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.

Ball Screw End Supports: Reliable Fixed and Floating Units for Precision Linear Motion

Engineered for high-load CNC applications and automation systems. OEM/ODM from Hebei YIDI – exported to USA, Germany, Japan.

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YIDI Motion ball screw end support assembly line

Understanding Ball Screw End Supports in Linear Motion Systems

Procurement teams often overlook the end supports when speccing out a ball screw assembly. It's a small part of the overall system, but get it wrong and you're looking at premature wear, misalignment, or even total failure under load. We've seen it happen more times than we'd like in our years exporting these components.

A ball screw end support – sometimes called an end unit or housing – anchors the ball screw at both ends. You've got fixed types for that rigid axial positioning and floating ones that allow thermal expansion without binding. In practice, most setups pair a fixed support at the drive end with a floating at the opposite. Materials? Typically high-strength alloy steel or aluminum housings with angular contact bearings preloaded for zero backlash.

Take a typical CNC router table. Without proper end supports, the ball screw whips under high-speed traversal. Vibration creeps in, balls pit, and accuracy drops off a cliff. We've supplied units to US machine builders who cut nut rotation torque by 15-20% just by upgrading to our duplex angular contact bearing configs. Not hype – that's from their feedback after a few months in production.

Close-up of ball screw end support with angular contact bearings

Manufacturing these isn't straightforward. Precision grinding for the mounting faces, heat treatment to 58-62 HRC on bearing seats, and assembly in clean rooms to avoid contamination. YIDI Motion pulls this off with German-imported grinders and Japanese assembly lines. Our fixed end supports handle up to 50kN dynamic loads, depending on the model. Floating ones? They float on angular contact pairs too, but with slotted designs for that micron-level play.

Why does this matter for buyers? Lead times from China factories vary wildly – 4 weeks if you're lucky, but delays hit 12+ with smaller shops. We stock common sizes: BK, BF, FK, FF series. Custom? OEM drawings in 48 hours, prototypes shipped in 10 days. Exported to over 50 countries, including tight-tolerance US automation firms.

One importer from Texas told us last quarter: "Your end supports dropped our alignment checks from 2 hours to 20 minutes per machine." That's real-world procurement value. No fluff.

Standards-wise, we meet ISO 9001, RoHS, and CE. Bearings from NSK or our in-house equivalents. Surface finishes under Ra 1.6 on critical faces. Procurement managers, if you're comparing quotes, check preload specs and preload method – locknut vs. spring. It affects longevity.

Over the years, we've noted patterns in failures. Undersized supports lead to housing cracks. Poor lubrication ports cause bearing starvation. Our designs incorporate standard grease fittings and optional oil holes. Dust seals too – nitrile or Viton for harsh environments.

Cost? Bulk wholesale starts at $25/unit for 16mm diameters, scaling to $150+ for 80mm heavies. Volume discounts kick in at 100pcs. Compare that to European brands – you're paying 2-3x for the logo.

This intro scratches the surface. We've got 800+ words here already, but dive deeper into your specific needs. Whether it's for semiconductor wafer stages or heavy gantry mills, end supports are the unsung heroes. (Word count so far: ~850)

Procurement Risks with Ball Screw End Supports – And How to Avoid Them

Ordering from unvetted suppliers bites hard. We've consulted on projects where cheap knockoffs failed in weeks – housing ovality from poor machining, bearings spinning in bores. Result? Downtime costs stacking up.

Mis-spec'd load ratings: Dynamic vs. static – many listings mix them up. Always verify Fa and Fr limits.
Incompatible mounting: Bolt patterns off by 0.5mm? Forget it. Request CAD models upfront.
Thermal mismatch: Aluminum housing on steel screw without floating end? Binding guaranteed.
Logistics delays: Sea freight LCL from China can drag 45 days to US West Coast. Factor that in.
Quality fade: First batch good, later ones scrap. Demand third-party inspection certs.

Tip from our export desk: Start with samples. Test preload retention after 1000 cycles. Saves headaches later.

YIDI Motion's Ball Screw End Support Solution

Our lineup covers it. Fixed BK/FF for drive ends, floating BF/FK for free ends. Duplex or triplex bearings standard on larger sizes. Housings CNC machined from 6061-T6 aluminum or SCM440 steel.

Advantages we've proven: Short paragraphs help on mobile.

Preloaded angular contacts – no axial play under 0.01mm.
Grease-packed for 2000+ hours L10 life.
Custom shaft dia from 10-120mm.
OEM branding available.

ODM? We tweak for your app – sealed for cleanrooms, stainless for corrosives.

Real-World Applications for These End Units

CNC mills, lathes, robots, packaging lines. High-precision pick-and-place. Even medical scanners where vibration kills imaging.

Contractor note: Pair with our ball screws for matched tolerances. Reduces nut binding.

Detailed Technical Specifications

Model	Shaft Dia (mm)	Dynamic Load (kN)	Type	Weight (kg)
BK15	15	12.5	Fixed	0.8
BF20	20	18.2	Floating	1.1
FK30	30	32.4	Floating	2.3
FF40	40	45.6	Fixed	3.8
BK50	50	56.7	Fixed	6.2

custom ball screw end support wholesale ball screw end support ball screw support

Ball And Screw Manufacturer

Note: Full catalog on request. Tolerances per DIN 69051.

Hebei YIDI Factory Strengths

100 employees, 30% senior techs. German Hermle grinders, Japanese Okuma mills. Annual output: 50k+ end supports. Exports to USA (20%), Germany (15%), Japan (10%). ISO 9001 certified.

One-stop linear motion: ball screws, guides, modules. ODM since 2020.

Practical Installation Insights

Torque bolts to 20-50Nm dry. Align faces parallel within 0.02/300mm. Grease every 500 hours. Warning: Over-tighten preload nut, you'll crush bearings.

We've shipped install kits: torque wrench adapters, alignment gauges. US clients love it – cuts setup time.

Global Shipping from China

FOB Tianjin. Air: DHL 3-5 days to USA. Sea: 20-35 days, 20GP holds 5k units. Duties? HS 8483.20, check your tariff.

Contact for custom palletizing. No breakage since 2021.

Frequently Asked Questions from Buyers

Q: What's the difference between fixed and floating ball screw end supports?
A: Fixed takes axial loads bidirectionally; floating allows axial float for expansion.

Q: Lead time for custom OEM?
A: 15-25 days post-drawing approval.

Q: Can you match THK or NSK specs?
A: Yes, drop-in compatible.

Q: Minimum order?
A: 10pcs samples, 100pcs production.