Mechanical Components.
Mechanical Components Wholesale – Bearings, Shafts, Gears & Couplings | SIYUNJO INTERNATIONAL
About This Category
Our Mechanical Components line covers essential transmission and motion control parts for industrial machinery. With access to China’s comprehensive mechanical parts supply chain in Zhejiang, Jiangsu, and Shandong provinces, we offer competitive pricing across a wide range of standard and custom components.
Wholesale mechanical components including deep groove ball bearings, linear shafts, spur gears, jaw couplings and V-belts. Standard and custom sizes. ISO 9001 certified. MOQ 100 units. Factory-direct pricing.
Product Range:
| Product | Specifications | Material | Standards | MOQ | FOB Price |
| Deep Groove Ball Bearings | 6000-6020 series, 10-100mm bore | Chrome steel GCr15 | ISO, DIN | 500 units | $0.50-$8.00 |
| Linear Shafts | 8-50mm diameter, 500-2000mm length | Chrome-plated 45# steel | h6 tolerance | 100 units | $5-$30 |
| Spur Gears | Module 1-6, 10-100 teeth | 45# steel, hardened | DIN 867 | 100 units | $2-$15 |
| Jaw Couplings | 14-65mm OD, aluminum + polyurethane spider | Aluminum 6061 | DIN | 100 units | $3-$12 |
| V-Belts | A/B/C/D sections, various lengths | Rubber + polyester cord | ISO 4184 | 500 units | $1-$8 |
Key Features:
1. Deep Groove Ball Bearings:
· High-carbon chrome steel (GCr15) construction provides excellent wear resistance and fatigue life.
· Precision-ground raceways ensure smooth, quiet operation with minimal vibration.
· C3 internal clearance accommodates thermal expansion during high-speed operation.
· Rubber seal (2RS) or metal shield (ZZ) options protect against contamination.
· Pre-lubricated with lithium-based grease for maintenance-free operation.
· Suitable for electric motors, pumps, gearboxes, and industrial machinery.
2. Linear Shafts:
· Induction-hardened to 60-62 HRC with chrome plating (20-30um thickness) for superior wear and corrosion resistance.
· Precision ground to h6 tolerance class for accurate linear motion.
· Straightness within 0.05mm per meter ensures smooth operation with linear bushings.
· Available in standard lengths from 500mm to 2000mm with cut-to-length service for custom requirements.
· Suitable for linear motion systems, automation equipment, 3D printers, and CNC machines.
3. Spur Gears:
· Made from 45# medium carbon steel with tooth surface hardening (45-55 HRC) for durability.
· Precision hobbing ensures accurate tooth profiles for smooth, quiet operation.
· Standard module range M1-M6 covers most industrial applications.
· Available with or without keyway and set screw.
· Suitable for speed reducers, conveyor systems, packaging machinery, and general power transmission.
4. Jaw Couplings:
· Aluminum 6061 hubs provide lightweight, corrosion-resistant construction.
· Polyurethane spider element absorbs vibration and shock loads, protecting connected equipment.
· Fail-safe design — the spider acts as a mechanical fuse, shearing under extreme overload to prevent equipment damage.
· Standard shore hardness 92A spider for general applications, 98A for higher torque requirements.
· Suitable for connecting motors to pumps, gearboxes, and other rotating equipment.
5. V-Belts:
· Premium rubber compound with polyester cord reinforcement provides high tensile strength and flexibility.
· Molded cog design reduces bending resistance and heat buildup for improved efficiency.
· Static conductive construction dissipates static electricity for safe operation.
· Oil and heat resistant up to 60C continuous operation.
· Suitable for industrial machinery, agricultural equipment, HVAC systems, and automotive applications.
Quality Standards
· All mechanical components manufactured in ISO 9001:2015 certified facilities. Bearings comply with ISO 15, DIN 625 standards. Shafts comply with ISO h6 tolerance standard. Gears comply with DIN 867, ISO 53 standards. Couplings comply with DIN 740 standard. Belts comply with ISO 4184, DIN 2215 standards.
· Each batch undergoes dimensional inspection (CMM measurement), material verification (spectrometer analysis), hardness testing (Rockwell), and performance testing (noise, vibration, temperature rise).
· Material test certificates (MTC) and dimensional inspection reports provided with each shipment.
Packaging & Shipping
· Standard packaging: Bearings in rust-proof paper + polybag + carton, 10-50 pieces per box. Shafts in protective paper wrap + wooden crate. Gears in individual polybag + carton with foam dividers. Couplings in individual box + master carton. Belts in polybag + carton, 10-50 pieces per box.
· Container loading: varies by product — bearings 50,000-100,000 pieces per 20GP, shafts 5,000-10,000 pieces per 20GP.
· Shipping: FOB Shanghai/Shenzhen, CIF to major global ports.
Ordering Information
· Sample policy: 5-10 pieces per SKU at production cost.
· Volume discounts: available for quantities above 1,000 pieces for bearings, 500 pieces for shafts and gears.
· Custom specifications: minimum 500 units for non-standard sizes.
· Payment terms: 30% deposit, 70% before shipment. Stock items ship within 7-10 days, custom items 20-30 days.
Applications
· Industrial distributors, machinery manufacturers, maintenance departments, and OEM parts suppliers.
Need mechanical components? Contact claire@siyunjo.com for specifications and volume pricing.