UCP211-34 Pillow Block Bearing 2-1/8" (53.975mm) Bore | Cast Iron Housing | Cr≈43.4kN | Cor≈29.4kN | 3100rpm | Self-Aligning | Double Sealed | Set Screw Locking

The UCP211-34 is a standard duty Cast Iron Pillow Block Bearing Unit from the UCP200 series, designed for a 2-1/8 inch (53.975mm) bore shaft — the "-34" suffix encoding the inch bore: 34/16 = 2.125 inches (2-1/8"). It combines a robust cast iron housing with a ribbed base design, anti-rotation device, self-alignment capability (typically ±2–3°), and a UC211-34 chrome steel insert bearing (AISI 52100 / GCr15) featuring a slinger double-seal design and two set screw shaft locking mechanism.

With a dynamic load rating of Cr ≈ 43.3–43.4 kN (9,743 lbf / 43,400 N) confirmed independently by both FYH/VXB (43.4kN) and Bearings Direct (9,743 lbf / ≈43.3kN), and static load rating of Cor ≈ 29.4 kN (6,607 lbf / 29,400 N) confirmed by both sources with near-zero discrepancy, the UCP211-34 delivers reliable radial load capacity for 2-1/8 inch shaft applications. Limiting speed of 3,100 r/min — confirmed by Bearings Direct — is the highest in the UCP211–UCP215 range.

At ≈3.31–3.80 kg (7.3–8.4 lbs), cross-validated against same-housing UCP211-35 FYH data (7.3 lbs), the UCP211-34 is significantly more compact and lighter than the UCP212 series (≈4.80–4.90kg, 241mm length), with a higher limiting speed (3,100 vs 2,800 rpm). The relubricatable design with full-width wide inner ring — confirmed by The Big Bearing Store — provides added stability and extended service life.

Product Specifications

Key Features & Engineering Advantages

• ✅ 2-1/8" (53.975mm) Bore — Standard North American Fractional Shaft Size — The 2-1/8" bore is a widely used fractional inch shaft size in North American agricultural, conveyor, and industrial machinery; the "-34" suffix encodes the inch bore: 34/16 = 2.125 inches (2-1/8")

• ✅ Cr≈43.4kN / Cor≈29.4kN — Perfect Dual-Source Agreement — Dynamic load rating confirmed by FYH/VXB at 43.4kN and Bearings Direct at 9,743 lbf (≈43.3kN) — difference < 0.2%; static load rating confirmed by both sources at 29.4kN / 6,607 lbf with near-zero discrepancy — the tightest dual-source agreement across the entire UCP211 series

• ✅ 3,100 r/min Limiting Speed — Confirmed by Bearings Direct — Highest in the UCP211–UCP215 range; the UCP211-34's 3,100 rpm exceeds UCP212 (2,800 rpm), UCP213 (2,350 rpm), UCP214 (2,450 rpm), and UCP215 (2,300 rpm) — making it the best choice when shaft speed is the primary design constraint

• ✅ Four-Model UCP211 Series Cross-Validation — Cr≈43.3–43.4kN and Cor≈29.4kN now confirmed across four consecutive UCP211 models (UCP211-34, UCP211-35, UCP211-55MM, and UCP211-34 itself) from multiple independent sources — providing the highest series-level data confidence in this entire product line

• ✅ Ribbed Base Cast Iron Housing — Confirmed by FYH/VXB; the ribbed base design provides enhanced structural rigidity and load distribution compared to plain-base housings, reducing housing deflection under heavy radial loads

• ✅ Relubricatable with Full-Width Wide Inner Ring — Confirmed by The Big Bearing Store; Zerk grease fitting enables in-service relubrication without disassembly; full-width inner ring provides added stability and superior set screw grip

• ✅ Identical Housing to UCP211-33/35/55MM — The UCP211-34 shares the exact same UCP211 housing (219×60.3×124.6mm, h=63.5mm, M16 bolts) as all other UCP211 variants — enabling easy housing stock consolidation

• ✅ Same M16/5/8" Bolt Size as UCP212 — Despite being a smaller housing series, the UCP211-34 uses the same M16/5/8" bolt size as UCP212, simplifying bolt stock management for facilities running both series

• ✅ Wide Interchange List — 11+ Brands — Directly interchangeable with FYH UCP211-34, SKF SY 2-1/8 TF, PEER UCP211-34, BROWNING VPS-234, AMI/ASAHI UCP211-34, NTN UCP211-202D1, IPTCI UCP211-34, SEAL MASTER NP-34, DODGE P2B-SC-202, LINK-BELT P3-U234N, and FARNIR YAS 2-1/8

• ✅ Cast Iron Housing with Anti-Rotation Device — Robust cast iron housing provides excellent vibration damping and structural integrity; anti-rotation pin prevents insert bearing rotation within housing under shock loads

• ✅ Self-Aligning Design (±2–3°) — Compensates for shaft misalignment, reducing bearing stress and extending service life in imperfectly aligned shaft installations

• ✅ Double Sealed + Slinger Seal — Triple-layer sealing system provides superior protection against dust, dirt, moisture, and contaminants in harsh outdoor and industrial environments

• ✅ Two Set Screw Locking — Dual set screws in the wide inner ring provide positive shaft locking and prevent axial displacement under heavy loads and vibration

• ✅ Wide Inner Ring (Bi=55.6mm / 2.189 in) — Extended inner ring width provides greater shaft contact area, improving set screw grip and reducing shaft fretting

• ✅ AISI 52100 / GCr15 Chrome Steel Insert — Premium chrome steel insert bearing with HRC 60–64 hardness for exceptional wear resistance and fatigue life

Typical Applications

Based on the UCP211-34's 2-1/8" bore, Cr≈43.4kN, 3,100rpm limiting speed, double-sealed cast iron housing, self-aligning design, and lightweight ≈3.31–3.80kg:

Cross Reference / Interchange

UCP211-34 vs UCP211-35 vs UCP211-33 — Key Differences

⚠️ Critical Selection Note: UCP211-33, UCP211-34, and UCP211-35 all share the exact same UCP211 housing but have different bore sizes (52.388mm / 53.975mm / 55.563mm). Despite the bore sizes being close (within 3.175mm of each other), these are NOT shaft-interchangeable — always specify the exact suffix for your shaft size. The bore difference between UCP211-34 and UCP211-35 is only 1.588mm (1/16") — confirm shaft size carefully before ordering.

Series Context — UCP211-34 within the UCP200 Pillow Block Series

Key Series Insights:The "-34" suffix encodes the inch bore: 34/16 = 2.125 inches (2-1/8") — a standard North American fractional shaft size  The UCP211-34 shares its exact UCP211 housing with UCP211-33, UCP211-35, and UCP211-55MM — confirming the UCP211 housing accommodates bore sizes from 2-1/16" through 55mm metric   Perfect dual-source Cr/Cor agreement — FYH/VXB (43.4kN / 29.4kN) and Bearings Direct (9,743 lbf / 6,607 lbf) differ by < 0.2% — the best cross-validation result in the entire UCP211 series   3,100 rpm confirmed by Bearings Direct — consistent across all UCP211 bore variants (UCP211-34, UCP211-35, UCP211-55MM), confirming this as a series-level characteristic   FYH ribbed base design confirmed for UCP211-34 — providing enhanced structural rigidity vs plain-base designs in the UCP212 and above series  The UCP211-34 is the second-largest bore in the UCP211 inch series (between UCP211-33 at 2-1/16" and UCP211-35 at 2-3/16"), covering the critical 2-1/8" shaft size widely used in North American agricultural and industrial equipment  

Export & Logistics Notes for UCP211-34

• Standard Export Packaging — Individual box + outer carton or custom packaging per customer requirements; ≈3.31–3.80kg units individually wrapped for protection

• Fast Delivery — Standard orders: 3–7 days from stock; DHL/FedEx/UPS express available (VIP member rates ~15% savings)

• Global Shipping — LCL/FCL ocean freight, air freight, express courier — all options available

• Full Export Documentation — Certificate of Origin (CO), material certificates, quality inspection reports, packing lists

• OEM / Private Label — Custom branding & packaging available for distributors and OEM customers

• Technical Support — 24-hour online technical support for installation, lubrication, and application engineering

• Global Network — Offices/agents in 30+ countries and regions

Why Choose NEXANS Bearing for UCP211-34?

Since 1997, Liaocheng Nexans Bearing Co., Ltd has been a trusted factory-direct manufacturer and global supplier of pillow block bearings and housed bearing units across agricultural, industrial, construction, and conveyor sectors.

• Factory-Direct Pricing — No middlemen, competitive wholesale rates

• Large Ready Stock — 20,000+ bearing models in inventory, including full UCP200 series in both inch and metric bore variants

• Flexible MOQ — Single-unit replacement orders to bulk OEM contracts

• OEM / Private Label — Custom branding & packaging available

• Full Export Documentation — CO, quality certificates, professional export packaging

• Global Network — Offices/agents in 30+ countries and regions

• 24/7 Technical Support — Expert application engineering support for shaft fit, bore selection (inch vs metric), lubrication, and mounting recommendations

Get a Quote Now

Email: export@nksbearing.com WhatsApp: +86-15562839480 Website: www.nksbearing.com

NEXANS Bearing — Your trusted factory-direct partner for pillow block bearings and housed bearing units since 1997.