18mm Rods | McMaster-Carr

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18 Products

About Copper, Brass, and Bronze

About Shafts

About Stainless Steel

About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron

About Tool Steel

Multipurpose 304 Stainless Steel

From cookware to chemical-processing equipment, 304 stainless steel is a good all-around choice for a wide range of applications. It maintains its corrosion resistance in temperatures up to 1500° F.

If you don't see the rod size you're looking for, please specify a length under additional 304/304L stainless steel rod lengths.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

304 Stainless Steel Rods

Yield Strength: 30,000 psi
Hardness: Rockwell B80 (Medium)
Heat Treatment: Annealed (Softened)
Heat Treatable: No

Dia., mm	Dia. Tolerance, mm	Fabrication	Straightness Tolerance		1 ft. Lg.	1 1/2 ft. Lg.	3 ft. Lg.
18	-0.043 to 0	Cold Worked	1 mm per 1 m	0000000	000000	000000	0000000

Easy-to-Machine 303 Stainless Steel

Widely used for fabricating fittings and fasteners, 303 stainless steel machines quickly without sticking to cutting tools. It maintains its corrosion resistance in temperatures up to 1500° F.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Rods

Yield Strength: 25,000 psi
Hardness:
Inch Sizes: Rockwell B77 (Medium)
Metric Sizes: Rockwell B85 (Medium)
Heat Treatment: Annealed (Softened)
Heat Treatable: No
Specifications Met:
Inch Sizes: ASTM A582
Metric Sizes: EN 10088-3

Metric
Dia.	Fabrication	Straightness Tolerance	Dia. Tolerance		1 ft. Lg.	1 1/2 ft. Lg.	3 ft. Lg.
18mm	Cold Drawn	1 mm	-0.043mm to 0mm	0000000	000000	000000	0000000

Hardened Tight-Tolerance High-Strength 17-4 PH Stainless Steel

Yield Strength: 170,000 psi
Hardness: Rockwell C42 (Hard)
Heat Treatment: Hardened
Temper: H900
Specifications Met: ASTM A564, SAE AMS5643

Hardened for improved strength and wear resistance, these rods are precision ground to a strict diameter tolerance. Use them for turning applications in your lathe. With a higher chromium content than 15-5 PH stainless steel, this high-strength 17-4 PH offers better corrosion resistance. It’s also known as 630 stainless steel. This material maintains its corrosion resistance in temperatures up to 1100° F.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia.	Dia. Tolerance	Fabrication	Straightness Tolerance	Magnetic Properties		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
18mm	-0.013mm to 0mm	Cold Drawn or Hot Rolled	1/16" per ft.	Magnetic	0000000	000000	0000000	0000000

Tight-Tolerance High-Strength 17-4 PH Stainless Steel

Each piece is precision ground to offer tighter tolerances than standard 17-4 PH stainless steel. With a higher chromium content than 15-5 PH stainless steel, this high-strength material offers better corrosion resistance. It's also known as 630 stainless steel. It maintains its corrosion resistance in temperatures up to 1100° F.

Rods are held to a strict diameter tolerance, so they’re ready for turning in your lathe.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Rods

Yield Strength: 118,000 psi
Hardness: See table
Heat Treatment: Annealed (Softened)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C47
Specifications Met: ASTM A564

Dia.	Dia. Tolerance	Fabrication	Hardness	Straightness Tolerance	Magnetic Properties		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	6 ft. Lg.
18mm	-0.013mm to 0mm	Cold Worked	Rockwell C28 (Hard)	1/16" per ft.	Magnetic	0000000	000000	000000	000000	0000000	0000000

Corrosion-Resistant 316 Stainless Steel

The addition of molybdenum gives 316 stainless steel excellent corrosion resistance. Use it in a variety of marine and chemical-processing applications. It maintains its corrosion resistance up to the maximum temperature.

If you don’t see the rod size you’re looking for, please specify a length under additional rod lengths.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Rods

Yield Strength:
Inch Sizes: 30,000 psi
Metric Sizes: 29,000 psi
Hardness:
Inch Sizes: Rockwell B75 (Medium)
Metric Sizes: Rockwell B80 (Medium)
Heat Treatment: Annealed (Softened)
Heat Treatable: No
Specifications Met:
Inch Sizes: ASTM A276

316 Stainless Steel
Dia.	Dia. Tolerance	Fabrication	Max. Temp., °F	Straightness Tolerance		1 ft. Lg.	1 1/2 ft. Lg.	3 ft. Lg.
Metric
18mm	-0.043mm to 0mm	Cold Drawn	1500°	1 mm	0000000	0000000	0000000	0000000

Hardened Tight-Tolerance Easy-to-Machine 416 Stainless Steel

Hardened for superior wear resistance, these rods are precision ground to a tight diameter tolerance so they’re ready for turning in a lathe. One of the most machinable types of stainless steel available, 416 contains sulfur for fast machining without clogging cutting tools. It's used for gears, screws, and shafts. It maintains its corrosion resistance in temperatures up to 1200° F.

Metric rods are also known as Project 70+.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Metric Rods

Yield Strength: 138,000 psi
Hardness: Rockwell C30 (Hard)
Heat Treatment: Hardened
Specifications Met: ASTM A582

Dia., mm	Dia. Tolerance , mm	Fabrication	Mechanical Finish	Straightness Tolerance	Magnetic Properties		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
18	-0.0127 to 0	Cold Worked	Precision Ground	1/16" per ft.	Magnetic	00000000	000000	000000	0000000

Tight-Tolerance Ultra-Machinable 12L14 Carbon Steel Rods

Yield Strength: 65,000 psi
Hardness: Rockwell B80 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C65
Specifications Met: ASTM A108

Ready for turning in a lathe, these rods are precision ground and held to a strict straightness tolerance. The lead additive acts as a lubricant, which allows 12L14 carbon steel to withstand very fast machining. It's used to fabricate a wide variety of machine parts.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia.	Dia. Tolerance	Mechanical Finish	Straightness Tolerance		1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	6 ft. Lg.
18mm	-0.012mm to 0mm	Precision Ground	1/16" per 3 ft.	0000000	000000	000000	000000	000000

Tight-Tolerance Multipurpose 4140 Alloy Steel Rods

Yield Strength: 60,000 psi
Hardness: Rockwell B90 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C60
Specifications Met: ASTM A108

Ready for turning in your lathe, these rods are precision ground and held to a strict straightness tolerance. Also known as chrome-moly steel, this versatile 4140 alloy steel is used for a wide range of parts, such as gears, axles, shafts, collets, and die holders. It resists fracturing from repeated stress.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia.	Dia. Tolerance	Heat Treatment	Mechanical Finish	Straightness Tolerance		1/2 ft. Lg.	1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	6 ft. Lg.	12 ft. Lg.
18mm	-0.013mm to 0mm	Annealed (Softened)	Precision Ground	1/16" per 3 ft.	00000000	000000	000000	000000	000000	0000000	0000000

High-Strength Multipurpose 4140 Alloy Steel Rods

Yield Strength: 130,000 psi
Hardness: Rockwell C32 (Hard)
Specifications Met: ASTM A108

Often called ETD-150, these rods are made from a modified version of 4140 alloy steel and have been drawn at high temperatures for excellent strength. Also known as chrome-moly steel, they are used for a wide range of parts, such as gears, axles, shafts, collets, and die holders. They resist fracturing from repeated stress.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Dia.	Dia. Tolerance	Heat Treatment	Straightness Tolerance		1 ft. Lg.	2 ft. Lg.	3 ft. Lg.	6 ft. Lg.
18mm	-0.025mm to 0mm	Hardened	3/16" per 10 ft.	0000000	000000	000000	0000000	0000000

Tight-Tolerance Multipurpose Air-Hardening A2 Tool Steel Rods

Precision ground and held to a strict straightness tolerance, these rods are ready for turning in your lathe. They’re also known as drill rod. A2 tool steel is more wear resistant than O1 and it keeps a sharper cutting edge. This air-hardening material is widely used for punches, broaches, and dies.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Metric Rods

Yield Strength: 55,000 psi
Hardness: Rockwell B90 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C62
Specifications Met: ASTM A681

Dia., mm	Dia. Tolerance, mm	Heat Treatment	Mechanical Finish	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
18	-0.025 to 0.025	Annealed (Softened)	Precision Ground	0.0125" per ft.	0000000	000000	0000000	0000000

Tight-Tolerance Multipurpose Oil-Hardening O1 Tool Steel Rods

Yield Strength: 50,000 psi
Hardness: Rockwell B90 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment:
Inch sizes: Rockwell C65
Metric sizes: Rockwell C62
Specifications Met: ASTM A681

Ready for turning in a lathe, these rods are precision ground to a tight diameter tolerance. They’re also known as drill rod. Often used for dies, punches, and gauges, O1 tool steel is an oil-hardening material that resists wear and abrasion.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

			3 ft. Lg.
Dia.	Dia. Tolerance	Mechanical Finish
18mm	-0.025mm to 0.025mm	Precision Ground	00000000

Ultra-Machinable 360 Brass Rods and Discs

Yield Strength:
Inch sizes: 15,000 psi
Metric sizes: 23,000 psi
Hardness: See table
Temper:
Inch sizes: H02 (1/2 Hard)
Metric sizes: 1/2 Hard
Heat Treatable: No
Specifications Met:
Inch sizes: ASTM B16
Metric sizes: European Standard EN 12164

With the highest lead content of all the brass alloys, 360 offers the best machinability. Often called free-machining and free-cutting brass, it stands up to high-speed drilling, milling, and tapping operations with minimal wear on your tools. It’s commonly used for gears, pinions, and lock components.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

			1 m Lg.
Dia., mm	Dia. Tolerance Range, mm	Hardness		Each
18	-0.08 to 0.08	Rockwell B75 (Medium)	0000000	0000000

Ultra-Hard C2 Tungsten Carbide Rods

Yield Strength: Not Rated
Hardness: Rockwell C80 (Very Hard)
Temper Rating: Not Rated

Tungsten carbide, sometimes called carbide, is harder than Corrosion-Resistant Tungsten with excellent wear resistance. Use it to machine long-lasting tools, such as end mills and inserts.

For technical drawings and 3-D models, click on a part number.

Rods

Rod

Dia.	Dia. Tolerance	Lg.	Lg. Tolerance	Mechanical Finish		Each
18mm	-0.007mm to 0mm	100mm	-1.5mm to 1.5mm	Precision Ground	0000000	0000000

Keyed Rotary Shafts

Combine these shafts with a machine key (not included) to transmit torque to gears, sprockets, and other power transmission components. All have an ANSI standard keyway (keys not included; see our selection of key stock). Their edges are chamfered to remove sharp corners, reducing damage to bearings, housings, and other components during installation. All are turned, ground, and polished to tight diameter and straightness tolerances.

Steel shafts are generally stronger than aluminum and stainless steel shafts but not as corrosion resistant. 1045 carbon steel shafts balance high strength and good machinability, making them ideal for general purpose use.

For technical drawings and 3-D models, click on a part number.

Fully Keyed

	Keyway
Lg.	Lg.	Wd.	Dp.	ANSI Keys Included	Edge Type	Yield Strength, psi		Each
Metric—1045 Carbon Steel (Rockwell B95)
18mm Dia.
200mm	200mm	6mm	3.5mm	No	Chamfered	75,000	0000000	000000
400mm	400mm	6mm	3.5mm	No	Chamfered	75,000	0000000	00000
1,000mm	1,000mm	6mm	3.5mm	No	Chamfered	75,000	0000000	000000
2,000mm	2,000mm	6mm	3.5mm	No	Chamfered	75,000	0000000	000000

Ultra-High-Temperature Quartz Glass Rods and Discs

Color: Clear
Max. Temperature: 2100° F
Fabrication: Annealed

Able to withstand temperatures up to 2100° F, this quartz glass is useful in high-temperature applications that also require optical clarity, such as high-intensity lighting, fiber-optic production, and optical lens systems. It provides excellent UV transmission, as well as high transmission in the visible and infrared ranges.

For technical drawings and 3-D models, click on a part number.

Rods

				12" Lg.
Dia., mm	Dia. Tolerance, mm	Edge Fabrication	Lg. Tolerance		Each
18	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	000000