SKF YAT 205 25x52x27.2 mm - Insert Bearing with Grub Screws

SKF YAT 205 25x52x27.2 mm - Insert Bearing with Grub Screws

SKF YAT 205 is a single-row ball insert bearing measuring 25x52x27.2 mm. It features a spherical outside surface, an inner ring extended on one side and shaft locking by means of two grub screws. The bearing is sealed on both sides, designed for relubrication and intended for installation in a suitable bearing housing.

Technical Data - SKF YAT 205

What Does SKF YAT 205 Mean?

The complete product designation is:

SKF YAT 205

SKF is the manufacturer.

YAT identifies a specific SKF insert bearing design. In this version, the inner ring is extended on one side and the bearing is secured to the shaft by means of two grub screws.

205 identifies the bearing size. SKF YAT 205 has a 25 mm bore and 52 mm outside diameter.

The complete designation:

YAT 205

should be retained when ordering or identifying the bearing.

The product should not be identified simply as "205", because other bearings and insert bearings in size series 205 may have the same principal diameters but different geometry, width and shaft locking arrangements.

SKF YAT 205 Dimensions

The principal dimensions are:

25x52x27.2 mm

where:

• d = 25 mm - bore diameter
• D = 52 mm - outside diameter
• B = 27.2 mm - overall width

Additional dimensions specified for the bearing include:

• C = 15 mm - outer ring width
• d1 = approx. 33.7 mm
• B4 = 5 mm
• s1 = 19.5 mm
• r1,2 min. = 0.6 mm

For correct identification of an insert bearing, the 25x52 mm bore and outside diameter alone are not sufficient.

The 27.2 mm overall width, inner ring design and shaft locking method are also important.

SKF YAT 205 Construction

SKF YAT 205 is a single-row ball insert bearing designed to operate in a suitable bearing housing.

Its construction includes:

• inner ring with cylindrical bore,
• inner ring extended on one side,
• two grub screws for shaft locking,
• outer ring with spherical outside surface,
• single row of balls,
• cage,
• seals on both sides,
• relubrication capability.

The spherical outside surface is designed to mate with the corresponding spherical seating of a suitable housing.

This arrangement enables the complete bearing unit to accommodate initial misalignment resulting from mounting.

Shaft Locking with Two Grub Screws

One of the defining features of SKF YAT 205 is its shaft locking system.

The bearing is secured using:

two grub screws

The grub screws are positioned in the extended section of the inner ring and secure the bearing to the shaft.

For SKF YAT 205, the specified fastening details include:

• grub screw thread: M6x0.75
• hexagonal key size: 3 mm
• recommended tightening torque: 4 Nm

The locking method is an important consideration when selecting a replacement.

A 25x52 mm insert bearing using an eccentric locking collar, adapter sleeve or another shaft locking system should not automatically be considered equivalent to SKF YAT 205.

Spherical Outside Surface

SKF YAT 205 has an outer ring with a:

spherical outside surface

This surface is designed to operate in the corresponding spherical seating of an appropriate bearing housing.

The arrangement allows the complete bearing unit to accommodate initial alignment errors caused by mounting.

This is one of the major construction differences between YAT 205 and a conventional deep groove ball bearing with similar bore and outside diameters.

SKF YAT 205 Sealing

SKF YAT 205 is:

sealed on both sides

The sealing arrangement helps to:

• reduce the ingress of contaminants,
• retain lubricant around the rolling elements,
• protect the balls and raceways during operation.

The YAT 205 design also permits relubrication.

When the bearing is installed in a housing, the lubrication arrangement of the complete bearing unit should be considered.

SKF YAT 205 Load Ratings

SKF specifies the following load ratings for YAT 205:

C = 14 kN

Basic dynamic load rating.

C0 = 7.8 kN

Basic static load rating.

Pu = 0.335 kN

Fatigue load limit.

These parameters apply specifically to SKF YAT 205.

They should not automatically be transferred to other insert bearings with 25x52 mm principal dimensions.

SKF YAT 205 Limiting Speed

SKF specifies a limiting speed of:

7000 r/min

When determining an appropriate operating speed, additional factors should be considered, including:

• shaft tolerance,
• shaft locking arrangement,
• applied load,
• lubrication conditions,
• operating temperature,
• seal condition,
• operating conditions of the complete bearing unit.

SKF YAT 205 vs SKF 6205

SKF YAT 205 is not the same product as a conventional SKF 6205 deep groove ball bearing.

Both have the principal diameters:

25x52 mm

but their construction is different.

SKF YAT 205 features:

• 27.2 mm overall width,
• inner ring extended on one side,
• two grub screws,
• spherical outside surface,
• construction intended for use in a suitable bearing housing.

A conventional SKF 6205 has different geometry and a different mounting arrangement.

SKF 6205 is not a direct replacement for SKF YAT 205 simply because both products have 25x52 mm principal diameters.

SKF YAT 205 vs SKF YET 205

SKF YAT 205 and SKF YET 205 are both insert bearings, but they differ significantly in their construction and shaft locking method.

SKF YAT 205:

• 25 mm bore
• 52 mm outside diameter
• 27.2 mm overall width
• inner ring extended on one side
• locking by two grub screws

SKF YET 205:

• 25 mm bore
• 52 mm outside diameter
• different overall width and inner ring geometry
• locking by eccentric locking collar

Although both have the same principal 25x52 mm diameters, they are not identical bearing designs.

The locking arrangement, complete geometry and compatibility with the existing bearing unit should be verified before substitution.

SKF YAT 205 vs SKF YAR 205-2F

SKF YAT 205 and SKF YAR 205-2F both have a 25 mm bore and 52 mm outside diameter, but they are not identical variants.

SKF YAT 205 has an overall width of:

27.2 mm

YAR 205-2F has different inner ring geometry and a different overall width.

Replacement selection should therefore not be based solely on the 25x52 mm dimensions.

The complete SKF designation and bearing construction are technically important.

SKF YAT 205 vs SKF YAT 205-100

These two references should not be confused.

SKF YAT 205 has a bore of:

25 mm

In contrast:

SKF YAT 205-100

is an inch-size version with a bore of:

1 inch, or 25.4 mm

The 0.4 mm difference is significant for correct shaft mounting.

SKF YAT 205 and YAT 205-100 should therefore not be treated as the same product.

Alternative Designations and Search References

Natural reference variations include:

SKF YAT 205

YAT 205 SKF

YAT205 SKF

SKF YAT205

YAT 205 25x52x27.2

SKF YAT 205 25x52x27.2

SKF YAT 205 insert bearing

SKF YAT 205 bearing insert

SKF YAT 205 set screw bearing

SKF YAT 205 grub screw bearing

SKF YAT 205 25 mm

Do not confuse this bearing with:

SKF YAT 205-100

because YAT 205-100 has a 25.4 mm bore.

SKF YAT 205 should also not be considered identical to YET 205 or YAR 205-2F solely because they share the same 25x52 mm principal diameters.

How to Select a Replacement for SKF YAT 205

Before using another insert bearing, verify:

• complete bearing designation,
• bore diameter d = 25 mm,
• outside diameter D = 52 mm,
• overall width B = 27.2 mm,
• outer ring width C = 15 mm,
• spherical outside surface,
• inner ring extended on one side,
• shaft locking by two grub screws,
• sealing arrangement,
• relubrication capability,
• required load ratings,
• required rotational speed,
• shaft diameter and tolerance,
• compatibility with the existing housing.

Identical principal dimensions do not automatically mean complete technical interchangeability.

Typical Application of the YAT Design

SKF YAT 205 is an insert bearing designed for use as part of a complete bearing unit with a suitable housing.

This type of construction is intended for applications requiring:

• convenient shaft location,
• locking by grub screws,
• operation in a housing with a suitable spherical seating,
• accommodation of initial mounting misalignment,
• sealed bearing construction,
• relubrication capability.

Selection of the complete bearing unit should consider required loads, speed, environmental conditions, shaft diameter and tolerance, and SKF technical requirements.

SKF YAT 205 Installation

Before installation:

• clean the shaft, bearing and housing,
• verify the shaft diameter,
• verify shaft tolerance,
• inspect the shaft surface,
• make sure the housing is compatible with the insert bearing,
• position the bearing correctly,
• tighten the grub screws correctly,
• follow the specified tightening torque,
• protect the seals against damage,
• avoid transmitting inappropriate mounting forces through the rolling elements.

For the SKF YAT 205 grub screws, the specified tightening torque is:

4 Nm

The specified hexagonal key size is:

3 mm

Until installation, the bearing should preferably remain in its original packaging and be stored in a clean, dry environment.

FAQ

What are the dimensions of SKF YAT 205?

SKF YAT 205 has principal dimensions of 25x52x27.2 mm. The bore diameter is 25 mm, outside diameter is 52 mm and overall width B is 27.2 mm. The outer ring width C is 15 mm.

What type of bearing is SKF YAT 205?

SKF YAT 205 is a single-row ball insert bearing with a spherical outside surface, designed for installation in a suitable bearing housing.

How is SKF YAT 205 secured to the shaft?

SKF YAT 205 is secured using two grub screws located in the inner ring extension.

What grub screws are used in SKF YAT 205?

The specified grub screw thread is M6x0.75. SKF specifies a 3 mm hexagonal key and a recommended tightening torque of 4 Nm.

Are SKF YAT 205 and SKF 6205 interchangeable?

No. Although both have 25x52 mm principal diameters, their construction is different. YAT 205 is an insert bearing with a spherical outside surface, extended inner ring and grub screw shaft locking.

Are SKF YAT 205 and SKF YET 205 the same bearing?

No. YAT 205 uses two grub screws for shaft locking, while YET 205 uses an eccentric locking collar. Their complete geometry is also different.

What are the load ratings of SKF YAT 205?

SKF specifies a basic dynamic load rating C = 14 kN, basic static load rating C0 = 7.8 kN, and fatigue load limit Pu = 0.335 kN.

What is the limiting speed of SKF YAT 205?

SKF specifies a limiting speed of 7000 r/min.

SKF YAT 205 - Quick Answer

SKF YAT 205 is a single-row ball insert bearing measuring 25x52x27.2 mm, with a spherical outside surface and an inner ring extended on one side. It is secured to the shaft by two grub screws. SKF specifies C = 14 kN, C0 = 7.8 kN, Pu = 0.335 kN and a limiting speed of 7000 r/min.

Available from simmering.pl, a specialist B2B supplier of bearings and technical sealing solutions for industry, maintenance departments and technical service companies. Stock in Poland with worldwide shipping.