Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When your motion-control build demands a gear that won't slip, strip, or flex under load, a poorly specified pinion is the first point of failure. Engineers, makers, and machine builders who need repeatable, low-backlash power transmission rely on a correctly rated spur gear matched to their motor shaft and drive ratio. These 1 Mod spur gears are designed for that exact use case — delivering consistent mesh engagement across a wide tooth-count range.
Each gear is machined from 45# medium-carbon steel, offering a balance of hardness and machinability suited to moderate-to-high torque applications. The module (Mod) is 1, meaning the tooth pitch is standardized at 1 mm per tooth, making these gears directly interchangeable with any other Mod 1 rack, pinion, or mating gear. Outside diameters range from 62 mm (≈2.44 in) for the 60T variant up to 152 mm (≈5.98 in) for the 150T variant, with tooth counts spanning 60T through 150T to cover a broad range of gear ratios.
Typical use cases include CNC router axis drives paired with a Mod 1 rack for linear motion, stepper or servo motor pinion assemblies in 3D printer extruder gearboxes, and rotary indexing tables or robotic joint reduction stages where a compact flat gear profile is required. The standardized Mod 1 tooth form also makes these gears suitable as replacement pinions in light industrial conveyor and packaging machinery.
Machined from 45# carbon steel for a tensile strength typically in the 600–800 MPa range, providing solid resistance to tooth bending fatigue under cyclic loading in drive and transmission applications.
Module 1 (1 mm/tooth) is one of the most widely used metric gear standards. These gears mesh seamlessly with any Mod 1 rack or mating gear, simplifying sourcing and replacement across CNC and automation builds.
With 39 tooth-count options from 60T to 150T (OD 62–152 mm / 2.44–5.98 in), you can dial in the exact gear ratio needed for your motor drive, reducing stage, or indexing application without custom machining.
The straight-tooth spur profile transmits torque efficiently between parallel shafts with no axial thrust load, making installation and alignment straightforward in CNC gantries, robotic joints, and motor pinion assemblies.
Order 1 Pcs for prototyping or a direct replacement, or choose the 3 Pcs pack for multi-axis builds, spare inventory, or staged drive systems where matched gears are required across multiple motor outputs.
Designed for use in CNC router rack-and-pinion axes, stepper/servo motor gearboxes, rotary indexing tables, and light conveyor drives — anywhere a reliable, standardized Mod 1 flat gear is specified.
| Module (Mod) | 1 |
|---|---|
| Material | 45# Medium-Carbon Steel |
| Tooth Count Range | 60T – 150T (39 options) |
| Outside Diameter Range | 62 mm – 152 mm (2.44 in – 5.98 in) |
| Pressure Angle | 20° (standard) |
| Gear Type | Spur (straight tooth, parallel shaft) |
| Bore Diameter | See variant options |
| Hub / Face Width | See variant options |
| Surface Finish | See variant options |
| Packing Quantity | 1 Pcs or 3 Pcs (select above) |
Select the tooth count based on your required gear ratio and available space. Divide the driven gear teeth by the driving gear teeth to get the ratio. For example, pairing a 60T gear with a 20T pinion gives a 3:1 reduction. Larger tooth counts (e.g., 120T–150T) suit slower, higher-torque output stages, while smaller counts (60T–80T) are common for motor pinions in CNC rack-and-pinion drives.
Module (Mod) defines the tooth size in metric gear standards — Mod 1 means 1 mm of pitch diameter per tooth. Any two gears or a gear and rack with the same module and pressure angle (20° standard) will mesh correctly. If your existing rack or mating gear is labeled Mod 1 or M1, these gears are directly compatible.
45# carbon steel typically has a tensile strength of 600–800 MPa and yield strength around 355 MPa, making it suitable for moderate-to-high torque transmission in CNC, robotics, and light industrial drives. For very high-shock or continuous heavy-load applications, consider whether a heat-treated or alloy steel gear is more appropriate. Contact us if you need to confirm load ratings for your specific application.
45# carbon steel is not inherently corrosion-resistant. For outdoor, humid, or washdown environments, we recommend applying a rust-inhibiting lubricant or grease to the gear teeth and bore, or considering a stainless steel or coated alternative. For indoor CNC and robotics use in controlled environments, standard lubrication is sufficient for long service life.
Bore diameter varies by tooth count and outside diameter. Please refer to the variant detail page or contact us to confirm the bore size for your selected tooth count before ordering. Many applications also require a set screw, keyway, or bore modification to secure the gear to the shaft — confirm your shaft diameter and retention method in advance.
Yes. These Mod 1 spur gears are commonly used as pinions in CNC router rack-and-pinion axis drives. Pair them with a Mod 1 steel or nylon rack for smooth, repeatable linear motion. Smaller tooth counts (60T–80T) are typical for motor pinions in this application. Ensure your motor shaft bore matches the gear bore, and use a set screw or keyway for positive retention.
The 1 Pcs option is ideal for single-axis builds, prototyping, or direct replacement of a worn gear. The 3 Pcs pack offers a per-unit cost saving and is suited for multi-axis CNC machines, robotic systems with multiple drive joints, or keeping spares on hand for maintenance. Both options ship the same gear — only the quantity differs.
