JW7049 / JW7010 TIMKEN 70x140x39 mm Tapered Roller Bearing

JW7049 / JW7010 TIMKEN 70x140x39 mm Tapered Roller Bearing

JW7049 / JW7010 TIMKEN 70x140x39 mm is a complete single-row tapered roller bearing set consisting of the JW7049 cone assembly and JW7010 outer ring, or cup. The complete bearing has a 70 mm bore diameter, 140 mm outside diameter and 39 mm overall width. Its tapered roller design is intended to accommodate combined radial and axial loads in correctly designed bearing arrangements.

Technical data - TIMKEN JW7049 / JW7010

The principal dimensions and design factors correspond to TIMKEN technical data for the JW7049 / JW7010 bearing set.

Is JW 7049/10 a complete bearing?

Yes. When the designation JW 7049/10 is used as the abbreviated form of JW7049 / JW7010, it identifies the complete tapered roller bearing set.

The complete set consists of:

• JW7049 - cone assembly
• JW7010 - cup
• JW7049 / JW7010 - complete tapered roller bearing

The JW7049 cone assembly includes the inner ring, tapered rollers and cage.

The JW7010 designation identifies the separate outer ring, commonly called the cup.

Therefore, JW7049 alone and JW7010 alone are bearing components, while JW7049 / JW7010 identifies the complete matched bearing set.

What does JW7049 / JW7010 mean?

TIMKEN tapered roller bearings use separate designations for the cone and cup.

For this bearing:

JW7049 = cone

The cone assembly consists of:

• inner ring
• tapered rollers
• cage

JW7010 = cup

The cup is:

• the outer bearing ring

Together, JW7049 and JW7010 form the complete single-row tapered roller bearing.

This distinction is important when ordering replacement parts because purchasing only JW7049 or only JW7010 does not provide the complete bearing set.

Dimensions of TIMKEN JW7049 / JW7010

The principal dimensions of the complete bearing are:

70x140x39 mm

where:

• d = 70 mm - bore diameter
• D = 140 mm - outside diameter
• T = 39 mm - overall bearing width

TIMKEN additionally specifies:

• B = 35.5 mm - cone width
• C = 27 mm - cup width

These dimensions describe different parts of the tapered roller bearing geometry.

Why are both 39 mm and 35.5 mm found for this bearing?

Both values are correct, but they describe different dimensions.

For JW7049 / JW7010:

• T = 39 mm - overall width of the complete bearing
• B = 35.5 mm - cone width
• C = 27 mm - cup width

Therefore, the correct principal dimensions of the complete JW7049 / JW7010 bearing are:

70x140x39 mm

A specification of 70x140x35.5 mm refers to the cone width B rather than the total assembled bearing width T.

This distinction is important when identifying the bearing by dimensions.

TS - Tapered Single design

TIMKEN classifies JW7049 / JW7010 as a TS - Tapered Single bearing.

TS is the basic single-row tapered roller bearing design.

The bearing consists of two separable major components:

• cone assembly
• cup

The separable construction facilitates installation and adjustment in many bearing arrangements.

Correct assembly requires the appropriate cone and cup combination.

How does a tapered roller bearing work?

Tapered roller bearings use tapered rolling elements operating between tapered raceways.

The geometry is designed so that the rolling surfaces work together to support combined loads.

This enables a single-row tapered roller bearing to accommodate:

• radial loads
• axial loads
• combined radial and axial loads

Axial load capacity is related to the internal bearing geometry.

TIMKEN specifies an e factor of 0.87 and K factor of 0.67 for JW7049 / JW7010.

These factors are relevant to engineering calculations and should be used according to the manufacturer's calculation procedures.

Separable cone and cup construction

A major characteristic of tapered roller bearings is their separable design.

The JW7049 cone assembly can be separated from the JW7010 cup.

This can simplify installation, inspection and servicing, but the correct components must be paired.

A cup should not be selected solely because its outside diameter is 140 mm.

Likewise, a cone should not be selected only because its bore diameter is 70 mm.

The raceway geometry and bearing design must correspond to the correct cone and cup combination.

JW7049 cone

JW7049 identifies the cone assembly.

It includes:

• inner ring
• tapered rollers
• cage

JW7049 by itself is therefore not the complete bearing because the JW7010 outer ring is also required to create the complete JW7049 / JW7010 bearing set.

JW7010 cup

JW7010 identifies the cup or outer ring.

It contains the outer raceway on which the tapered rollers operate.

JW7010 alone is therefore not a complete bearing.

For the complete bearing described on this product page, the JW7010 cup is combined with the JW7049 cone assembly.

JW 7049/10 vs JW7049/JW7010

The designation:

JW 7049/10

can be encountered as an abbreviated commercial notation.

The more explicit designation is:

JW7049 / JW7010

Using both numbers in full clearly identifies the two bearing components and reduces ambiguity when ordering or searching technical catalogues.

For technical product identification, JW7049 / JW7010 is therefore the preferred notation.

Alternative designations and search references

Natural designation variants include:

• TIMKEN JW7049 / JW7010
• TIMKEN JW7049/JW7010
• JW7049 / JW7010 TIMKEN
• JW7049/JW7010 TIMKEN
• JW 7049/10 TIMKEN
• TIMKEN JW 7049/10
• JW7049 JW7010
• JW7049/JW7010
• JW7049-7010
• JW7049 bearing
• JW7010 bearing cup
• JW7049 cone
• JW7010 cup
• JW7049/JW7010 bearing
• JW7049/JW7010 tapered roller bearing
• TIMKEN bearing 70x140x39
• tapered roller bearing 70x140x39 mm

These are natural designation and search variants. They do not establish interchangeability with products from other manufacturers.

How to select a replacement for JW7049 / JW7010

Before selecting an alternative bearing, verify:

• 70 mm bore diameter
• 140 mm outside diameter
• 39 mm overall width T
• 35.5 mm cone width B
• 27 mm cup width C
• single-row tapered roller construction
• cone designation
• cup designation
• internal bearing geometry
• required load capacity
• required operating clearance or preload
• lubrication conditions
• operating speed
• shaft and housing fits
• requirements of the specific machine

Matching dimensions alone do not guarantee complete functional interchangeability.

Bearing clearance and preload

Tapered roller bearings are sensitive to the way the bearing arrangement is adjusted.

Depending on the application, the system may require a specified operating clearance or preload.

Incorrect adjustment can contribute to:

• excessive heat generation
• increased friction
• excessive internal clearance
• reduced bearing life
• poor shaft guidance
• premature bearing damage

The required setting depends on the complete bearing arrangement and should follow the machine manufacturer's or bearing manufacturer's engineering requirements.

Typical applications of tapered roller bearings

Single-row tapered roller bearings are widely used in machinery where radial and axial loads occur simultaneously.

Typical application areas for this bearing category include:

• industrial gearboxes
• transmissions
• drive systems
• agricultural machinery
• construction machinery
• material handling equipment
• industrial machinery
• heavy production equipment
• shaft assemblies
• conveyor systems
• maintenance operations
• industrial service

These are typical applications of tapered roller bearings as a product category. They do not confirm that JW7049 / JW7010 is specified for a particular machine, vehicle or OEM application.

Installation of JW7049 / JW7010

Before installation, inspect the shaft, housing and all mating surfaces.

Good installation practice includes:

• maintaining high cleanliness
• protecting the raceways and rollers from contamination
• avoiding direct impacts on the bearing
• using appropriate mounting tools
• checking shaft and housing fits
• using the correct lubricant
• correctly pairing the JW7049 cone with the JW7010 cup
• setting the required clearance or preload

Mounting force should not be transmitted through the tapered rollers in a way that could damage the raceways.

Correct adjustment is particularly important for tapered roller bearing arrangements.

FAQ - TIMKEN JW7049 / JW7010

Is TIMKEN JW 7049/10 a complete bearing?

Yes, when JW 7049/10 is used as the abbreviated designation for JW7049 / JW7010, it refers to the complete tapered roller bearing set consisting of the JW7049 cone and JW7010 cup.

What are the dimensions of JW7049 / JW7010?

The complete bearing has a 70 mm bore diameter, 140 mm outside diameter and 39 mm overall width. Its principal dimensions are 70x140x39 mm.

What is JW7049?

JW7049 is the cone assembly consisting of the inner ring, tapered rollers and cage. JW7049 alone is not the complete bearing.

What is JW7010?

JW7010 is the cup, or outer ring, of the tapered roller bearing. JW7010 alone is not the complete bearing.

Why is 35.5 mm also listed as a width?

35.5 mm is the cone width B. The overall width T of the complete JW7049 / JW7010 bearing is 39 mm.

Is JW7049 / JW7010 a single-row bearing?

Yes. TIMKEN classifies this bearing as a TS - Tapered Single, which is a single-row tapered roller bearing design.

Can the cone and cup be separated?

Yes. Tapered roller bearings of this design are separable. The JW7049 cone assembly and JW7010 cup can be installed separately before forming the complete bearing arrangement.

Can another 70x140x39 bearing replace JW7049 / JW7010?

Not automatically. In addition to dimensions, the internal geometry, load capacity, cone and cup design, setting requirements, fits and operating conditions must be checked.

TIMKEN JW7049 / JW7010 70x140x39 mm - key information

TIMKEN JW7049 / JW7010 is a complete single-row tapered roller bearing set with dimensions of 70x140x39 mm. It consists of the JW7049 cone assembly and JW7010 cup. The overall width T is 39 mm, cone width B is 35.5 mm and cup width C is 27 mm. The tapered roller design accommodates combined radial and axial loads.

Availability from simmering.pl

TIMKEN JW7049 / JW7010 70x140x39 mm tapered roller bearing is available from simmering.pl for industrial customers, maintenance departments, machine manufacturers, technical services, distributors and B2B procurement.

simmering.pl supplies industrial bearings and technical sealing products from stock in Poland, with worldwide shipping available.