300mm Ball Screw Solutions for Precision Automation
Reliable high-load linear motion from a proven Chinese OEM factory. Custom lengths, leads, and accuracies available. Export-ready for USA projects.
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300mm Ball Screw | High-Precision Ground & Rolled | OEM Supplier China to USA - YIDI Motion
Meta Description: Sourcing 300mm ball screws? Precision-engineered for CNC machines, robotics, and heavy automation. C3/C5 accuracy, custom OEM/ODM. Fast quotes, global shipping from Hebei factory. Compliant with ISO standards.
Table of Contents
Linear Motion Demand is Shifting Fast
Machine builders in the US and Europe keep telling us the same thing: supply chains are unpredictable, and lead times from traditional sources stretch out to 20 weeks or more. We've seen it firsthand since YIDI Motion ramped up in 2020. Automation projects for semiconductor fabs and EV assembly lines can't wait that long.
A 300mm ball screw hits that sweet spot for mid-sized CNC routers and robotic arms. Not too short for light duty, not excessively long where deflection becomes an issue. Factories report they're swapping out cheaper acme screws for ball types to cut friction losses by half in high-cycle ops.
Take the rise in collaborative robots. Those cobots need smooth, backlash-free motion over 300mm travels. Our exports to Canada and Germany spiked last year because buyers found domestic prices 40-60% higher for equivalent specs.
It's not just cost. Precision matters. C5 accuracy on a 300mm shaft means repeatable positioning within microns, which keeps scrap rates down in aerospace machining.
We've shipped thousands to importers who integrate them into gantry systems. One pattern stands out: folks starting with samples, then scaling to full container loads once they test the preload stability.
Why Sourcing Ball Screws Feels Like a Headache
Procurement managers know the drill. You spec a 300mm ball screw with 16mm dia, 5mm lead, and suddenly quotes vary wildly. One supplier quotes ground finish at premium rates, another pushes rolled as "good enough." Then lead times hit 12 weeks, and quality? Hit or miss.
Deflection under load. That's a killer. Cheap imports warp at 5kN axial forces, throwing off your Z-axis calibration. We've inspected returns from competitors—uneven ball nut preload leads to premature wear.
Custom ends trip people up too. Flange mounts, anti-rotation pins—get those wrong, and retrofitting eats hours. Logistics add insult: ocean freight delays from Asia, plus duties that eat margins.
Importers tell us they worry about certifications. ISO 9001 is table stakes, but what about RoHS for EU resale? Or traceability for defense contracts?
Short story: many skip samples and regret it. A quick preload test reveals issues before bulk orders.
What Sets Our 300mm Ball Screws Apart
We've ground and rolled these in-house for years. Start with SCM440 steel, hardened to 58-62 HRC. That gives you fatigue resistance over 10,000 km of travel.
Ball nuts come standard with 4-6 rows, depending on load. Preload options from light to heavy—critical for reversing loads in pick-and-place machines.
Diameters from 16mm to 40mm suit most 300mm strokes. Leads: 5mm for fine control, 20mm for speed. Accuracy? C3 standard, C1 on request.
Ends machined to DIN 69051 standards. Truncated or whipped threads for easy coupling. Wipers keep out chips—vital in metalworking.
One detail buyers overlook: dynamic load rating. Ours hit 15-50kN based on size, with 50,000 hour L10 life at rated speeds.
- Ground shafts for ultra-precision (Ra 0.2-0.4µm)
- Rolled for cost-sensitive apps (still C7 capable)
- Custom nut blocks: flange, cylindrical, or miniature
- Greasable or sealed versions
- Anti-backlash guarantees
Operations guys like the low friction: 1-3% of load. Means smaller motors, less heat.
Need custom ends? Talk specs with our engineer.Technical Specifications Table
Here's a breakdown for common 300mm configurations. All tested to JIS B1192.
| Dia (mm) | Lead (mm) | Accuracy | Dyn Load (kN) | Weight (kg/m) | Price Range (USD) |
|---|---|---|---|---|---|
| 16 | 5 | C5 | 12.5 | 1.2 | $45-65 |
| 20 | 10 | C3 | 22 | 1.8 | $60-85 |
| 25 | 5 | C5 | 28 | 2.9 | $75-110 |
| 32 | 10 | C3 | 42 | 4.8 | $110-150 |
| 40 | 10 | C5 | 60 | 7.5 | $160-220 |
3000mm ball screw ball screw 3000mm 30mm ball screw
Prices FOB Tianjin. MOQ 10pcs. Custom configs +15-25%.
Where 300mm Ball Screws Excel
CNC mills. That 300mm stroke covers most table travels. Pair with linear guides for rigid Z motion.
Robotic welders. Reversing over that distance needs zero backlash. Our preload holds up.
Semicon handlers. Cleanroom compatible with optional seals. Low particle generation.
3D printers on steroids—industrial scale. High-speed leads for rapid prototyping.
Even medical imaging tables. Smooth, quiet operation under dynamic loads.
Contractors mix them into custom gantries. One US buyer used ours for solar panel aligners—hit 99.8% yield after swap.
Mounting and Alignment Tips from the Shop Floor
Support that 300mm shaft properly. Bearings at both ends, fixed-free setup common. Pre-align to 0.01mm/300mm.
Torque nut bolts to spec—overtighten strips threads. Use dial indicator for runout.
Lube right: lithium grease NLGI 2. Cycle it in before full load.
Warning: side loads kill ball screws. Keep carriages aligned.
Takes about 2 hours for a skilled tech. We've got CAD models for most mounts.
Send your drawing for fit check.Inside YIDI Motion: Built for Exports
100 employees, 30% senior techs. German/Japanese grinders ensure shaft straightness.
ISO 9001, RoHS, CE marked. Full traceability from billet to pack.
OEM/ODM our core. Branded for US distributors. 50+ countries served.
Lead time: 3-5 weeks stock configs, 6-8 custom. Samples in 10 days.
Factory in Shijiazhuang—close to Tianjin port. Containers load 500-1000pcs.
Feedback from Procurement Teams
Mark T., Operations Mgr, Ohio CNC Shop: "Ordered 20x5 C5 for router upgrade. Arrived in 4 weeks, perfect preload. Cut motor amps 25%. Will reorder."
Sarah L., Supply Chain, Texas Automation: "Custom flanges on 25mm dia. Engineer Adam sorted drawings fast. Quality beat THK samples."
John K., Importer, Toronto: "300mm rolled for cobot arm. Price half of local. No issues after 5000 cycles."
Raj P., Project Eng, California: "Heavy preload for vertical axis. Held position overnight. Logistics smooth to LAX."
Frequently Asked Questions
What's the max speed for a 300mm ball screw?
Up to 100m/min with proper cooling. Critical speed calc based on mount.
Ground vs rolled—which for my app?
Ground for micron precision (C3/C1). Rolled saves 30% cost for C7 ok.
MOQ and samples?
Samples 1-5pcs. Bulk 10+. Free engineering consult.
Shipping to USA?
Air 7-10 days, sea 25-35 to LA/NY. DDP options.
Warranty?
12 months. Covers mfg defects.
Ready to Source Your 300mm Ball Screws?
Avoid delays and quality risks. Get matched specs, pricing, and a shipping plan today.
HEBEI YIDI IMPORT AND EXPORT TRADING CO., LTD. | YIDI Motion | Since 2020
Written by Adam Li, Export Director at YIDI Motion
20+ years in linear motion exports. Helped 200+ US firms optimize supply.
