Full Complement Cylindrical Roller Bearings
Designed without a cage to fit more rollers in the same bearing envelope, full complement cylindrical roller bearings provide higher radial load capacity for low-speed, heavy-duty and shock-load applications.
More Rollers, Higher Radial Load
No-cage structure for compact bearing positions where load capacity is more critical than high-speed operation.
Bearing Type
Full Complement
No cage cylindrical roller bearing
Main Series
NCF / NNCF / NNF
NJG and SL equivalent designs available
Load Capacity
High Radial Load
More rollers in the same envelope
Working Condition
Low-Speed Duty
For heavy and shock-load applications
Main Designs and SL Equivalent Series
Full complement cylindrical roller bearings are selected by row arrangement, rib design, axial location and sealing requirement. NCF, NJG, NNCF and NNF represent common structural designs, while SL designations are widely used as equivalent or interchange series in the market.
NCF Series
- Location: One-direction axial location
- Feature: Full roller set with retaining ring arrangement
- Use: High radial load positions with limited axial guidance
NJG Series
- Location: One-direction axial location
- Feature: NJ-type rib arrangement with full roller set
- Use: Shock-load and low-speed heavy-duty positions
NNCF Series
- Location: High radial stiffness support
- Feature: Double-row full roller arrangement
- Use: Compact heavy-load bearing positions
NNF Series
- Location: Structure-dependent axial location
- Feature: Integral sealing option and grease retention
- Use: Sheaves, pulleys, guide rollers and contaminated areas
SL designations are widely used as equivalent or interchange series for full complement cylindrical roller bearings. Depending on the number group, SL bearings may correspond to single-row, double-row or sealed full complement designs, such as SL18, SL19, SL01, SL02, SL04 and SL0450 series.
For replacement, confirm the internal design, ring arrangement, sealing type and boundary dimensions instead of relying on the SL prefix alone.
Full Complement vs Caged Cylindrical Roller Bearings
Full complement designs increase the number of rollers for higher radial load capacity. Caged designs provide better roller guidance and are preferred where speed is the main factor.
Selection Focus
| Factor | Full Complement CRB | Caged CRB |
|---|---|---|
| Roller count | Maximum roller quantity, no cage space | Fewer rollers due to cage pockets |
| Radial load | Higher radial load capacity | Medium to high radial capacity |
| Speed | Lower speed limit | Better for medium and high speed |
| Lubrication | Requires stable oil film or frequent grease supply | More tolerant under normal lubrication |
| Heat control | More sensitive to friction and lubricant starvation | Better roller guidance and heat behavior |
| Typical use | Low-speed, heavy radial load, shock load | Higher speed, continuous running, guided rotation |
Selection Flow for Full Complement Bearings
Confirm load, speed and lubrication before choosing a full complement cylindrical roller bearing. The design is mainly used where radial capacity has priority over speed.
Load
High radial load or shock load position.
Speed
Low to medium speed. Check limit speed first.
Lubrication
Oil bath, oil circulation or reliable grease supply.
Location
Match axial guidance with NCF, NJG, NNCF or NNF.
Clearance
Confirm normal, C3 or special clearance.
Fit
Check shaft fit, housing fit and temperature rise.
Required Checks Before Replacement
For SL or equivalent replacement, confirm the internal design instead of relying on the bearing prefix only.
| Check Item | Recommended Confirmation | Risk if Ignored |
|---|---|---|
| Speed | Compare working speed with catalog limit speed | Heat rise |
| Lubrication | Confirm oil bath, oil circulation or grease interval | Roller wear |
| Clearance | Select clearance after checking fit and temperature | Preload or vibration |
| Axial location | Check locating direction and rib arrangement | Axial movement error |
| Seal type | Confirm open, sealed or grease-filled design | Contamination or leakage |
| SL interchange | Check dimensions, seals and internal design | Wrong replacement |
Typical Bearing Positions for Full Complement CRB
Full complement cylindrical roller bearings are mainly used in low-speed, high-radial-load positions where a caged design may not provide enough load capacity.
Sheaves & Pulleys
Seal type, grease retention and relubrication interval.
Gearboxes & Reducers
Internal clearance, shaft fit and oil supply condition.
Rolling Mill Auxiliary
Fit tolerance, load direction and heat rise during operation.
Mining Equipment
Sealing arrangement, grease interval and contamination level.
Information Required for Full Complement Bearing Inquiry
Provide the bearing designation, dimensions and working condition to confirm the correct full complement cylindrical roller bearing or SL equivalent series.
Required Inquiry Data
Send these items when requesting a quotation or replacement check.
Bearing Model
NCF, NJG, NNCF, NNF, SL18, SL04 or old part number.
Boundary Dimensions
Bore, outside diameter and width. Drawing is preferred.
Load & Speed
Radial load, shock load, working speed and duty cycle.
Lubrication
Oil bath, oil circulation, grease type or grease interval.
Clearance & Fit
Normal, C3, special clearance, shaft fit and housing fit.
Quantity & Lead Time
Order quantity, annual demand and required delivery date.
Model Check Example
Use model code and working data together. Do not rely on prefix only.
- SL04 sealed full complement design
- 50 dimension series / size group
- PP seals on both sides
- C3 greater radial internal clearance
- Check dimensions, seals, load and speed
Manufacturing & Quality Control for Full Complement CRB
Full complement cylindrical roller bearings require stable raceway geometry, roller matching and internal clearance control to support heavy radial loads under low-speed operation.
Raceway Grinding
Control roundness, profile accuracy and raceway surface finish.
Roller Matching
Reduce roller diameter variation and improve load distribution.
Clearance Control
Check radial internal clearance according to fit, speed and temperature.
Final Inspection
Confirm dimensions, rotation condition, marking and packing before shipment.
Inspection Items Before Shipment
Full Complement Cylindrical Roller Bearings FAQ
Common questions for full complement CRB selection, SL series replacement, purchasing confirmation and heavy-duty bearing applications.
What is a full complement cylindrical roller bearing?
A full complement cylindrical roller bearing uses more rollers than a caged design. This increases radial load capacity and makes it suitable for low-speed, heavy-load positions. It is commonly selected where installation space is limited and higher load capacity is required.
What is the difference between full complement and caged cylindrical roller bearings?
The main difference is load capacity and speed performance. A full complement CRB carries more radial load because it contains more rollers. A caged cylindrical roller bearing is usually better for higher speed, lower friction and stricter heat control.
- Full complement: higher radial load, lower speed range.
- Caged design: higher speed capability, better roller guidance.
Are SL series cylindrical roller bearings interchangeable with NCF, NJG, NNCF or NNF bearings?
Some SL series cylindrical roller bearings correspond to NCF, NJG, NNCF or NNF designs, but interchange cannot be confirmed by prefix only. Before purchase, check dimensions, internal design, seal type, radial internal clearance and application speed.
What information is required to request a quotation?
For faster quotation, provide the bearing model or old part number, boundary dimensions, clearance, load, speed, lubrication method, application position, quantity and required delivery time. A drawing or bearing photo is recommended for replacement projects.
- Bore diameter, outside diameter and width
- NCF, NJG, NNCF, NNF or SL equivalent code
- Radial load, speed, shock load and lubrication
- Quantity, lead time and inspection request
Can full complement cylindrical roller bearings run at high speed?
Full complement cylindrical roller bearings are mainly used for heavy radial load and low to medium speed. If the bearing position requires high speed, continuous rotation or strict heat control, compare with a caged cylindrical roller bearing before final selection.
When should C3 or special radial internal clearance be selected?
C3 or special clearance may be required when the bearing has tight shaft fit, high operating temperature, heavy load or limited heat dissipation. The final clearance should be confirmed together with shaft tolerance, housing tolerance, speed and lubrication condition.
Can TEDIN supply replacement full complement CRB according to a drawing?
Yes. For replacement or non-standard full complement cylindrical roller bearings, send the drawing, measured dimensions, old bearing designation and application data. TEDIN can check the structure, dimensions, clearance and equivalent series before quotation.
Related Bearing Solutions
Compare related bearing types for radial load, axial location, combined load and heavy-duty equipment applications.
Single Row Cylindrical Roller Bearings
Separable radial bearings for higher-speed shaft support, available in NU, N, NJ and NUP designs.
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Double Row Cylindrical Roller Bearings
High-rigidity radial bearings for compact arrangements, machine tools and heavy-duty machinery.
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Four Row Cylindrical Roller Bearings
Used in rolling mill roll neck positions where very high radial load capacity and rigidity are required.
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Tapered Roller Bearings
Designed for combined radial and axial loads, commonly used in gearboxes, wheel hubs and heavy-duty transmission systems.
View ProductNeed Help Selecting a Full Complement Cylindrical Roller Bearing?
Send us your bearing number, drawing or application data. TEDIN can help check the suitable full complement cylindrical roller bearing design for your equipment.
NCF, NJG, NNCF, NNF, SL series and custom replacement requests are welcome.