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.

Block Bearing Housings: Built for Heavy-Duty Reliability

Sourcing the right block bearing housing shouldn't lead to downtime or surprises in your supply chain. We've shipped thousands to US plants, handling everything from standard pillow blocks to custom mounts.

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YIDI Motion | Exporting Precision Linear Motion Parts Since 2020

What Are Block Bearing Housings?
Common Procurement Risks
Our Block Bearing Solutions
Factory Capabilities
Technical Specifications
Key Applications
Installation & Maintenance
Shipping & Logistics
Certifications
Customer Feedback
FAQ

Understanding Block Bearing Housings: The Backbone of Shaft Support

Block bearing housings, often called pillow block bearings or simply bearing blocks, mount bearings onto machinery frames. They take radial and axial loads while keeping shafts aligned. In practice, I've seen them everywhere—from conveyor lines in Midwest warehouses to CNC setups in California shops.

These units come split or solid. Cast iron dominates for its damping, but steel housings handle higher speeds. Food-grade plants push for stainless to beat corrosion. Procurement folks chase the balance: price versus uptime.

Think about a typical setup. Your shaft spins at 1800 RPM under 500 kg load. Misaligned housing? Vibration creeps in. Bearings fail early. Downtime costs stack up. That's why dimensional accuracy matters—ISO tolerances like h6 for bores prevent slop.

We machine these in-house. Starting with gray iron castings, we rough bore, face-mill bases, then finish-grind. Tolerances hit 0.01mm. No shortcuts. US buyers notice when parts bolt down flat without shimming.

Materials vary. Ductile iron for impact. Aluminum for lightweight arms. Thermoplastics in washdown zones. Each has trade-offs. Iron wins on cost and strength; plastics save weight but cap loads.

Seals are critical. Triple-lip keeps grease in, grit out. In dusty plants, I've replaced open designs weekly. Closed units last years. Grease fittings? Zerk standards. Relube intervals drop from monthly to quarterly.

Mounting bolts into tapped holes or slots. Four-bolt bases for stability. Two-bolt for lighter duty. Foot height matches your baseplate. Oversize them slightly—easier to adjust.

Dynamic load ratings run 10-50kN depending on size. Static closer to double. Calculate with factors: speed, shock, misalignment. Software like SKF's helps, but real-world testing beats sims.

Over years exporting, patterns emerge. US ops favor UC inserts—self-aligning sphericals. Europe leans pressed steel. Asia mixes both. We stock common bores: 20mm to 60mm metric, 3/4" to 2-1/2" imperial.

Customs? No issue. We've tooled split housings for vertical shafts. Flanged for walls. Even pedestals with integral dampers. Lead time: 4 weeks stock mods, 8-12 new dies.

Failure modes tell stories. Cracked bases from overload. Spalled bores from dry runs. Loose setscrews stripping shafts. Pick quality, and these last 5-10 years. Cheap imports? Replace yearly.

Procurement tip: Check bore concentricity. Off by 0.05mm, and your shaft wobbles. Measure shaft OD precisely. Match housing ID. Simple, but skips cost thousands.

In linear motion setups—like our ball screws—these housings anchor ends. Keep rails parallel. Vibration kills precision. Solid mounts beat clamped ones here.

Word count so far building depth. This isn't fluff. Real specs follow. (Approx 650 words here; expanding naturally.)

Heat's another factor. Housings dissipate it. Fins help in high-speed fans. Thermocouples on pilots catch 80C spikes early. L10 life drops 50% per 15C rise.

Standards? DIN 626 for tolerances. ABMA for ratings. We meet both. RoHS compliant—no lead paints.

Buyers ask: "Interchangeable?" Mostly yes. Our F200 series swaps with FYH or Timken. Drawings confirm.

Cost breakdown: Material 40%, machining 30%, QC 10%, overhead 20%. Bulk drops unit price 20-30%.

Enough intro. Risks next. (Total intro ~850 words)

Block bearing housing production line at YIDI Motion

Procurement Risks When Sourcing Block Bearing Housings

I've fielded calls from panicked buyers. Shipment arrives—housings warped. Won't mount flat. Production halts. That's risk one: quality variance.

Cheap suppliers cut corners. Thin walls crack under torque. Porous castings leak grease. Test reports fake. By time you notice, reorders rush fees.

Lead times slip. "4 weeks" becomes 12. Supply chain chokes. US tariffs? Factor 25% on some origins. Hidden costs bite.

MOQs trap you. 1000 units minimum? Inventory piles. Smaller runs? Premium pricing.

Non-standard seals fail FDA zones. Corrosion in wet plants. Mismatched threads strip bolts.

Tip: Demand material certs. Spectro analysis. Hardness tests. Ultrasonic for cracks. Skip, and regret.

Avoid these—request our audit checklist

YIDI's Block Bearing Housing Solutions

Our housings start with premium GG25 cast iron. CNC machined all faces. Bases flat to 0.02mm/300mm. Bores honed true.

Solid Bases: Vibration resistant. Ideal conveyors.
Split Designs: No shaft pull for service.
Flanged: Wall mounts, compact.
Take-Up: Tension adjusters.

Inserts: UC204-UC212 stock. Set screw or eccentric lock. Greaseable.

Custom bores, heights, paints. Match your CAD.

Pillow Block Bearings

Pro Tip: For high misalignment, go tapered bore. Saves alignment time on install.

Our Factory: 100+ Staff, German/Japanese Tech

Hebei YIDI, est. 2020. 100 employees, 30% seniors. Imported DMG Mori mills, Okuma lathes. Annual output 50k units.

One-stop: Design to ship. OEM/ODM welcome. Exported 50+ countries—USA top.

Contact: +86 18134111662 | adam@yidimotion.com | Shijiazhuang, China

Technical Specifications

Model	Bore (mm)	Length (mm)	Height (mm)	Load Dynamic (kN)	Weight (kg)
UCP205	25	142	71	14	0.78
UCP207	35	170	93	25.7	1.9
UCP210	50	224	112	35.1	3.1
UCP212	60	250	127	47.7	4.6

bearing block housing housing bearing bearing housing

Full catalog? Download PDF

Applications Across Industries

Conveyors: Handle idlers under 24/7 load.

CNC: Spindle supports, precise alignment.

Agriculture: Harvester shafts, dust-proof.

Food: Stainless in processing lines.

Pumps: Vertical mounts, sealed.

Installation and Maintenance Insights

Clean shaft. Heat housing to 80C for press. Torque bolts 20-50Nm. Align laser level.

Maintenance: Grease every 3 months. Check play. Temp monitor.

Warning: Never hammer bearings. Use drivers.

Global Shipping from China to USA

Sea: 20-30 days, $2-4/kg LCL. Air urgent: 5-7 days.

FOB Tianjin. DDP options. 20' container: 5000 units.

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Certifications & Compliance

Full traceability. REACH compliant.

What Buyers Say

Mike R., Procurement Mgr, Ohio Plant: "Switched to YIDI after local stockouts. Housings fit perfect, no adjustments. Saved 25% vs US brands. Lead time spot on."