Ball Screw and Nut Assembly: High-Precision Linear Motion for Industrial Reliability
Sourcing dependable ball screw and nut assemblies? We've supplied OEM factories worldwide with ground and rolled options that handle heavy loads and high speeds. Get factory-direct pricing from China—lead times as short as 15 days.
Quick Navigation
Understanding Ball Screw and Nut Assemblies: The Backbone of Precision Motion
Ball screw and nut assemblies convert rotary motion into linear movement with minimal friction. Picture this: in a CNC machine churning out aerospace parts, the ball screw takes the torque from the motor and pushes the table forward smoothly, balls recirculating inside the nut to keep everything backlash-free. We've seen these components run for years in harsh factory floors without skipping a beat.
Ground ball screws offer micron-level precision, ideal for semiconductor tools. Rolled versions cut costs for general automation. The nut—whether single flange, double, or end cap style—holds dozens of steel balls that roll along helical grooves. Preload options eliminate play, crucial when tolerances are tight.
From our Shijiazhuang factory, we machine shafts from SCM415 or CF53 steel, hardened to 58-62 HRC. Nuts come in bronze, plastic, or metallic designs. Accuracy classes like C3 to C10 match DIN 69051 standards. Buyers often overlook dynamic load ratings— we've had engineers catch failing setups by matching our catalogs properly.
Lead times? Stock diameters from 12mm to 80mm ship in 7-10 days. Custom lengths up to 6 meters take 3-4 weeks. We grind external threads for high-helix leads, perfect for rapid traverse in lathes.
One common mix-up: confusing ball screws with acme screws. Balls give 90% efficiency versus 20-40% for trapezoidal threads. Power savings add up in continuous ops. We've consulted procurement teams ditching lead screws after backlash wrecked tolerances.
Whipple end machining lets nuts extend past the screw end—handy for compact robots. We stock common pitches: 5mm for fine control, 20mm for speed. Lubrication grooves every 300mm keep grease flowing.
Thermal growth is real. At 50m/min speeds, shafts expand 0.01mm/m per 10°C rise. We recommend compensated designs for temp swings in injection molding machines.
Where Ball Screw and Nut Assemblies Excel in Real-World Setups
CNC mills and lathes eat these up. A 25mm dia, 5mm pitch assembly drives Z-axis with 0.005mm repeatability. We've exported thousands to US machine shops rebuilding Haas VF series.
Robotics demand high acceleration. 40mm screws with 10mm leads handle 500kg payloads in Cartesian gantries. Automotive welders use our preloaded nuts to position torches dead-on.
Medical devices? Clean-room ground screws, P5 accuracy, in CT scanners. Solar trackers track panels with low-backdrive nuts holding position sans power.
- Packaging: High-speed fillers need 2m/sec velocities—our rolled assemblies deliver.
- Aerospace: Test stands with 100kN loads, C1 precision.
- 3D Printers: Budget 16mm options for hobby-to-pro upgrades.
- Semicon: Wafer stages, vacuum-compatible nuts.
Watch for dust ingress in woodworking. Sealed nuts extend life 3x. We've shipped to furniture factories in Vietnam where chips gum up cheaper imports.
Common Procurement Pitfalls with Ball Screws—And How to Dodge Them
Purchasing managers chase rock-bottom prices, only for nuts to brinell under load. Calculate critical speed: f = (60 / (2π)) * sqrt(EI / (0.98 L^2 m)). Overspin unsupported lengths and you get whipsaw.
Backlash kills accuracy. Non-preloaded nuts drift 0.1mm—fine for conveyors, disastrous for EDM sinks. Test with dial indicators post-install.
Lead time traps. Spot-market screws balloon costs 2x. Bulk OEM from us locks 20% savings. MOQs as low as 5 units for customs.
Spec drift happens. "High precision" means different things. Demand ISO 3408 certs. We've audited suppliers for EU buyers flagging non-compliant pitches.
Detailed Technical Specifications: Ball Screw and Nut Options
Our range covers precision ground (C5-C3) and rolled (C10) assemblies. Standard lengths to 3m, custom up to 6m. Dynamic loads from 5kN to 200kN.
| Dia (mm) | Lead (mm) | Accuracy | Dyn Load (kN) | Nut Type | Price Range (USD/pc) |
|---|---|---|---|---|---|
| 16 | 5 | C7 | 12 | Flange | 45-65 |
| 20 | 10 | C5 | 22 | Double | 70-95 |
| 25 | 5/10 | C3 | 35 | Cylindrical | 90-120 |
| 32 | 10 | C5 | 50 | Flange | 130-160 |
| 40 | 20 | C7 | 85 | Preloaded | 180-220 |
| 80 | 20 | C5 | 200 | Custom | Quote |
Prices FOB Tianjin, excl. customs. Volume discounts apply. Full catalog on request.
Your Step-by-Step Guide to Sourcing Ball Screw and Nut Assemblies
- Define load/speed: Use our calculator for life estimates (L = (C/P)^3 * 2e6 revs).
- Pick accuracy: C7 for most, C3 for metrology.
- Nut config: Flange for radial loads, double for axial.
- Request samples: Test fit before bulk.
- Verify certs: ISO 9001, RoHS compliance.
- Lock logistics: FCL from Tianjin to LA in 25 days.
Skip overseas middlemen—direct factory beats Alibaba markups. We've helped US importers shave 30% off landed costs.
Why Partner with YIDI Motion? Our Production Edge
Since 2020, we've grown to 100 staff in Hebei, 30% senior techs. German/Japanese grinders ensure Ra 0.2μm shafts. 50+ countries served: US, Germany, Japan top the list.
OEM/ODM full-service: Your logo on nuts, custom pitches. One-stop for linear guides, actuators, splines too.
Certifications: ISO 9001, CE, RoHS. 
Annual audits keep us sharp.
Precision Grinding—Mirror finishes daily.
Load Testing—Up to 300kN capacity.
Installation and Maintenance Realities
Align co-linear within 0.02mm/m or bind city. Use dial test indicators. Torque nuts to spec—overtighten strips threads.
Lube every 100km travel or 3000hrs. Grease points face down. Clean with kerosene, not solvents that swell seals.
End supports: Fixed-floating for lengths >1m. Bearings sized 4x screw dia.
We've fielded calls from sites ignoring critical speed—vibrations trashed nuts in weeks. Size properly.
Global Shipping: From Factory to Your Dock
FOB Tianjin. Air for samples (DHL 3-5 days). Sea LCL 20-30 days to US West Coast, $4-6/kg.
Packed in plywood crates, anti-rust papered. 100x 25mm assemblies per 20ft container.
Duties? HS 8483.40, check US HTS. We handle export docs.
What Buyers Say About Our Ball Screw Assemblies
Mike R., CNC Shop Owner, California
"Swapped Hiwin for YIDI C5 32mm—same precision, half cost. Backlash gone, machines run quieter. Lead time beat expectations."
★★★★★
Elena K., Automation Engineer, Germany
"OEM run of 200 double-nut assemblies. DIN-compliant, fast prototyping. Logistics smooth, no duties surprises."
★★★★★
Raj P., Robotics Firm, Canada
"40mm high-speed for pickers. Preload held through accel tests. Support team tweaked design overnight."
★★★★☆
Tom S., Procurement Mgr, Texas
"Bulk 500pcs rolled. Quality matched THK samples. Saved enough for new VMC."
★★★★★Frequently Asked Questions on Ball Screw and Nut Assemblies
What’s the difference between ground and rolled ball screws?
Ground: Hone machined for C3-C5 accuracy, lower noise. Rolled: Cold-formed grooves, C7+, economical for mid-precision.
How do I calculate expected life?
ball screw nut assembly ball screw assembly ball screws and nut
L10 = (C / P)^3 * 100km travel equiv., where C=dynamic rating, P=load.
Can you do custom lengths?
Yes, up to 6m. Ends machined to your blueprint.
OEM labeling?
Laser etch your brand. No MOQ premium.
Lead times for US?
Stock: 7 days. Custom: 20-30 incl. sea freight.
Ready to Source Your Ball Screw and Nut Assembly?
Direct from factory. No agents. Competitive edges on price, quality, speed.
HEBEI YIDI IMPORT AND EXPORT TRADING CO.,LTD.
16-1-1601 Aobeigongyuan, Chang'an District, Shijiazhuang, Hebei, China
Written by Adam Li, Export Director at YIDI Motion
15+ years in linear motion exports. Helped 200+ firms optimize supply chains.
Ball Screw and Nut Assembly | OEM Precision Supplier - YIDI Motion
Meta Description: High-precision ball screw and nut assemblies for CNC, robotics, automation. Factory-direct from China, C3-C10 accuracy, custom OEM/ODM. Fast global shipping, competitive pricing.
