1 7/8" Shafts | McMaster-Carr

Mount the flange to a machine or wall to support idler sprockets and pulleys in tensioning applications. They include washers and a nut to position your component and hold it in place.

Precision Acme Lead Screws and Nuts

Also known as single-start and self-locking lead screws and nuts, these have a single thread that runs the length of the screw. The nut travels only when the screw turns, so your system won't unexpectedly move when the lead screw is at rest.

Steel

Low-Carbon Steel Rods and Discs

Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into low-strength fasteners, pins, and axles.

High-Strength Easy-to-Machine
1144 Carbon Steel Rods

Made with more carbon and manganese than other easy-to-machine carbon steels, 1144 carbon steel has a higher yield strength and hardness. Also known as Stressproof, these rods are stress-relieved to minimize warping during machining.

Tight-Tolerance Ultra-Machinable
12L14 Carbon Steel Rods

Ready for turning in a lathe, these rods are precision ground and held to a strict straightness tolerance.

Ultra-Machinable 12L14 Carbon Steel Rods

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.

High-Strength 1045 Carbon Steel Rods and Discs

Stronger than low-carbon steel with equally good machinability, 1045 carbon steel is widely used for bolts, studs, and shafts.

High-Temperature Hardened Multipurpose
4140 Alloy Steel Rods and Discs

For use in high heat, these rods and discs keep their strength in temperatures up to 800° F. They’re hardened for increased abrasion and impact resistance.

Multipurpose 4140 Alloy Steel Rods and Discs

Also known as chrome-moly steel, this versatile 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.

Stainless 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.

Easy-to-Machine 303 Stainless Steel

Widely used for fabricating fittings and fasteners, 303 stainless steel machines quickly without sticking to cutting tools.

High-Strength 17-4 PH Stainless Steel

With a higher chromium content than 15-5 PH stainless steel, this high-strength 17-4 PH offers better corrosion resistance. It is also known as 630 stainless steel.

Hardened High-Strength 17-4 PH Stainless Steel

This material is hardened for improved strength and wear resistance.

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.

Easy-to-Machine Corrosion-Resistant
316 Stainless Steel

This material machines faster with less wear on cutting tools than standard 316 stainless steel. It's also called Prodec and Project 70+.

Easy-to-Machine 416 Stainless Steel

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.

Bearing-Quality 440C Stainless Steel

One of the hardest types of stainless steel after heat treating, 440C offers excellent wear and abrasion resistance. It's often used for bearings, valves, and knife blades.

Tool Steel

Tight-Tolerance Multipurpose
Oil-Hardening O1 Tool Steel Rods

Ready for turning in a lathe, these rods are precision ground to a tight diameter tolerance.

Tight-Tolerance Easy-to-Machine
W1 Tool Steel Rods

Made with lower amounts of alloy elements than other tool steels, these W1 rods are highly machinable. Also called drill rods, they are precision ground and held to strict diameter and straightness tolerances.

Aluminum

Multipurpose 6061 Aluminum Rods and Discs

The most widely used aluminum, 6061 is fabricated into everything from pipe fittings and containers to automotive and aerospace parts. It is strong and corrosion resistant, plus it's easy to machine and weld.

High-Strength 7075 Aluminum Rods and Discs

Originally developed for aircraft frames, uses for 7075 aluminum now include keys, gears, and other high-stress parts. It is often used as a replacement for 2024 aluminum because it’s stronger and provides similar performance in all other aspects.

High-Strength 2024 Aluminum Rods and Discs

While 2024 aluminum was initially designed for structural components in aircraft, it's now widely used when a high strength-to-weight ratio is needed, such as for gears, shafts, and fasteners. It offers similar performance to 7075 aluminum, but it’s not as strong.

Easy-to-Machine 2011 Aluminum Rods

2011 has the best machinability of all the aluminum alloys. It is the most selected aluminum for screws, tube fittings, hose parts, and other items that require extensive machining.

Copper, Brass, and Bronze

Ultra-Machinable 360 Brass Rods and Discs

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.

Oversized 932 Bearing Bronze Rods

Diameter is oversized to allow for finishing.

Plastic

Wear-Resistant Easy-to-Machine
Delrin® Acetal Resin Rods and Discs

Delrin® acetal resin, also known as acetal homopolymer, is stronger and stiffer than acetal copolymer.

Wear-Resistant Nylon Rods and Discs

Also known as nylon 6/6, this general purpose material is often used for bearings, gears, valve seats, and other high-wear parts.

Chemical-Resistant PVC Rods and Discs

Because PVC resists many acids and alkalies, it’s widely used for tanks and in chemical-processing applications. Also known as PVC Type 1.

Impact- and Chemical-Resistant PVC Rods

Offering greater impact resistance than standard PVC Type 1 with similar chemical resistance, this PVC Type 2 is widely used for parts that are subject to shock.

High-Temperature CPVC Rods

CPVC is just as chemical resistant as standard PVC Type 1 and can handle hotter temperatures up to 200° F.

Chemical-Resistant Slippery PTFE Rods and Discs

Known for its naturally slippery surface, PTFE surpasses most plastics when it comes to chemical resistance and performance in extreme temperatures.

Power Transmission

Flange-Mount Idler Rotary Shafts