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Oct . 28, 2025 13:35 Back to list

Cylindrical Roller Bearing | High Load & Low Friction

Long Cylindrical Roller Bearings: insider notes, specs, and real-world tips

If you’re weighing a Cylindrical Roller Bearing for tight radial envelopes, you’re not alone. In heavy-duty gearboxes and compact drive modules, engineers keep telling me the same thing: capacity matters, but so does footprint. Long-roller designs blur the line with needle bearings—compact, high stiffness, and surprisingly tolerant of shock loads. To be honest, that balance is why they keep showing up in new platform drawings.

Cylindrical Roller Bearing | High Load & Low Friction

What’s trending (and why it matters)

Three shifts I’m seeing in the market: (1) longer rollers with optimized crowning to reduce edge stress, (2) cleaner steel + tighter heat-treatment control for fatigue life, and (3) modular cages for different speeds. Many customers say they’re moving from ball to Cylindrical Roller Bearing solutions in e-axles because stiffness translates directly into NVH wins.

Product snapshot

Product: Long Cylindrical Roller Bearings (origin: XIHUAN ROAD HEXI TOWN, LINXI COUNTY, HEBEI PROVINCE, CHINA). While the company also notes needle-roller heritage, the long cylindrical rollers carry that same compact DNA—useful where radial space is limited.

Parameter Typical Range (≈, real-world use may vary)
Bore (d) 20–120 mm
Outer Diameter (D) 35–180 mm
Width (B) 12–60 mm
Cage Options Steel, brass, polyamide (speed-focused)
Accuracy Classes ISO 492 P0, P6, P5
Dynamic Load Rating Up to ≈ 250 kN (size-dependent)
Limiting Speed ≈ 2,000–9,000 rpm (cage + lubrication)

Process flow (how it’s really made)

  • Materials: high-carbon chromium steel (GCr15/100Cr6); optional case-hardened variants.
  • Methods: precision turning, grinding, superfinishing; roller crowning; controlled heat treatment.
  • Testing standards: ISO 76 (static), ISO 281 (life/L10), ISO 492 (tolerances), ISO 15243 (failure modes).
  • Inspection: roundness ≤ 2–4 μm typical; radial runout ≤ 5–8 μm on P6.
  • Service life: L10h estimated per ISO 281; field results often exceed calc by 10–20% with clean oil.

Where they’re used

Gearboxes, machine tool spindles (support positions), e-axles, pumps, mining idlers, steel mill stands. In compact housings, a Cylindrical Roller Bearing often replaces duplex ball sets to bump up radial stiffness.

Advantages I’ve seen in the field

  • High load density in limited radial space (yes, that’s the headline).
  • Better shock resistance vs. balls; robust under misalignment if crowning is right.
  • Flexible cages: polyamide for speed, brass for hot, steel for rugged duty.

Vendor snapshot (quick compare)

Vendor Strengths Lead Time (≈) Certifications
ARY Bearing (Hebei) Custom long-roller sets, flexible MOQs, responsive engineering 2–5 weeks ISO 9001; IATF 16949 on request
Global Tier‑1 Brand Broad catalog, global logistics, extensive testing Stock–6 weeks ISO 9001, IATF 16949
Regional Supplier Cost-effective, local support 3–8 weeks ISO 9001 (typical)

Customization and test data

Options include special roller length-to-diameter ratios, cage material swaps, matched sets, and phosphate or black-oxide finishes for corrosion resistance. Recent bench tests I saw reported vibration velocity ≤ 1.8 mm/s (rms) after run-in and grease life extensions of around 12% using PAO/di-urea grease at 120°C. Your mileage will vary with sealing and load spectrum.

Two quick case notes

  • Steel mill gearbox: swapping to long-roller Cylindrical Roller Bearing boosted radial stiffness ≈18%, cutting gear mesh sidebands in the vibration plot.
  • Compact compressor: polyamide cage variant raised limiting speed by ≈15% with the same housing—no redesign drama.

Feedback snippet: It seems that maintenance crews appreciate the predictable wear pattern; fewer surprise spalls when oil cleanliness stays in ISO 17/15/12 or better.

Standards, paperwork, and the boring-but-critical stuff

Traceable heat lots, PPAP level 3 (when automotive), material certs to ASTM/AISI equivalents, and test reports referencing ISO 76/281/492. Sounds dry, but it saves programs.

Authoritative citations

  1. ISO 281: Rolling bearings — Dynamic load ratings and rating life.
  2. ISO 76: Rolling bearings — Static load ratings.
  3. ISO 492: Rolling bearings — Radial bearings — Tolerances.
  4. ISO 15243: Rolling bearings — Damage and failures — Terms, characteristics and causes.
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