DTR-T Type Slewing Ring Bearing (for Tunnel Boring Machines, External Gear)
DTR-T形 / JTEKT Corporation (Official website)
External gear slewing ring bearing with bore diameter of 1055 to 3450 mm. Three-row combined cylindrical roller structure for tunnel boring machines.
Last verified: (date the content was verified against the source document)
Specifications
| Inner diameter d | 1055〜3450 mm |
|---|---|
| Basic static load rating C0a | 15100〜200000 kN |
| Mass | 1370〜25600 kg |
| Gear Pressure Angle | 20 ° |
DTR-T形 model comparison
Compare 3 models in the same series by specification.
| Model | Inner diameter d | Basic static load rating C0a | Gear Pressure Angle | Mass |
|---|---|---|---|---|
| DTR-T形旋回座軸受（トンネル掘進機用・内歯） | 1372〜3996 mm | 11500〜90000 kN | 20 ° | 1050〜10500 kg |
| DTR-T形旋回座軸受（トンネル掘進機用・外歯） This product | 1055〜3450 mm | 15100〜200000 kN | 20 ° | 1370〜25600 kg |
| 旋回座軸受 DTR-T形（3列複合円筒ころタイプ・トンネル掘進機用） | — | — | — | — |
How to choose Slewing Ring Bearings
Points to check when selecting, with the values for this product (DTR-T Type Slewing Ring Bearing (for Tunnel Boring Machines, External Gear)).
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1. Select a structure that suits load and moment
Single-row ball type is compact and suited to general construction machinery and cranes; three-row combined cylindrical roller type offers high rigidity and rated load for large cranes and tunnel boring machines; double-row tapered roller type can carry high axial load thanks to its large contact angle. Select the type based on the magnitude of moment load and impact.
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2. Allow margin in static rated load
This product: Basic static load rating C0a 15100〜200000 kNBecause slewing bearings often operate at low speed or oscillate, the basic static rated load in the axial direction, C0a, is the primary selection criterion. Listed products range widely from 341 to 394000 kN. Convert maximum load and moment to equivalent load, and compare products with a safety factor appropriate to the application.
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3. Match mounting diameter and support structure dimensions
This product: Inner diameter d 1055〜3450 mmBore diameter d and outside diameter D determine the mounting surface on the support structure or rotating body, the bolt hole layout, and the space for piping and cables passing through the center. Listed bore diameters range from a few mm to 6457 mm. For large-diameter products, a split design makes transport and assembly easier.
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4. Confirm gear position and specifications
This product: Gear Pressure Angle 20 °Whether to choose ungeared, internal-tooth or external-tooth types depends on the layout of the drive pinion. Listed products have a pressure angle of 20°. Match the tooth profile (standard or low-profile teeth) and the JIS gear accuracy grade with the pinion side, and consider surface and root induction hardening as required.
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5. Select sealing and lubrication method for the operating environment
In environments exposed to soil or water pressure, some products offer pressure-resistant seals with a static withstand pressure of 0.3 MPa in addition to labyrinth and dust seals. Check the presence of grease nipples and drain ports, and whether grease feeding, oil bath or forced circulation lubrication is used, in line with the maintenance plan.
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6. Estimate handling and installation method from mass
This product: Mass 1370〜25600 kgListed products vary widely in mass, from 1 to 45800 kg. Large units are constrained by lifting equipment, crane capacity and transport dimensions, so verify the mass and, if necessary, consider circumferentially split designs (two-piece or four-piece).
This guide was written by AI based on the listed products' documents and specification items.
Description
External gear slewing ring bearing with a three-row combined cylindrical roller design, developed for tunnel boring machines. Some models are available in unsealed specifications.
Features
- Three-row combined cylindrical roller structure
- With external gear teeth
- Pressure angle 20°
Applications
- Tunnel boring machines
FAQ
- Q. What applications can the DTR-T Type Slewing Ring Bearing (for Tunnel Boring Machines, External Gear) be used for?
- A. It is an external gear slewing ring bearing with a three-row combined cylindrical roller design, developed for tunnel boring machines.
- Q. What are the range of bore diameter and basic static load rating of the DTR-T Type Slewing Ring Bearing?
- A. Bore diameter d is 1055 to 3450 mm, and basic static load rating C0a is 15100 to 200000 kN.
- Q. What are the mass and gear pressure angle of the DTR-T Type Slewing Ring Bearing?
- A. Mass is 1370 to 25600 kg, and gear pressure angle is 20 °.
- Q. Are there any DTR-T Type Slewing Ring Bearing models without seals?
- A. Some models are available in unsealed specifications.
Written by AI based on the content of the source documents.
Source documents
- Catalog 旋回座軸受
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