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China factory - ZHANGJIAGANG FLAME MACHINERY CO.,LTD.

ZHANGJIAGANG FLAME MACHINERY CO.,LTD.

  • China,Yangzhou
  • Verified Supplier
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  3. 4241 HSS Drill Bit Roll Forged 12mm Metal Black Oxide Twist Drill Bits 1 – 13mm
China 4241 HSS Drill Bit Roll Forged 12mm Metal Black Oxide Twist Drill Bits 1 – 13mm
China 4241 HSS Drill Bit Roll Forged 12mm Metal Black Oxide Twist Drill Bits 1 – 13mm

  1. China 4241 HSS Drill Bit Roll Forged 12mm Metal Black Oxide Twist Drill Bits 1 – 13mm
  2. China 4241 HSS Drill Bit Roll Forged 12mm Metal Black Oxide Twist Drill Bits 1 – 13mm
  3. China 4241 HSS Drill Bit Roll Forged 12mm Metal Black Oxide Twist Drill Bits 1 – 13mm
  4. China 4241 HSS Drill Bit Roll Forged 12mm Metal Black Oxide Twist Drill Bits 1 – 13mm
  5. China 4241 HSS Drill Bit Roll Forged 12mm Metal Black Oxide Twist Drill Bits 1 – 13mm
  6. China 4241 HSS Drill Bit Roll Forged 12mm Metal Black Oxide Twist Drill Bits 1 – 13mm

4241 HSS Drill Bit Roll Forged 12mm Metal Black Oxide Twist Drill Bits 1 – 13mm

  1. MOQ： 500PCS
  2. Price： 0.04-0.45$/PCS
  3. Get Latest Price
Payment Terms T/T, L/C, D/P
Supply Ability 400,0000Pcs Per Mouth
Delivery Time 30-45days
Packaging Details Plastic box,Double Blister card
Handle straight
Material High Speed Steel
Application Metal Drilling
Point Angel 118
Packing Plastic Box
Number Of Flutes 2
Cutting Direction Right Hand
Standard DIN338 for drill bit
Surface Treatment Black Oxide
Coating Black Coating
Shank Helix Shank
Flute Type Spiral
Brand Name XRTOOLS
Model Number 5.5MM
Certification ISO9000
Place of Origin JIANG SU

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  1. Product Details
  2. Company Details

Product Specification

Payment Terms T/T, L/C, D/P Supply Ability 400,0000Pcs Per Mouth
Delivery Time 30-45days Packaging Details Plastic box,Double Blister card
Handle straight Material High Speed Steel
Application Metal Drilling Point Angel 118
Packing Plastic Box Number Of Flutes 2
Cutting Direction Right Hand Standard DIN338 for drill bit
Surface Treatment Black Oxide Coating Black Coating
Shank Helix Shank Flute Type Spiral
Brand Name XRTOOLS Model Number 5.5MM
Certification ISO9000 Place of Origin JIANG SU
High Light 4241 HSS Black Oxide Drill Bit | Roll Forged 12mm Metal Steel ，Economical 4241 HSS Twist Drill Bit Set | 1-13mm General Purpose ，Black Oxide Coated HSS Drill Bit | Wood Plastics Light Metal DIY

4241 HSS Black Drill Bit Set – Roll Forged General Purpose Twist Drill Bits 1–13mm

Product Overview

The HSS 4241 roll forged drill bit with black oxide finish is designed as a cost-effective and reliable tool for everyday drilling needs. Manufactured from high-speed steel grade 4241 and treated with a black surface coating, this drill bit resists corrosion, improves chip evacuation, and minimizes friction during drilling. Produced by XINGRUI, it provides an excellent balance between durability and affordability, making it highly suitable for DIY users, home improvement, workshops, and light industrial applications.

Manufacturing Process

These drill bits are made through roll forging, a process in which heated HSS rods are rolled into precise shapes under high pressure. This manufacturing method produces a tough and resilient drill bit while maintaining economical pricing. The black oxide finish enhances surface hardness, protects against rust, and reduces heat build-up. With a 118° point angle, the bit provides smooth hole entry, reduces walking, and ensures stable drilling performance.
 

Applications

The black-finished 4241 drill bits are versatile and recommended for:
 
Woodworking: Softwood, hardwood, plywood, MDF, particleboard
 
Plastics: PVC pipes, ABS sheets, acrylic, polycarbonate, and composites
 
Light Metals: Aluminum, copper, zinc, brass, and mild steel sheets
 
Household & DIY Projects: Furniture installation, cabinetry, wall fixtures, small repairs
 
Workshops: General drilling tasks that do not require premium cobalt or M2 bits
 
⚠️ Not suitable for stainless steel, heat-treated steels, or high-carbon alloys.
 

Advantages

 
HSS 4241 material – tough and economical for general drilling
 
Roll forged construction – high toughness and stable quality
 
Black oxide finish – reduces wear, prevents rust, and lowers friction
 
118° point design – easy positioning and smooth drilling
 
Versatile applications – suitable for wood, plastics, and light metals
 
Wide availability – offered in both metric and inch sizes
 

Specifications (Metric, 1.0–13.0 mm, 0.5 mm increment)

 
Diameter (mm) Overall Length (mm) Flute Length (mm)
1.0 34 12
1.5 40 18
2.0 49 24
2.5 57 30
3.0 61 33
3.5 70 39
4.0 75 43
4.5 82 47
5.0 86 52
5.5 93 57
6.0 93 57
6.5 101 63
7.0 109 69
7.5 109 69
8.0 117 75
8.5 117 75
9.0 125 81
9.5 125 81
10.0 133 87
10.5 133 87
11.0 151 109
11.5 151 109
12.0 151 109
12.5 151 109
13.0 151 109
 
 
Inch sizes from 1/16” to 1/2” also available.

Packaging Options

 
Bulk Packaging: 10 pcs or 20 pcs per PVC bag or plastic tube
 
Retail Packaging: Blister cards, plastic boxes, or hanging packs with labels
 
Drill Bit Sets: 13, 19, or 29-piece sets supplied in durable plastic or metal cases
 
OEM/ODM: Custom logos, laser marking, and private-label packaging available
 

FAQ

 
Q1: Can these drill bits be used on stainless steel?
No, they are only recommended for soft metals, plastics, and wood. Stainless steel requires cobalt (M35) drill bits.
 
Q2: What is the role of the black oxide coating?
It provides rust protection, reduces heat generation, and extends the service life of the drill bit.
 
Q3: Are these suitable for professional use?
Yes, they are widely used in workshops and light industry where affordable and reliable drill bits are needed.
 
Q4: Do you supply sets with both metric and inch sizes?
Yes, sets are available in both metric (1–13mm) and inch (1/16”–1/2”) increments.

 

 

 

 

 

Company Details

Bronze Gleitlager

,

Bronze Sleeve Bushings

 and 

Graphite Plugged Bushings

 from Quality China Factory

  • Business Type:

    Manufacturer,Exporter,Trading Company

  • Year Established:

    2018

  • Total Annual:

    500-600

  • Employee Number:

    135~150

  • Ecer Certification：

    Verified Supplier

Jiangsu Xing Rui Precision Tools Co., Ltd. is a leading manufacturer of high-quality cutting tools in China, established in 2008 and located in Danyang, Jiangsu Province—a major hub for cutting tool production with convenient transportation for global logistics. Main Products We speciali... Jiangsu Xing Rui Precision Tools Co., Ltd. is a leading manufacturer of high-quality cutting tools in China, established in 2008 and located in Danyang, Jiangsu Province—a major hub for cutting tool production with convenient transportation for global logistics. Main Products We speciali...

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Get in touch with us

  • Reach Us
  • ZHANGJIAGANG FLAME MACHINERY CO.,LTD.
  • No. 16 Wenchang Road, Huicun Village, Dinggou Town, Jiangdu District, Yangzhou City,Jiang Su Province.
  • https://www.hss-drillbit.com/

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