81217-TV INA 85x125x31 mm - Axial Cylindrical Roller Bearing

81217-TV INA 85x125x31 mm - Axial Cylindrical Roller Bearing

INA 81217-TV is a single-direction axial cylindrical roller bearing with dimensions 85x125x31 mm, belonging to the 812 series. Its cylindrical roller design is intended to accommodate high axial loads acting in one direction and provides high axial rigidity. The TV suffix identifies the cage execution used in this INA bearing.

Technical data

INA 81217-TV dimensions

The basic dimensions are:

d: 85 mm
D: 125 mm
T: 31 mm

Complete dimensional specification:

85x125x31 mm

When selecting a replacement, the 85 mm bore, 125 mm outside diameter and 31 mm height should all be verified together with the 812 series and complete bearing designation.

What does 81217-TV mean?

The complete designation 81217-TV identifies the specific INA axial cylindrical roller bearing version.

812 - axial cylindrical roller bearing series designed for high axial load capacity.

17 - size code corresponding to an 85 mm bore for this bearing.

TV - cage execution used in this INA version.

The complete designation should be retained when identifying or ordering a replacement bearing.

INA 81217-TV construction

An axial cylindrical roller bearing of the 812 series essentially consists of:

• shaft locating washer,
• housing locating washer,
• cylindrical roller and cage assembly.

The bearing has a separable design, allowing its main components to be installed separately.

The cylindrical rollers provide line contact with the raceways, enabling high axial load capacity and high axial rigidity within relatively compact installation dimensions.

What loads can 81217-TV accommodate?

INA 81217-TV is an axial bearing, so its primary function is to accommodate axial loads.

The bearing:

• accommodates axial loads,
• locates the shaft axially in one direction,
• is not designed to accommodate radial loads.

If radial loads are present in the bearing arrangement, they must be supported by a suitable radial bearing.

Why cylindrical rollers?

Cylindrical rollers provide line contact with the raceways rather than the point contact associated with ball bearings.

This design provides:

• high axial load capacity,
• high axial rigidity,
• compact construction,
• effective operation under substantial axial loads.

For this reason, 812-series bearings are particularly suitable for bearing arrangements where axial load capacity and rigidity are key requirements.

812 series vs 811 series

INA axial cylindrical roller bearings are available in different dimensional series, including 811 and 812.

The 812 series has a larger cross-section than the corresponding lighter 811 series and is designed for applications requiring greater axial load capacity.

Bearings from these series should not be considered interchangeable solely because they have the same bore diameter. Outside diameter, height and load-carrying characteristics may differ.

Separable bearing design

An important feature of INA 81217-TV is its separable construction.

This allows the main components to be installed independently and can simplify:

• assembly,
• positioning of the bearing washers,
• servicing,
• disassembly of the bearing arrangement.

Correct orientation and alignment of the washers and roller-and-cage assembly are essential during installation.

Selection and interchangeability

When selecting INA 81217-TV, verify:

• complete 81217-TV designation,
• 85 mm bore diameter,
• 125 mm outside diameter,
• 31 mm height,
• axial cylindrical roller construction,
• required axial load capacity,
• direction of axial load,
• operating speed,
• cage execution,
• lubrication conditions,
• accuracy and geometry of mating surfaces.

Matching the basic dimensions alone does not confirm complete technical interchangeability.

Applications

812-series axial cylindrical roller bearings are intended for bearing arrangements where high axial loads must be accommodated and high axial rigidity is required.

The suitability of INA 81217-TV for a specific application should be determined according to actual axial load, operating speed, lubrication, required service life and the overall bearing arrangement.

Installation and operation

Correct support and alignment of the bearing components are particularly important during installation.

Mating surfaces should be clean and properly prepared. Misalignment can result in uneven roller loading and reduced bearing service life.

Suitable lubrication must also be provided according to the operating conditions of the bearing arrangement.

Alternative designations and search references

• INA 81217-TV
• 81217-TV INA
• 81217 TV INA
• INA 81217 TV
• 81217-TV 85x125x31
• INA 81217-TV 85x125x31
• 81217 85x125x31
• 81217 axial roller bearing
• 81217 thrust roller bearing
• 81217 axial cylindrical roller bearing

FAQ - INA 81217-TV

What are the dimensions of INA 81217-TV?

The bearing measures 85x125x31 mm, with an 85 mm bore, 125 mm outside diameter and 31 mm height.

What type of bearing is INA 81217-TV?

It is a single-direction axial cylindrical roller bearing.

What loads can INA 81217-TV accommodate?

It is designed primarily to accommodate high axial loads acting in one direction.

Can INA 81217-TV accommodate radial loads?

No. Radial loads must be supported by another bearing suitable for radial loading.

Is INA 81217-TV separable?

Yes. Its main components can be installed separately.

What does TV mean in 81217-TV?

TV identifies the cage execution used in this INA bearing version.

What is the difference between the 812 and 811 series?

The 812 series has a larger cross-section and is designed for greater axial load capacity than the corresponding lighter 811 series.

Can any 85x125x31 mm bearing replace INA 81217-TV?

Not automatically. The bearing design, load capacity, cage execution, speed and lubrication requirements must also be considered.

INA 81217-TV - key information

INA 81217-TV 85x125x31 mm is a single-direction axial cylindrical roller bearing from the 812 series. Its cylindrical roller construction provides high axial load capacity and axial rigidity. The bearing has a separable design and is intended for axial loads; it is not designed to accommodate radial loads.

Available from simmering.pl, a specialist supplier of bearings and industrial components. Stock in Poland with worldwide shipping.