3776-2 Bearing: Reliable Double-Row Tapered Roller for Heavy Axle Loads
Factory-direct from Hebei YIDI – OEM specialist serving USA importers
Procuring the right bearing can make or break a production run. We've seen it time and again—buyers chasing cheap imports only to face early failures under load. The 3776-2 bearing changes that equation. This double-row tapered roller design handles radial and axial forces like few others, especially in axle assemblies or conveyor setups where misalignment sneaks in.
At YIDI Motion, we've machined thousands of these since 2020. Not the flashy new models, but the workhorses like 3776-2 that keep American machine shops humming. Think truck axles, agricultural harvesters, or heavy earthmovers. It's built to ISO 9001 specs, with our German-imported grinders ensuring cone and cup tolerances hit within microns.
Why Procurement Managers Turn to 3776-2 Bearings Now
Supply chains are tighter than ever. Lead times from Europe stretch to 16 weeks, and spot prices fluctuate wildly. We've fielded calls from Texas distributors last month alone, scrambling after a competitor's stock dried up. The 3776-2 steps in as a drop-in replacement for legacy Timken or SKF units in imperial sizes.
It's not just about the bore—2.165 inches standard—or the OD at 3.671 inches. The real edge comes from preload stability. Under 50,000 lbs dynamic load, it maintains contact angles without brinelling. We've tested pairs in our Shijiazhuang facility against vibration profiles mimicking USA Midwest operations.
Procurement Risks You're Likely Facing
Skip the horror stories. One Midwest importer shared how off-spec bearings from unnamed Alibaba sellers led to $45k in downtime. Spalling started at 800 hours, not the rated 5,000+. With 3776-2, we guarantee preload retention through heat-treated 52100 steel.
- Counterfeit risks: Visual checks miss micro-cracks from poor forging.
- Lead time traps: 4-6 weeks from us vs. 3 months elsewhere.
- Misalignment pitfalls: Single-row alternatives fail faster in combined loads.
- Cost creep: Hidden duties eat margins on small orders.
Our advice? Vet suppliers on dynamic load ratings first. Then check cup rigidity. We've helped ops managers avoid these by supplying matched sets.
3776-2 Bearing: Technical Specs at a Glance
| Parameter | 3776-2 Value | Standard Tolerance |
|---|---|---|
| Bore Diameter | 55mm (2.165 in) | h6 |
| Outer Diameter | 93.26mm (3.671 in) | H7 |
| Width (Assembly) | 53.975mm (2.125 in) | ISO 492 |
| Dynamic Load (C) | 180 kN | Min |
| Static Load (C0) | 225 kN | Min |
| Material | Through-hardened 52100 Chrome Steel | Vacuum Degassed |
| Lube | Grease Packed (Polyurea) | -30°C to 120°C |
| Weight | 1.42 kg | Per Unit |
These specs match or exceed legacy OEM requirements. Matched pairs available for zero preload setups.
Where 3776-2 Bearings Thrive in Operations
Agricultural gear takes a beating—uneven fields, dust ingress. We've supplied 3776-2 sets to harvester rebuilds in Iowa. The tapered design absorbs thrust from angled loads better than ball types.
In manufacturing, consider paper mills or steel rollers. Radial forces spike during startups. Contractors tell us these last 2x longer than angular contacts in similar duties.
- Axle hubs on Class 8 trucks
- Conveyor idlers in mining
- Wind turbine gearboxes (low-speed stage)
- Construction excavator swings
- Marine propeller shafts
Inside YIDI Motion: Our Factory Edge
100 hands strong, 30% senior techs. Japanese Okuma CNCs handle the ID grinds; German Kapp for profiles. No outsourcing—we own the heat treat line. Exports hit 50+ countries, USA tops the list.
ISO 9001:2015 audited yearly. RoHS compliant for no heavy metals. OEM for brands like John Deere aftermarket. ODM? Tell us your preload spec, we'll prototype in 3 weeks.
Container loads: 1,200 units per 20ft. FCL rates competitive from Tianjin port.
Installation Realities & Maintenance
Press-fit the cup first—use a shop arbor, not hammer. Torque inner ring to 200 Nm dry. Grease every 500 hours or oil bath for high-speed.
Warning: Over-preload kills life fast. Measure endplay at 0.05-0.10mm. We've seen rebuilds fail from ignoring this.
- Align housing bore to IT6.
- Heat cone to 80°C max.
- Run-in at 30% load first week.
- Monitor temp rise under full duty.
USA Logistics: What to Expect
Door-to-door 25-35 days via sea. DDP options clear customs. Samples ship DHL in 5 days. MOQ 50pcs for best rates; negotiate on volume.
No surprises—our forwarder handles ISF filings for FDA if needed, though bearings skip that.
What Buyers Are Saying
Mark T., Procurement Lead, Texas Tractor Parts 
"Switched to YIDI's 3776-2 after SKF delays. Held up in 10-ton baler tests. Pricing beat quotes by 18%. Will reorder."
Sarah L., Ops Manager, Ohio Steel Fab 
"Needed matched pairs quick. Adam sorted customs. Zero defects in first 1,000 hours. Solid partner."
Raj P., Distributor, California 
"OEM run for ag equipment. Tolerances spot-on. Lead time half what Europe promised. Happy customer."
Carlos M., Engineer, Florida Marine 
"Corrosion resistance impressed in salt tests. Better than expected for price. Thanks for the tech support."
Ready to Source Your 3776-2 Bearings?
Factory pricing starts at volume. Custom seals or preloads? No problem.
+86 18134111662 | adam@yidimotion.com
Adam Li
54217 bearing 6304 bearing 32007 bearing
Export Director, YIDI Motion
15+ years in linear motion exports to USA
HEBEI YIDI IMPORT AND EXPORT TRADING CO.,LTD.
16-1-1601 Aobeigongyuan, Chang'an District, Shijiazhuang City, Hebei Province, China
Contact Us
Frequently Asked Questions
Yes, pre-set for zero endplay. Minimum 10 pairs.
12 months or 5,000 hours, whichever first. Covers material defects.
Full ODM—your logo, packaging. Tooling fee waived over 1,000pcs.
Free for qualified buyers, shipping on you.
