4042139: GEAR

**Product Description: Spur Gear (4042139)** **General Characteristics:** - **Type:** Spur gear (most common and simplest type) - **Function:** Transmits power between parallel axes - **Design:** Cylindrical shape with teeth projecting radially **Technical Specifications:** - **Tooth Profile:** Straight teeth along the axis of the gear - **Pressure Angle:** Likely 14.5°, 20°, or 25° (common pressure angles for gears) - **Design Units:** Available in English (inches) or Metric (millimeters) **Material and Construction:** - **Material Options:** - **Metals:** Aluminum, brass, bronze, cast iron, carbon/alloy steel, hardened steel, or stainless steel - **Plastics:** Acetal, Delrin, nylon, or polycarbonate - **Combination:** Possible combination of plastic teeth with a metal insert for specific applications **Features:** - **Center Design:** May have a center bore for mounting onto a shaft or an integral shaft - **Tooth Quality:** Could feature ground teeth for smoother, higher-precision tooth form - **Anti-backlash:** Might include a mechanical assist to reduce play between meshing gear teeth **Applications:** Spur gears like the 4042139 are commonly used in various industrial equipment to: - Transfer mechanical motion - Control speed - Manage power transmission - Adjust torque in machinery **Quality Assurance:** If manufactured by a reputable company, the gear would likely undergo quality control measures to ensure proper functioning and longevity. **Note:** For more specific details about the 4042139 gear, consult the manufacturer's documentation or specifications, as the exact characteristics may vary depending on the intended application and design parameters.