4241 HSS Drill Bit Roll Forged 12mm Metal Black Oxide Twist Drill Bits 1 – 13mm For Steel
Price:
0.04-0.45$/PCS
MOQ:
500PCS
Delivery Time:
30-45days
Brand:
XRTOOLS
Product Description
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.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
ZHANGJIAGANG FLAME MACHINERY CO.,LTD.
Location
No. 16 Wenchang Road, Huicun Village, Dinggou Town, Jiangdu District, Yangzhou City,Jiang Su Province.
Contact Person
Jerry