O1 Tool Steel Drill Rod 1/8" (3ft bar)
Specifications
| Material | Tool Steel |
| Shape | Drill Rod |
| Alloy | O1 |
| Diameter | 0.13 in" |
| Length | 3 ft (36") |
| Weight | /length |
| Surface | Precision Ground |
| MTR | Available Upon Request |
Characteristics
| Weldability | Not Recommended |
| Machining | Excellent |
| Bending/Forming | Poor |
| Wear Resistance | Excellent |
| Corrosion | Poor |
Shipping
Pickup In-Store
- Orders before 3pm ready next business day
- Same-day? Call the team
Standard Delivery
- Ships next business day (orders before 3pm)
- Shipping calculated at checkout
Cash on Delivery
- Available for established business accounts
- Courier collects payment on delivery
Description
Description
O1 Tool Steel Drill Rod — 1/8" diameter, precision ground, sold in standard 3-foot lengths.
O1 is an oil-hardening tool steel prized for its excellent dimensional stability during heat treatment. With a carbon content of 0.95–1.1%, it can achieve hardness up to 65 HRC after proper heat treating, making it ideal for precision tooling applications.
Common Applications
- Precision punches and dies
- Gauges and measuring tools
- Drill bushings and dowel pins
- Custom knife making
- Jigs and fixtures
- Shear blades and cutting tools
Key Properties
- Grade: O1 (Oil-Hardening)
- Hardness (annealed): ~217 HB
- Hardness (heat treated): 60–65 HRC
- Surface finish: Precision ground
- Standard length: 3 ft (36")
About O1 tool steel
O1 is an oil-hardening tool steel, about 0.9% carbon, that you buy soft, shape, then harden in your own shop to the low 60s HRC with a warm oil quench. It's the classic steel for first knives, punches, and one-off dies because it forgives: it hardens in plain oil instead of a violent water quench, and it moves very little doing it. We stock it as precision-ground drill rod and ground flat bar in 3 ft bars.
Read the full O1 tool steel guideWhy do knife makers start with O1?
How do you harden O1?
O1 Tool Steel Drill Rod 1/8" (3ft bar)