What Is a Ball Screw and How Does It Work?

A ball screw is a mechanical linear actuator that converts rotary motion into linear motion using ball bearings to minimize friction and increase efficiency and accuracy.

What Types of Ball Screws Do You Offer?

We offer a variety of ball screws including ground ball screws, rolled ball screws, miniature ball screws, and high-lead ball screws to meet different precision and load requirements.

How Do I Choose the Right Ball Screw for My Application?

Selection depends on factors like load capacity, lead accuracy, speed, stroke length, and whether the application demands high positioning precision or heavy-duty performance.

What Is the Difference Between Ground and Rolled Ball Screws?

Ground ball screws offer higher precision and smoother motion, ideal for high-accuracy applications. Rolled ball screws are more cost-effective and suitable for general-purpose use.

What Maintenance Is Required for a Ball Screw?

Regular lubrication is essential. Also, keep the screw clean from debris and inspect for wear, preload loss, or unusual noise to ensure optimal performance and service life.

High-Precision Spline Bearings: Boost Load Capacity by 50% with OEM Customization – Free US Shipping Quote in 24h

As a US operations manager, you're battling high costs, unreliable quality, and slow deliveries for linear motion parts. YIDI Motion's ball spline bearings deliver factory-direct precision at 30% lower prices, with rapid shipping to USA ports.

Get Free Quote in 24h

YIDI Motion Advanced Spline Bearing Factory

The Hidden Costs Plaguing Your Spline Bearing Supply Chain

You know the drill: ordering spline bearings for your CNC machines or robotic arms shouldn't mean gambling on quality. Yet, in 2026, US buyers face escalating challenges.

High Prices Eating ROI: Traditional US suppliers charge 40-60% premiums due to labor costs. A standard 25mm spline bearing? Easily $150+ per unit vs. our $95 factory price.
Low Quality = Frequent Failures: Inferior imports lead to 37% higher downtime (per McKinsey manufacturing report 2025). Worn splines cause backlash, vibration, and scrapped parts.
Skyrocketing Shipping Costs: Delays from Europe/Asia average 6-8 weeks, with tariffs pushing logistics to $50/kg. Your ops team waits while production halts.
Inconsistent Specs: Off-spec tolerances exceed 0.02mm, ruining precision in high-speed apps like automation lines.
No Customization: Stock parts don't fit OEM needs, forcing redesigns and extra tooling costs up to $10K.
Poor After-Sales: No support for integration means your engineers waste weeks troubleshooting.

Result? 25% average cost overrun on linear motion projects. Ready to fix this? Discover our spline bearings below.

YIDI Motion Ball Spline Bearings: Precision Engineered for US Demands

Founded in 2020, HEBEI YIDI IMPORT AND EXPORT TRADING CO.,LTD. (YIDI Motion) operates a 100-employee factory with 30% senior technicians. We import German/Japanese CNC machines for micron-level precision. Exported to 50+ countries including USA, our spline bearings (aka ball spline bearings) combine rotation and linear motion seamlessly.

What sets us apart? Powerful factory capacity (50K units/month), full quality assurance, OEM/ODM design, and high-speed delivery (2-4 weeks to US West Coast).

5 Key Advantages Over Competitors

Cost Leadership: Direct from China's efficient supply chain – 30-50% savings vs. US/EU without quality loss.
Unmatched Quality: Hardened chrome steel (58-62 HRC), P5 precision class, RoHS compliant for US regs.
OEM/ODM Flexibility: Custom spline profiles, lengths up to 2000mm, integrated seals.
Fast Global Delivery: DHL/FedEx for samples (3-5 days), sea freight 15-20 days to LA/NY ports.
One-Stop Linear Motion: Pair with our ball screws, linear guides for complete systems.

Detailed Spline Bearing Technical Specifications

Our ball spline bearings feature a splined shaft with Gothic arch grooves and a nut with 4-6 rows of circulating balls. This design handles radial, moment, and torsional loads up to 50kN dynamic, with speeds to 3m/s. Low friction coefficient (μ=0.001-0.003) ensures 50,000+ hours L10 life.

Model	Shaft Dia (mm)	Nut Width (mm)	Dyn. Load (kN)	Stat. Load (kN)	Max Speed (m/s)	Accuracy (μm)
SBS15	15	32	12.5	20.1	3.0	C0: 7
SBS20	20	45	21.8	33.2	2.5	C0: 8
SBS25	25	56	31.4	50.3	2.0	C1: 10
SBS30	30	63	42.1	68.5	1.8	C0: 9
SBS40	40	80	65.2	105.8	1.5	C1: 12

Materials: Shaft: SCM415 alloy steel (induction hardened); Nut: Aluminum alloy housing with steel retainer. Seals: Labyrinth + contact for IP65 dust/water resistance. Preload options: Light/Medium/Heavy for zero-backlash performance.

Performance Data and Calculations

Technical depth: Rigidity exceeds traditional bearings by 2-3x due to multi-row balls in spline grooves. Moment load capacity M = (Dyn Load x Pitch Circle Dia)/2. Example: SBS25 handles 15Nm torsion at 2m/s.

Fatigue Life Formula: L10 = (C/P)^3 x 10^6 revs (ISO 14728-1). Our bearings achieve 2x industry average under 80% load.

Friction Torque: <1% of axial load – ideal for servo-driven actuators.
Temperature Range: -10°C to +80°C standard; -40°C to +120°C optional.
Lubrication: Grease-packed NLGI #2; relubrication intervals 5000km stroke.

Real-World Applications and Case Studies

Spline bearings excel in scenarios demanding simultaneous rotation + translation:

Industrial Robotics: Pick-and-place arms (e.g., Fanuc-compatible). Case: US auto parts maker swapped to SBS30, cut cycle time 28%, ROI in 4 months.
CNC Machining: Spindle feed axes – handles 50kN thrust without whip.
Automated Guided Vehicles (AGVs): Steering columns; low backlash for precise navigation.
Medical Devices: Surgical robots (FDA-compliant options available).
Aerospace Simulators: High-rigidity for 6DOF motion platforms.

Micro-CTA: Need custom specs? See FAQ or contact us.

FAQ: Your Spline Bearing Procurement Guide

What is a spline bearing and how does it differ from linear bearings?

A ball spline bearing allows both linear translation and shaft rotation via splined grooves with circulating balls. Unlike plain linear bearings, it handles torque/moments up to 5x higher. Perfect for actuators.