UCP204-20MM Pillow Block Bearing | 20mm Bore | Cast Iron Housing | UC204-20MM Insert | Cr≈12.8 kN (2,882 lbf) / Cor≈6.65 kN (1,495 lbf) | Self-Aligning | Two Set Screws | Slinger Seal | Grease Fitting

The UCP204-20MM is a two-bolt pillow block bearing unit from the UCP200 series, combining a cast iron pillow block housing with a UC204 chrome steel insert bearing. Designed for standard-duty industrial applications, the UCP204-20MM accepts a 20mm metric shaft diameter and provides a reliable, economical housed bearing solution across a wide range of industries.

The unit features:

• Cast iron housing with anti-rotation device and standard base-to-center height

• UC204 insert bearing — self-aligning, wide inner ring, AISI 52100 / GCr15 chrome steel, slinger seal

• Two set screws positioned in the inner ring for positive shaft locking

• Standard grease fitting for convenient in-service re-lubrication

• Compact and lightweight — unit weight ~1.25 lb (~0.57 kg), smaller housing footprint than UCP205 series

Product Specifications

Cross Reference / Interchange

Note: UCP204-20MM uses a 20mm metric bore — note that the SKF cross-reference SY 3/4 TF is a fractional inch (3/4" = 19.05mm) unit listed as the closest equivalent; always verify exact bore size before substituting. The UCP204-20MM is distinct from the fractional inch UCP204-12 (3/4" = 19.05mm) — both share the same housing but differ in bore by ~0.95mm.

UCP204-20MM vs Adjacent Models — Key Comparison

UCP204-20MM vs UCP205-20MM: Both accept a 20mm shaft but use different housing sizes. The UCP205-20MM has a larger, heavier housing (a=140mm, e=105mm, h=36.5mm, Cr≈14.0 kN). Choose UCP204-20MM for lighter loads and tighter space; choose UCP205-20MM for heavier radial loads.

Key Features & Engineering Advantages

• ✅ Cr≈12.8 kN (2,882 lbf) / Cor≈6.65 kN (1,495 lbf) — Multi-Source Confirmed — Load ratings independently verified by BearingsDirect and SummitCollars

• ✅ Max Speed 7,450 RPM — Highest in UCP204 Series — Significantly higher limiting speed than UCP205 (6,250 RPM) and UCP206 (5,300 RPM) series; ideal for high-speed light-duty fan, blower, and pump applications

• ✅ 20mm Metric Bore — Global Standard Size — Widely used in metric machinery worldwide; direct drop-in replacement for 10+ major brands

• ✅ Compact UCP204 Housing — Smaller footprint (a=127mm, e=95.3mm, h=33.3mm) vs UCP205 series; ideal for space-constrained installations

• ✅ Self-Aligning Design — Accommodates shaft misalignment up to ±2°, reducing installation stress and extending service life

• ✅ Cast Iron Housing with Anti-Rotation Device — Prevents insert bearing from rotating within the housing under shock loads or vibration

• ✅ Two Set Screw Locking — Dual set screws in the wide inner ring provide positive, reliable shaft attachment without requiring keyways

• ✅ Slinger Seal + Steel Slinger + Lip Seal — Multi-layer contamination exclusion for dusty, wet, or moderately contaminated environments

• ✅ AISI 52100 / GCr15 Chrome Steel Insert — Industry-standard bearing steel for maximum fatigue life and consistent hardness

• ✅ Standard Grease Fitting — Enables in-service re-lubrication for extended maintenance intervals without disassembly

• ✅ Wide Interchange Compatibility — Compatible with SKF, Dodge, Browning, Link-Belt, NTN, AMI, Fafnir, Seal Master, IPTCI, PEER — 10+ brands confirmed

• ✅ Lightweight at ~1.25 lb (~0.57 kg) — Compact and light, ideal for weight-sensitive installations

• ✅ 3,000m² Warehouse — Large Ready Stock — Fast delivery for urgent maintenance and production line requirements

Typical Applications

FAQ

Q1: What is the difference between UCP204-20MM and UCP204-12 (3/4")?

Both use the same UCP204 cast iron housing with identical external dimensions (h=33.3mm, a=127mm, e=95.3mm). The difference is bore: UCP204-20MM = 20mm (0.787"), UCP204-12 = 3/4" (19.05mm). Although close, they are NOT interchangeable — the 20mm bore is ~0.95mm larger than 3/4". Always measure your shaft diameter precisely.

Q2: Why does SKF list SY 3/4 TF as the cross-reference for UCP204-20MM?

The SKF SY 3/4 TF is the closest SKF equivalent in the UCP204 housing size, but note it has a 3/4" (19.05mm) bore vs the 20mm bore of UCP204-20MM. This is a common cross-reference listing practice — always verify exact bore before substituting. For a true 20mm bore SKF equivalent, verify with SKF's current catalog.

Q3: What is the Dodge equivalent for UCP204-20MM?

The Dodge equivalent is P2B-SC-20M (Part #125851) — a direct cross-reference with 20mm bore and matching housing dimensions.

Q4: How does UCP204-20MM compare to UCP205-20MM?

Both accept a 20mm shaft but use different housings. UCP204-20MM: smaller housing (a=127mm, e=95.3mm, h=33.3mm), Cr≈12.8 kN, max 7,450 RPM, weight ~0.57 kg. UCP205-20MM: larger housing (a=140mm, e=105mm, h=36.5mm), Cr≈14.0 kN, max ~6,250 RPM, weight ~0.80 kg. Choose UCP204-20MM for higher speed / lighter load; choose UCP205-20MM for heavier radial loads.

Q5: Can the UC204 insert be replaced separately?

✅ Yes. The UC204-20MM insert bearing can be replaced independently without replacing the cast iron housing, significantly reducing maintenance costs. NEXANS Bearing supplies both complete UCP204-20MM units and UC204-20MM insert bearings separately.

Q6: Is OEM/private label available?

✅ Yes. NEXANS Bearing provides full OEM and private label services — custom branding, packaging, and documentation. Flexible MOQ for distributors and maintenance contractors.

Get a Quote Now

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

NEXANS Bearing — Factory-direct partner for pillow block bearings and industrial bearing solutions since 1997.