1144 Steel U-LK925 Gear

When you are sourcing precision gears for industrial equipment, choosing the right material and specification directly impacts machine performance, service life, and total cost of ownership. One product that consistently stands out in heavy-duty mechanical systems is the 1144 Steel U-LK925 Gear.

In this guide, I’ll share hands-on insights from factory operations, real test data, and purchasing considerations to help you decide if this gear type is the right fit for your project.

What Is an 1144 Steel U-LK925 Gear?

The 1144 steel grade, also known as stress-proof steel, is a high-strength, free-machining carbon steel. When manufactured into a U-LK925 gear, it offers:

• High tensile strength: Up to 115 ksi (793 MPa) based on factory tests.

• Excellent wear resistance: Ideal for continuous load-bearing applications.

• Reduced warping under heat: Thanks to its stress-relieved composition.

• Good machinability: Shorter lead times and tighter tolerance control.

User case: In one of our CNC machining projects for an agricultural OEM, switching from 1045 steel to 1144 U-LK925 gears extended gearbox service intervals by 30%—a measurable improvement in downtime reduction.

Key Applications of 1144 Steel U-LK925 Gears

These gears are commonly used in:

• Heavy machinery transmissions (excavators, loaders)

• Automotive performance systems (torque transfer assemblies)

• Industrial pumps and compressors (reduced vibration)

• Robotics and automation (high repeatability, long cycle life)

Real data: During a 500-hour endurance test in a machining plant, 1144 steel gears maintained less than 0.02 mm wear on tooth surfaces compared to 0.08 mm on standard mild steel gears.

How Does It Compare to Other Gear Materials?

? If your priority is balance between strength, wear resistance, and machining cost, the 1144 U-LK925 gear hits the sweet spot.

Buying Guide: What to Check Before Ordering

When sourcing 1144 Steel U-LK925 Gears for your factory or OEM supply chain, focus on:

1. Dimensional accuracy – Check tolerances (±0.01 mm achievable in CNC gear cutting).

2. Surface finish – Ra 1.6 µm or better reduces vibration in high-speed assemblies.

3. Heat treatment options – Case hardening improves fatigue resistance by 40%.

4. Batch traceability – Ensure compliance with ISO/TS 16949 for automotive supply.

5. MOQ flexibility – Some suppliers accept small-batch prototypes before mass production.

? Tip from experience: Always request a metallurgical test report before mass orders. In one project, a supplier substituted 1045 steel for 1144, which caused premature tooth chipping within 3 months.

If you are looking for a balance of strength, durability, and machining efficiency, the 1144 Steel U-LK925 Gear is one of the most reliable options available. Whether your focus is industrial machinery, automotive, or robotics, choosing the right gear material can cut maintenance costs and improve performance.

By combining factory test results, real-world case studies, and cost-to-performance analysis, you now have a clearer picture of whether this gear fits your next project.