drill Bits Kit Countersink Tools, Carbide Center Drills, High-Speed Steel Center Drills, Center Drill Countersink Set, Woodworking Metalworking & Multipurpose Drill Bits China Supplier Factory

Industrial Power Tool Accessory DIN333 H.S.S. Center Drill Bit Specifications
Procuct Name HSS DIN333 Center Drill Bit
Material HSS4241,4341,6542 (Co5%-M35,Carbide are Available)
Process Fully Ground
Flute Straight Flutes(2 Flute is Available)
Surface Bright Finishing(Amber,Tin-coated ,AlTiN coated are Available)
Size 1.0MM-10MM
Standard DIN333A(DIN333B,DIN333R,Extra Long,GOST 14952-75 are Available)

PRODUCT SIZE: Our long-lasting center countersink drill bit set includes 7 pieces in different sizes 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm and 5.0mm to satisfy different needs. These drill bits are designed for precise, efficient drilling. This set comes with a portable storage case for convenient use, storage, and easy organization.
WIDE APPLICATION: Designed primarily for use on metal lathes, lathe tools, and drill presses, these center drill bits are used for precise hole spotting and starter hole positioning for larger drill bits. Suitable for a range of tough materials including steel, carbon steel, aluminum, iron, brass, wood and more. With recommended material hardness from 170–200 HB. Some sizes can also be used with electric drills when proper alignment and adequate chuck capacity are available
HIGH QUALITY: These center drill bits are crafted from premium M2 high-speed steel, offering outstanding hardness, solid construction, durability, and exceptional resistance to high-temperature wear. Designed for long-lasting performance and precise drilling results
EXACT PRECISION: Featuring a 60-degree cutting angle, these metal drill bits ensure accurate centering and are ideal for drilling precise center holes, 60-degree countersink holes, and starter holes for larger drill bits on metal surfaces. The accurate design helps prevent bit walking and delivers consistent, reliable performance every time
CUSTOMER SUPPORT: Customer satisfaction is important to us. If you have any questions or concerns, please feel free to contact us. Our support team will respond within 24 hours and work with you to ensure a smooth and reliable solution

In the precision-driven world of metalworking, ensuring accurate hole starting is paramount. Centre drills, specifically those manufactured to the DIN 333 standard, are fundamental tools designed for this critical task. Unlike regular twist drills, centre drills excel at creating precise centre holes that serve as reliable guides for subsequent drilling operations with larger bits or for supporting workpieces between centres during turning operations on lathes. This guide provides metalworkers with a clear understanding of the DIN 333 centre drill types: A, B, and R.

What are Centre Drills and Why the DIN 333 Standard?

Centre drills serve a dual purpose:

1. Accurate Alignment: They create a precisely located starting point, preventing larger drills from “walking” or deflecting off the desired centre, ensuring hole accuracy. DIN333R HSS Fully Ground Centre Drill Bit Type-R

2. Center Support: They drill the conical seats (centre holes) used to support workpieces between lathe centres (headstock and tailstock). A standard centre has a 60-degree included angle point that fits perfectly into these holes.

The DIN 333 standard, established by the Deutsches Institut für Normung (German Institute for Standardization), meticulously defines the geometry and dimensions for these essential tools. Adherence to this standard ensures consistency in performance, interchangeability, and reliable results when machining according to specified procedures or using equipment designed for standardized tooling.  DIN333 HSS Centre Drill Bit With Titanium Coated For Metal

 

 

Type A HSS Center Drill
d	D	L	I
1.00	3.15	33.50	1.90
1.25	3.15	33.50	1.90
1.60	4.00	37.50	2.80
2.00	5.00	42.00	3.30
2.50	6.30	47.00	4.10
3.15	8.00	52.00	4.90
4.00	10.00	59.00	6.20
5.00	12.50	66.00	7.50
6.30	16.00	74.00	9.20
Type B HSS Center Drill
d	D	L	I
1.00	4.00	37.50	1.90
1.25	5.00	42.00	2.20
1.60	6.30	47.00	2.80
2.00	8.00	52.00	3.30
2.50	10.00	59.00	4.10
3.15	11.20	63.00	4.90
4.00	14.00	70.00	6.20
5.00	18.00	78.00	7.50
6.30	20.00	83.00	9.20
Type R HSS Center Drill
d	D	L	I
1.00	3.15	33.50	3.00
1.25	3.15	33.50	3.35
1.60	4.00	37.50	4.25
2.00	5.00	42.00	5.30
2.50	6.30	47.00	6.70
3.15	8.00	52.00	8.50
4.00	10.00	59.00	10.60
5.00	12.50	66.00	13.20
6.30	16.00	74.00	17.00

Other specification is also available according to your requirements. (OEM, ODM )
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