TDI Double Row Tapered Roller Bearings
TDI double row tapered roller bearings use a double cone and two single cups. They are selected for rigid shaft location, combined loads, and heavy-duty industrial equipment.
Double Cone + Two Cups
TDI design supports shaft location from the cone side and allows cup-side assembly control.
What Is a TDI Double Row Tapered Roller Bearing?
A TDI type double row tapered roller bearing uses one double cone and two single cups to support shaft location and combined load conditions.
In a TDI design, the double cone is mounted on the shaft, while two separate cups are installed from the housing side.
This structure is often used where the bearing must locate the shaft, carry radial and axial loads, and maintain a controlled internal setting during assembly.
Engineering note
For replacement projects, confirm the bearing number, cup and cone references, total width, and axial clearance before ordering.
Double Cone
One double inner ring assembly carries two rows of tapered rollers and supports shaft-side location.
Two Single Cups
Two separate outer rings allow cup-side installation and help control the final bearing setting.
Axial Setting
Clearance or preload may be controlled through cup position, spacers, or matched components.
Heavy-Duty Fit
Suitable for gearboxes, mining machinery, rolling equipment, and other combined-load applications.
Load Path and Internal Setting of TDI Bearings
In a TDI double row tapered roller bearing, load is transferred from the shaft through the double cone and rollers to the two single cups and housing.
Shaft Load
Radial and axial forces enter the bearing from the shaft.
Double Cone
The double cone supports both roller rows on the shaft side.
Tapered Rollers
Rollers distribute combined loads along the raceway contact.
Two Single Cups
Separate cups receive the load and help control the setting.
Housing Support
Load is finally transferred to the bearing seat and housing.
High Radial Capacity
Two roller rows provide stable support for heavy radial loads in compact bearing positions.
Axial Location in Both Directions
The opposed tapered geometry allows the bearing to support axial forces from either direction.
Clearance or Preload Control
Internal setting should be checked by bearing number, cup position, spacer design, or assembly drawing.
Size & Custom Supply for TDI Bearings
TEDIN supplies TDI type tapered roller bearings in standard and custom configurations, covering large dimensions, high precision grades, cage material options, and different roller structures for heavy-duty applications.
Large Size Range
Outer diameter up to 1000 mm.
Precision Grades
Available precision levels include P5 / P4 / P2.
Cage Material Options
Cage materials can be selected according to load, speed, and working conditions.
Roller Structure Options
Solid rollers, rollers with tapered pin holes, hollow rollers, and more.
Drawing-Based Supply
Production based on drawings, samples, or special technical requirements.
Clearance Setting
End play or preload confirmation support for assembly requirements.
Request a quote: Send bearing number, drawing, sample, or d × D × T.
Request a QuoteTDI Bearing Application & Selection Matrix
Match the equipment type with the load and mounting condition to decide whether a TDI double row tapered roller bearing is suitable.
Rolling Mills
Roll necks / mill gear units
High radial load + axial shock
Suitable where load changes quickly and axial forces act from both directions.
Industrial Gearboxes
Output shafts / reducers
Compact shaft location
Useful when the shaft side requires a double cone arrangement in limited axial space.
Mining Machinery
Crushers / conveyors
Impact load + two-way thrust
Supports heavy radial force while helping control thrust loads in harsh equipment.
Construction Equipment
Axles / transmission units
Limited width + combined load
Selected where radial and axial loads must be carried within a compact bearing position.
Railway & Heavy Vehicles
Axleboxes / drive systems
Stable axial setting
Helps maintain shaft support where end play or preload must be checked during assembly.
Selection tip: If your equipment has similar load and mounting conditions, TEDIN can check the TDI structure by drawing or original part number.
Check Your BearingTDI vs TDO Double Row Tapered Roller Bearings
TDI and TDO bearings belong to the same double row tapered roller bearing family, but their ring arrangement, mounting logic, and setting control are different.
Double Cone + Two Single Cups
TDI bearings use one double cone on the shaft side and two separate cups on the housing side.
- Cone assembly is usually located on the shaft.
- Cups are installed separately from the housing side.
- Axial clearance or preload must be confirmed before replacement.
Double Cup + Two Single Cones
TDO bearings use one double cup on the housing side and two cone assemblies on the shaft side.
- Double cup is usually located in the housing.
- Two cone assemblies are mounted from the shaft side.
- Spacer, fit, and end-play settings may differ from TDI designs.
Before Choosing Between TDI and TDO, Check These Points
For replacement or drawing-based production, the structure name alone is not enough. Confirm the locating side, assembly sequence, setting method, and original bearing references before selection.
Bearing Location Side
Confirm whether the shaft shoulder or housing shoulder is used as the main locating reference.
Assembly Sequence
Check which ring is installed first during maintenance and whether the bearing position allows separate mounting.
Clearance or Preload Control
Identify whether axial clearance, end play, or preload is controlled by cup spacing, cone spacing, or matched parts.
Spacer and Shoulder Design
Review shaft shoulders, housing shoulders, end caps, spacer rings, and locking components in the original design.
Replacement Condition
Do not judge interchangeability only by bore diameter, outside diameter, and total width.
Drawing or Part Number
Provide the original bearing number, technical drawing, sample dimensions, or application information for confirmation.
Quality Checked Before Delivery
Key inspection steps help ensure dimensional accuracy, stable assembly, and reliable operation of TDI type tapered roller bearings.
MaterialMaterial Check
Steel and heat treatment verified.
DimensionsDimensional Inspection
Bore, OD, width, and runout checked.
ClearanceClearance Check
Axial clearance or preload confirmed.
FinalFinal Inspection
Assembly and appearance verified.
FAQ for Sourcing TDI Type Tapered Roller Bearings
Find answers to common sourcing questions about custom TDI bearing production, replacement, inspection, packaging, and export supply.
Looking for a replacement?
Send the bearing number, drawing, dimensions, or sample photos. TEDIN can help identify the structure and confirm a suitable TDI bearing solution.
Can TEDIN manufacture custom TDI type tapered roller bearings?
Yes. TEDIN can produce TDI type tapered roller bearings according to drawings, samples, original part numbers, special dimensions, precision grades, and application requirements.
Can you replace old or hard-to-find TDI bearing numbers?
Yes. If the original bearing is discontinued or difficult to source, please send the bearing number, dimensions, photos, or sample. TEDIN can help check interchange or custom replacement options.
What information is needed for a quotation?
Useful information includes bearing number, d × D × T dimensions, drawing, quantity, application equipment, precision grade, clearance or preload requirement, and delivery destination.
Do you supply large-size TDI bearings?
Yes. TEDIN supports large-size and heavy-duty TDI bearings for rolling mills, gearboxes, mining machinery, cranes, reducers, and other industrial equipment.
Can clearance or preload be controlled?
Yes. Axial clearance, end play, or preload can be checked according to the bearing design and application requirements.
How do you check quality before shipment?
TEDIN checks key dimensions, raceway condition, assembly, clearance, appearance, marking, and packaging before delivery.
Can you provide export packaging?
Yes. Bearings can be protected with anti-rust oil, wrapping, cartons, wooden cases, or customized export packaging according to shipment requirements.
Need TDI Type Tapered Roller Bearings?
Send your bearing number, drawing, dimensions, or operating requirements. TEDIN can support TDI bearing replacement, custom production, and large-size tapered roller bearing supply for heavy-duty equipment.
Standard replacement and custom TDI tapered roller bearing inquiries are welcome.