Full Complement Cylindrical Roller Bearings
Full complement cylindrical roller bearings use a no-cage design to fit more rollers in the same bearing envelope. They are selected for low-speed, heavy-radial-load applications where NCF, NJG, NNCF, NNF or SL equivalent series are required.
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
The main difference between NCF, NJG, NNCF and NNF full complement cylindrical roller bearings is the row arrangement, rib layout, axial locating function and sealing design. These designs are usually checked separately from standard cylindrical roller bearings because the no-cage structure gives higher radial load capacity but lower speed capability.
NCF Series
- Axial function: locates the shaft in one direction
- Design point: full roller set with retaining ring arrangement
- Typical use: high radial load positions with limited axial guidance
NJG Series
- Axial function: supports axial load in one direction
- Design point: NJ-type rib layout with a full complement of rollers
- Typical use: slow-running positions with shock load or heavy radial load
NNCF Series
- Axial function: depends on ring and rib arrangement
- Design point: double-row roller set for higher radial stiffness
- Typical use: compact bearing positions where radial capacity is limited by space
NNF Series
- Axial function: varies by exact bearing construction
- Design point: double-row full complement design with integral seals
- Typical use: sheaves, pulleys, guide rollers and contaminated areas
SL Equivalent Series
SL designations are commonly used for full complement cylindrical roller bearing equivalents and replacements. Depending on the number group, they may correspond to single-row, double-row or sealed full complement designs, including SL18, SL19, SL01, SL02, SL04 and SL0450 series.
For replacement work, do not rely only on the SL prefix. Please check the internal design, ring arrangement, sealing type and boundary dimensions before confirming an interchange.
Full Complement vs Caged Cylindrical Roller Bearings
The choice is usually simple: full complement cylindrical roller bearings are used when radial load comes first. Caged cylindrical roller bearings are preferred when speed, heat control and roller guidance are more important.
What Changes in the Design?
| Factor | Full Complement CRB | Caged CRB |
|---|---|---|
| Roller arrangement | No cage, so more rollers can be fitted in the same space | Uses a cage to separate and guide the rollers |
| Radial load capacity | Higher radial capacity, especially in compact bearing positions | Good radial capacity, but less roller contact area than full complement designs |
| Speed capability | Best suited to low-speed or moderate-speed operation | Better choice for higher speed and continuous rotation |
| Lubrication demand | Needs reliable lubrication because roller-to-roller contact can increase friction | Usually easier to lubricate and more forgiving in normal running conditions |
| Heat behavior | More sensitive to lubricant starvation, over-speeding and poor heat dissipation | Better heat control because the cage improves roller guidance |
| Typical selection | Heavy radial load, shock load, slow-running shafts, pulleys and guide rollers | Motors, gearboxes, pumps, compressors and applications with higher running speed |
How to Select Full Complement Cylindrical Roller Bearings
A full complement cylindrical roller bearing is usually selected when radial load capacity is more important than speed. Before confirming NCF, NJG, NNCF, NNF or SL equivalent series, check the working load, running speed, lubrication method, axial locating function and internal clearance.
Load
Start with the radial load and shock load. Full complement bearings are normally used where load capacity is the main limit.
Speed
Check the limiting speed early. A no-cage roller set is not intended for high-speed operation.
Lubrication
Confirm oil bath, oil circulation or a reliable grease interval, especially under heavy load.
Axial Location
Match the required locating function with the rib arrangement of NCF, NJG, NNCF or NNF designs.
Clearance
Choose normal, C3 or special clearance after checking shaft fit, housing fit and temperature rise.
Mounting Fit
Check fits and mounting conditions to avoid preload, creep or abnormal heat during operation.
Checks Before SL or Equivalent Replacement
SL18, SL19, SL01, SL02, SL04 and SL0450 series are often used as replacement references. Before interchange, confirm the construction details instead of relying only on the bearing prefix.
| Check Item | What to Confirm | Possible Issue |
|---|---|---|
| Speed | Compare the actual working speed with the bearing limit speed | Heat rise or roller skidding |
| Lubrication | Confirm oil bath, oil circulation, grease type and relubrication interval | Roller wear or lubricant starvation |
| Clearance | Select clearance after checking interference fit and operating temperature | Preload, vibration or shortened life |
| Axial location | Check locating direction, rib arrangement and ring movement | Unexpected axial movement |
| Seal type | Confirm open, sealed, shielded or grease-filled construction | Contamination, leakage or wrong lubrication plan |
| SL interchange | Check boundary dimensions, internal design, seals and clearance suffix | Wrong replacement or installation mismatch |
Typical Bearing Positions for Full Complement Cylindrical Roller Bearings
Full complement cylindrical roller bearings are often used in slow-running bearing positions where radial load, shock load or limited mounting space is the main concern. The final series selection still depends on speed, lubrication, sealing and axial locating requirements.
Sheaves, Pulleys and Guide Rollers
Check seal type, grease retention, relubrication interval and the condition of the pulley bore.
Gearboxes and Reducers
Check internal clearance, shaft fit, housing fit and whether the oil supply reaches the roller set.
Rolling Mill Auxiliary Equipment
Check fit tolerance, load direction, operating temperature and whether shock load occurs repeatedly.
Mining and Heavy-Duty Equipment
Check sealing arrangement, grease interval, contamination level and housing protection.
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.
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.