GQZ PRB45 Integrated Agricultural Hub Bearing Unit 45mm Bore Multi-Layer Sealed Relubricable For Harvester Packer Roller

The PRB45 is an integrated heavy-duty agricultural hub bearing unit specially developed for harvester packer rollers. It adopts a double-row ball integrated structure with multi-layer composite sealing, supporting heavy radial loads in muddy, crop residue and high-dust farm environments, equipped with grease fitting for regular re-lubrication to extend service life.

Model

PRB45

Inner Bore Diameter (d)

45 mm

Overall Assembly Width (A)

55 mm

Inner Ring Width (B)

52 mm

Mounting Hole Size

4×12.1 mm

Mounting Pitch Circle Diameter (J)

208 mm

Structure

Double row integrated agricultural hub bearing unit

Material

GCr15 chrome bearing steel

Seal Type

Multi-layer composite dust & mud resistant seal

Relubricable

Yes, with grease nipple

Basic Dynamic Load Cr

51000 N

Basic Static Load C0r

39000 N

Fatigue Load Limit Pu

1638 N

Approx Net Weight

4.66 kg

• Integrated double-row bearing design delivers ultra-high heavy load capacity for continuous harvesting operation
• Multi-layer composite seals effectively block mud, crop debris, dust and water splash
• Built-in grease fitting supports on-site re-lubrication, greatly reducing maintenance frequency
• Integrated hub housing simplifies installation, no extra matching parts required
• Good anti-shock performance adapting to uneven farm field and heavy impact
• Custom options: high temperature grease, anti-rust surface coating, OEM laser marking

This bearing unit is widely used in:

• Combine harvester packer roller supporting system
• Large agricultural straw crushing and conveying equipment
• Farm soil tillage machinery and grain processing machines
• Heavy-duty agricultural roller wheel hub assembly

• 25+ years experience in professional agricultural special bearing manufacturing
• Exported to 50+ countries worldwide
• Rich experience in OEM & custom farm hub bearing projects
• Strict full-process quality inspection before shipment
• Fast response within 24 hours for technical consultation
• Stable bulk supply for agricultural machinery distributors

• Raw material hardness inspection for GCr15 bearing steel
• Precision grinding & superfinishing of raceway and inner bore
• Heat treatment metallurgy and hardness control
• Seal tightness, load & rotation smoothness testing
• Final dimensional and appearance inspection before delivery

Looking for a reliable bearing supplier?

• Fast quotation within 24 hours
• Professional engineer technical support
• Custom bearing unit solution suggestions
• Competitive factory direct price

Q1: Can you provide custom bearings?

Yes, we support OEM and custom production based on drawings and load requirements.

Q2: What is your delivery time?

Standard models: 7–15 days

Custom products: depending on specifications

Q3: Do you support large bulk orders for agricultural aftermarket?

Yes, we provide stable mass supply for long-term cooperative distributors.