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4.056
SUMA
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The SUMA 4.056 Combined Roller Bearing is designed for industrial linear guidance systems that require reliable radial load support, lateral guidance, and compact installation dimensions.
With an outer diameter of 77.7 mm, a width of 54 mm, and a bore diameter of 40 mm, the 4.056 provides a practical balance between load capacity, installation space, and mechanical stability.
It is suitable for equipment such as forklift masts, stackers, lifting systems, metallurgical machinery, cranes, and other material-handling applications where both radial and axial guidance are required.
SUMA can provide the 4.056 bearing as a standard component or with customized mounting solutions, including base plate flange configurations and U-profile mounting arrangements.
A conventional radial roller bearing primarily supports radial loads. However, many industrial linear motion systems also experience lateral forces caused by:
Uneven load distribution
Offset loads
Mast movement
Structural deflection
Acceleration and deceleration
Guide rail misalignment
The combined roller bearing integrates the main roller and side roller arrangement into one compact assembly. The main roller supports the primary radial load, while the side roller helps guide the moving structure and resist lateral forces.
This configuration is particularly useful in forklift mast systems and heavy-duty linear guide applications.
The SUMA 4.056 has a nominal outer diameter of 77.7 mm and a radial dynamic load rating of 48 kN, according to the supplied technical data.
This makes the model suitable for equipment designers looking for a bearing that offers meaningful load capacity without moving immediately to a larger and heavier bearing size.
The 4.056 can be considered when the application requires:
A compact bearing envelope
A 40 mm shaft or mounting arrangement
Stable radial support
Additional lateral guidance
A practical solution for industrial linear movement
The actual suitability must be verified according to the complete load conditions, mating profile, mounting structure, operating environment, and safety requirements.
| Parameter | SUMA 4.056 |
|---|---|
| Product Type | Combined Roller Bearing |
| Model | 4.056 |
| Outer Diameter (D) | 77.7 mm |
| Overall Width (T) | 54 mm |
| Bore Diameter (d) | 40 mm |
| Dimension H | 48.0 mm |
| Dimension h | 36.5 mm |
| Dimension B | 23 mm |
| Dimension A | 3.0 mm |
| Dimension S | 26 mm |
| Chamfer Radius (r) | 4 mm |
| Dynamic Load Rating (C) | 48 kN |
| Radial Static Load Rating (CO) | 56.8 kN |
| COA Value | 18 kN |
| Maximum Speed | 800 rpm |
| Approximate Weight | 1.00 kg |
Note: All dimensions are in millimeters unless otherwise specified. Final selection should be based on the approved product drawing and actual operating conditions.
The technical values above are based on the SUMA 4.053–4.063 combined roller bearing data sheet.
Forklift masts are exposed to vertical loads, lateral forces, vibration, and repeated acceleration and deceleration.
Combined roller bearings are used in mast guidance systems to support the moving mast section and maintain controlled movement along the steel guide structure.
The SUMA 4.056 can be evaluated for:
Forklift mast guide assemblies
Mast extension mechanisms
Lateral guide arrangements
Replacement bearing systems
Material-handling equipment
The final model should be checked against the original bearing dimensions, rail profile, load distribution, and mounting method.
Combined roller bearings are widely associated with forklift masts and heavy-duty linear guidance systems.
Stackers and automated material-handling systems require stable linear movement during lifting, lowering, and positioning.
The 4.056 may be considered for:
Stacker lifting mechanisms
Vertical guide structures
Warehouse handling equipment
Telescopic guide systems
Industrial transfer mechanisms
For automated equipment, buyers should also consider operating cycle frequency, acceleration, guide rail alignment, and maintenance accessibility.
Large lifting equipment can experience both vertical and lateral forces, especially when loads are offset or movement is not perfectly balanced.
Combined roller bearings can be used in suitable linear guide arrangements for:
Lifting platforms
Guide mechanisms
Heavy material-handling systems
Industrial lifting structures
Horizontal or vertical guide assemblies
The bearing size must be selected based on the complete working load, including dynamic and impact effects.
The supplied SUMA application information includes metallurgical industries and large lifting equipment.
Potential applications include:
Steel-handling equipment
Industrial lifting mechanisms
Guide systems
Material transfer equipment
Heavy-duty linear movement systems
For high-temperature or abrasive environments, the customer should provide information about temperature, dust, scale, lubrication, and sealing requirements before ordering.
The SUMA product information identifies forklifts, stackers, metallurgical industries, container front forks, cranes, and other lifting equipment as application areas.
Different equipment manufacturers use different installation structures. SUMA can provide combined roller bearing solutions according to the customer's mounting requirements.
A base plate flange configuration can be used when the bearing needs to be installed on a supporting plate or fabricated mounting structure.
Potential benefits include:
Simplified installation
Easier replacement
Reduced fabrication work
More convenient assembly positioning
Compatibility with specific equipment structures
The mounting plate dimensions, hole pattern, material, and welding or fastening method should be confirmed according to the customer’s drawing.
The 4.056 can also be evaluated for applications using a U-profile mounting structure.
This configuration may be suitable for equipment where the bearing is integrated into a channel-shaped or U-profile support arrangement.
Before production, the following information should be confirmed:
U-profile dimensions
Bearing mounting position
Shaft or pin size
Available clearance
Load direction
Installation and replacement method
Required adjustment function
SUMA can supply both base plate flange and U-profile mounting solutions according to the equipment design.
The 4.056 belongs to the SUMA 4.053–4.063 combined roller bearing series.
The following models have similar or related dimensional characteristics and should be compared during preliminary selection.
| Model | Outer Diameter | Width | Bore | Dynamic Load Rating | Maximum Speed |
|---|---|---|---|---|---|
| 4.055 | 70.1 mm | 48 mm | 35 mm | 45.5 kN | 900 rpm |
| 4.056 | 77.7 mm | 54 mm | 40 mm | 48 kN | 800 rpm |
| 4.057 | 77.7 mm | 53 mm | 40 mm | 48 kN | 800 rpm |
| 4.058 | 88.4 mm | 59 mm | 45 mm | 68 kN | 750 rpm |
The 4.056 and 4.057 share the same listed outer diameter, bore, and radial load ratings, but their dimensional configurations differ.
When replacing an existing bearing, do not select the model based only on outer diameter or bore. The complete dimensions, side roller position, mounting arrangement, and guide profile must be checked.
The comparison data is based on the SUMA technical parameter table.
