Pillow Block Bearing Units

16 series · Setscrew, eccentric collar, concentric collar & adapter sleeve locking · Standard, medium & heavy duty · Tapped base & pedestal variants · Shaft bore 12–140 mm

4
Locking Styles
12 mm
Min. Bore
140 mm
Max. Bore
Bearings › Pillow Block Bearing Units
Select by: 🔧 Setscrew 🔄 Eccentric Collar ⇄ Concentric Collar 🔒 Adapter Sleeve ⚙ Heavy Duty ▴ Tapped Base

Standard Duty — Setscrew Locking

The most widely used pillow block configuration. UC series wide inner ring insert with dual 120° setscrew locking. Suitable for bidirectional drives at standard operating speeds. Insert bearings are interchangeable across all UC200-series housings (UCP200, UCF200, UCFL200, UCT200) — one insert type across all standard-duty positions on the same machine.

UCP200 series pillow block bearing unit standard duty setscrew locking cast iron
Setscrew

UCP200 Series

Standard Duty Pillow Block

d 12–90 mm · 19 sizes

UC series wide inner ring insert · Dual setscrew · Metric and inch bore · End caps available

UCPX00 series pillow block bearing unit medium duty setscrew locking cast iron
Setscrew — Medium Duty

UCPX00 Series

Medium Duty Pillow Block

d 25–85 mm · 13 sizes

Heavier housing cross-section · Higher-rated UCX insert · For elevated belt tension applications

UCP300 series heavy duty pillow block bearing unit setscrew locking cast iron
Setscrew — Heavy Duty

UCP300 Series

Heavy Duty Pillow Block

d 25–140 mm · 21 sizes

Maximum radial load capacity · UC300 insert · Metric bore only · Up to 90 kg per unit

Eccentric Collar Locking

Self-tightening collar that grips progressively under unidirectional shaft rotation — more secure than setscrew under sustained belt load and frame vibration. Suitable for single-direction drives only. Housing dimensions match UCP200 equivalents for direct insert-only upgrade.

NAP200 series pillow block bearing unit eccentric locking collar cast iron standard duty
Eccentric Collar

NAP200 Series

Standard Duty — Eccentric Collar

d 12–75 mm · 15 sizes

NA series eccentric collar · Self-tightening under rotation · NAP201S–203S slim variant

Concentric Collar Locking

360° uniform shaft contact with no eccentric mass — fully bidirectional and suitable for high-speed drives where setscrew retention is marginal. Collar releases symmetrically in both directions. Correct choice for reversing drives, servo-controlled shafts, and high-speed fan applications.

UEP200 series pillow block bearing unit concentric locking collar high speed bidirectional cast iron
Concentric Collar

UEP200 Series

Standard Duty — Concentric Collar

d 20–60 mm · 9 sizes

UE series concentric collar · 360° bidirectional · No imbalance mass · High-speed and reversing drives

Adapter Sleeve Locking

1:12 tapered bore with H-series adapter sleeve — no shaft surface damage on installation or removal. Sleeve distributes clamping load over full contact length. Suitable for rough-turned, as-machined, and reused shafts. Multiple HS/HA/HE sleeve variants cover a range of shaft diameters within the same housing.

UKP200+H series pillow block bearing unit tapered bore adapter sleeve locking cast iron
Adapter Sleeve

UKP200+H Series

Standard Duty — Adapter Sleeve

d 20–80 mm · 13 sizes

Tapered bore + H-series sleeve · No shaft damage · HS/HA/HE variants · Self-locking 1:12 taper

Specialised Standard Duty Variants

Purpose-engineered housings that address specific installation constraints not met by the standard UCP200. All use UC200-series insert bearings and maintain insert interchangeability with the standard series.

UCPE200 series pillow block bearing unit extended base setscrew locking cast iron
Extended Base

UCPE200 Series

Extended Base Pillow Block

d 12–60 mm · 10 sizes

Wider base plate for larger bolt-hole spacing · Same UC insert · Higher mounting surface stability

UCAK200 series pillow block bearing unit narrow base setscrew locking cast iron
Narrow Base

UCAK200 Series

Narrow Base Pillow Block

d 12–55 mm · 9 sizes

Reduced base width for confined mounting spaces · UC insert · Setscrew locking

SALP200 SBLP200 series light duty pillow block bearing unit eccentric setscrew locking compact
Light Duty

SALP200 & SBLP200 Series

Light Duty Compact Pillow Block

d 12–40 mm · 8 sizes

Compact lightweight housing · SBLP=setscrew / SALP=eccentric collar · SB/SA insert

UCSB200 series pillow block bearing unit solid base setscrew locking cast iron
Solid Base

UCSB200 Series

Solid Base Pillow Block

d 12–60 mm · 10 sizes

Solid (non-hollow) base for highest bolt reaction loads · UC insert · Setscrew locking

Tapped Base Pillow Blocks

Machine-tapped bolt holes in the base plate replace the standard through-clearance holes. The stud or cap screw engages from above into the housing base, eliminating the nut on the underside of the mounting plate — essential when the back of the mounting surface is inaccessible. All tapped base variants use UC200-series inserts with setscrew locking.

UCPA200 series tapped base pillow block bearing unit setscrew locking cast iron standard
Tapped Base

UCPA200 Series

Standard Tapped Base

d 12–55 mm · 9 sizes

Machine-tapped base holes · Stud or cap screw from above · UC insert · Setscrew locking

UEPA200 series tapped base pillow block bearing unit concentric collar locking cast iron
Tapped Base — Concentric

UEPA200 Series

Tapped Base — Concentric Collar

d 20–55 mm · 7 sizes

Tapped base + concentric collar locking · Bidirectional · High-speed tapped base positions

UCPW200 series tapped base wide pillow block bearing unit setscrew locking cast iron
Tapped Base — Wide

UCPW200 Series

Wide Tapped Base

d 12–55 mm · 9 sizes

Wider tapped base plate for larger bolt-hole spacing · UC insert · Setscrew locking

UCPG200 series tapped base pillow block bearing unit grub screw locking cast iron
Tapped Base — Grub

UCPG200 Series

Grub Screw Tapped Base

d 12–55 mm · 9 sizes

Tapped base with grub screw (cup-point setscrew) locking · Compact shaft bite · UC insert

UCTB200 series tapped base pillow block bearing unit setscrew locking cast iron wide base
Tapped Base — TB

UCTB200 Series

TB-Type Tapped Base

d 12–55 mm · 9 sizes

TB-type tapped base configuration · Different base bolt pattern from UCPA/UCPW · UC insert

Pedestal Base Pillow Block

Raised pedestal base positions the shaft centreline significantly higher above the mounting surface than a standard pillow block. Used where the driven component must clear an obstruction between the shaft and the mounting plate, or where the machine frame requires a specific shaft height that a standard pillow block cannot achieve.

UCPH200 series pedestal base pillow block bearing unit high shaft height setscrew locking cast iron
Pedestal Base

UCPH200 Series

Pedestal Base Pillow Block

d 12–55 mm · 9 sizes

Raised pedestal base · High shaft centreline above mounting surface · UC insert · Setscrew locking

Series Selection Matrix

Use the table below to identify the correct series by duty rating and locking mechanism. Click the series name to view the full specification table.

Series Duty Locking Bore Range Key Differentiator
UCP200StandardSetscrew12–90 mmMost widely used; metric & inch bore; insert interchangeable with UCF200, UCFL200, UCT200
NAP200StandardEccentric collar12–75 mmSelf-tightening under unidirectional rotation; more secure than setscrew under vibration
UEP200StandardConcentric collar20–60 mm360° bidirectional; no imbalance mass; for high-speed and reversing drives
UKP200+HStandardAdapter sleeve20–80 mmNo shaft surface damage; suitable for rough-turned shafts; HS/HA/HE sleeve variants
UCPX00MediumSetscrew25–85 mmHeavier housing; higher-rated UCX insert; when UCP200 L10 life is insufficient
UCP300HeavySetscrew25–140 mmMaximum radial load; UC300 insert; metric bore only; up to 83.2 kg
UCPE200StandardSetscrew12–60 mmWider base plate; increased bolt-hole spacing for larger mounting surfaces
UCAK200StandardSetscrew12–55 mmNarrow base width for confined mounting spaces
SALP200 / SBLP200LightEccentric / Setscrew12–40 mmCompact lightweight housing; smaller footprint than UCP200 equivalent bore
UCSB200StandardSetscrew12–60 mmSolid (non-hollow) base for highest bolt-reaction-load installations
UCPA200StandardSetscrew12–55 mmTapped base; stud or cap screw from above; inaccessible underside applications
UEPA200StandardConcentric collar20–55 mmTapped base + concentric collar; bidirectional tapped base with no imbalance
UCPW200StandardSetscrew12–55 mmWide tapped base; larger bolt-hole spacing; stud from above
UCPG200StandardGrub screw12–55 mmTapped base + grub screw (cup-point setscrew); compact shaft engagement
UCTB200StandardSetscrew12–55 mmTB-type tapped base pattern; different bolt spacing from UCPA/UCPW
UCPH200StandardSetscrew12–55 mmPedestal base; high shaft centreline; for frame clearance requirements

Frequently Asked Questions

▶ What is the difference between UCP200, UCPX00, and UCP300?

UCP200 is standard duty — the most widely used pillow block for general industrial, agricultural, and conveyor applications. UCPX00 is medium duty with a heavier housing cross-section and higher-rated UCX insert for applications where L10 calculations show UCP200 life is insufficient under the actual belt tension and speed. UCP300 is heavy duty with the UC300 series insert (significantly higher C and C0 ratings) and a heavier structural frame for mining, cement, and bulk handling applications. UCP300 is metric bore only; UCP200 and UCPX00 have both metric and inch bore options.

▶ Which locking style should I choose — setscrew, eccentric collar, or concentric collar?

Setscrew (UCP200, UCPX00, UCP300): suitable for bidirectional drives at standard speeds. Simplest installation and widest bore range. Eccentric collar (NAP200): for unidirectional drives only — the collar self-tightens under rotation, providing better retention than setscrew under sustained vibration. Do not use on reversing drives. Concentric collar (UEP200): for high-speed or reversing drives — 360° uniform contact, no imbalance mass, releases symmetrically in both directions. Correct choice where shaft speed or direction change makes setscrew or eccentric collar locking inadequate.

▶ When should I specify the UKP200+H adapter sleeve instead of setscrew?

Choose UKP200+H when the shaft is rough-turned (not ground), when the shaft will be reused between bearing replacements, or when repeated setscrew tightening at the same position has caused fretting damage. The adapter sleeve distributes clamping load over its full contact length, leaves no marks on removal, and requires no precise shaft diameter tolerance — HS, HA, and HE sleeve variants cover a range of shaft diameters within the same housing size.

▶ What does the tapped base variant mean, and when is it necessary?

Standard pillow blocks (UCP200) have clearance holes in the base through which bolts pass, with nuts tightened from below the mounting plate. Tapped base variants (UCPA200, UEPA200, UCPW200, UCPG200, UCTB200) have machine-tapped holes in the base that accept studs or cap screws tightened from above — eliminating the underside nut. This is essential when the back of the mounting plate is enclosed or inaccessible, such as inside a sealed machine frame, on a closed-section beam, or where the mounting surface is against a wall.

▶ Can I use the same insert bearing across UCP200, UCF200, UCFL200, and UCT200?

Yes. The UC series wide inner ring insert bearing is identical for equivalent bore sizes across all four housing formats: UCP200 (pillow block), UCF200 (4-bolt square flange), UCFL200 (2-bolt oval flange), and UCT200 (take-up unit). This means one insert type covers all standard-duty mounted bearing positions on the same machine, simplifying spare parts inventory and making in-service housing format changes possible without sourcing new insert bearings.

▶ Are end caps available for UCP200 pillow blocks?

Yes. Pressed steel end caps are available on request: SM (closed, fitted at one end) and S (open, fitted at one end). Order example: UCP205+SM. End caps reduce contamination ingress at the shaft end of the housing. A machined cap groove (suffix M) is also available on request for housings where the standard cap groove depth is not sufficient.

Ready to Order?

Provide shaft diameter, bore type (metric or inch), locking preference, duty rating, and quantity. New-client samples available at sample pricing. Multi-model orders from USD 1,500 accepted. Engineering drawings required before order confirmation — catalogue dimensions for reference only.