Double Row Angular Contact Ball Bearing BD130-1SA 130*166*40mm

BD130-1SA is professional double row thin-wall angular contact ball bearing specially customized for mini excavator travel final drive gearbox, unified dimension inner bore d=130mm, outer diameter D=166mm, overall width B=34mm. SA suffix stands for open type structure without rubber seals, convenient for gearbox oil bath lubrication and continuous heat dissipation inside transmission box.

Adopts large 40° contact angle double row steel ball layout, can simultaneously bear combined heavy radial load + bidirectional large axial thrust load, effectively limit axial displacement of travel drive shaft during frequent forward/reverse rotation impact. Inner & outer rings and steel balls are made of GCr15 high-carbon chrome bearing steel through overall quenching and ultra-precision raceway grinding, stable hardness and anti-fatigue wear resistance. Standard nylon/steel cage optional, evenly separate steel balls to avoid collision abrasion under variable speed shock load. Widely used for Hitachi EX25/EX30/EX35 and other small excavator walking reducer core supporting spare parts, perfectly interchangeable with original OEM bearing.

• Ultra-thin wall compact outline design, perfectly match narrow installation space of mini excavator travel reducer, no modification required during replacement
• Double row 40° large contact angle structure, outstanding comprehensive bearing capacity for radial + bidirectional axial impact load, adapt frequent start-stop forward/reverse walking working condition
• Open SA no-seal design, fully immersed in gearbox lubricating oil for sufficient lubrication, excellent heat dissipation to avoid high-temperature ablation failure under long-time heavy-load walking
• High-precision quenched steel raceway and dense steel ball arrangement, low running noise, stable rotation without clearance shake during excavator climbing and heavy-load operation
• Two cage optional (nylon/steel), nylon cage low noise for light load; steel cage anti-deformation for long-term heavy impact mining construction sites
• Customizable options: C3 clearance upgrade, P5 high precision, OEM laser marking, special anti-rust heat treatment

Effectively reduce mini excavator travel gearbox bearing wear, extend overhaul cycle and lower construction equipment downtime maintenance cost

This BD130-1SA double row angular contact ball bearing is exclusive core spare part for small excavator walking transmission system:

• Hitachi EX25, EX30, EX35 mini excavator travel final drive gearbox main supporting bearing
• Small crawler digger, micro engineering machinery walking reducer original replacement bearing
• Construction machinery repair shop, excavator parts wholesale factory universal travel drive wear parts
• Light mining small digging equipment, farm land renovation mini excavator transmission assembly
• Aftermarket interchangeable bearing unit for 130mm bore double row excavator travel gearbox

Ideal heavy thrust thin-wall bearing solution for mini crawler excavator walking drive maintenance

• 25 years of professional excavator travel final drive special thin-wall angular contact ball bearing manufacturing experience
• BD130-1SA 1:1 fully interchangeable with original OEM bearing, consistent outline size, load rating and rotation precision
• Complete OEM & ODM customized service supporting high precision P5/P4, C3 clearance, steel/nylon cage customization
• Full-process strict inspection: raw material hardness test, raceway grinding precision, double row assembly parallelism and heavy alternating impact fatigue cycle test before delivery
• Professional excavator bearing technical team provides reducer housing & shaft tolerance matching installation guidance within 24 hours
• Stable mass production lines with preferential bulk wholesale price for long-term excavator parts distributors and machinery repair factories

We focus on original interchangeable size, strong anti-impact axial load performance and long-term win-win cooperation with global construction machinery spare parts buyers

• Raw material chemical composition and surface hardness inspection of GCr15 chrome bearing steel
• Precision turning, quenching tempering and raceway mirror superfinishing processing for inner and outer rings
• Constant temperature stress relief heat treatment to stabilize ring deformation resistance under alternating shock load
• Targeted performance testing: double row parallelism detection, 40° contact angle consistency test, combined radial-axial heavy load durability test
• Steel ball sorting, cage assembly and full dimensional & appearance recheck before anti-rust oil packaging and shipment

Every batch of BD130-1SA bearings passes full sampling reciprocating forward/reverse rotation fatigue test to guarantee stable long-term operation inside excavator travel gearbox

If you need heavy thrust BD130-1SA open double row angular contact ball bearings for Hitachi EX25/EX30/EX35 mini excavator travel final drive gearbox maintenance, send your inquiry to us directly.

You will receive full professional supporting services after submitting inquiry:

• Fast official factory quotation reply within 24 hours
• One-on-one travel reducer housing & shaft matching tolerance installation technical guidance by professional excavator bearing engineers
• Customized bearing solution suggestions including P5 high precision and C3 enlarged clearance variants
• Competitive direct factory bulk wholesale price for large excavator spare parts bulk orders

Send your required purchase quantity and excavator working construction environment to obtain detailed formal quotation

1. Q1: What does SA suffix mean for BD130-1SA?
   A1: SA represents open non-seal structure, suitable for gearbox internal oil bath lubrication; sealed RS variant BD130-1RSA is used for exposed dry rotating positions.

2. Q2: What’s the core advantage of double row 40° contact angle for excavator travel bearings?
   A2: Large contact angle can bear huge bidirectional axial thrust generated during excavator forward/reverse walking, avoid single row bearing axial clearance and abnormal noise failure.

3. Q3: Which excavator models fit BD130-1SA?
   A3: Mainly applicable to Hitachi EX25, EX30, EX35 series mini crawler excavator travel final drive reducer, fully interchangeable original replacement.