AA148 SWR 12.5x10x3812 - Double V-Belt HAA3812

AA148 SWR is a Double V-Belt with an AA profile of 12.5x10 mm and a reference length of 3812 mm, also identified as HAA3812. Unlike a conventional single-sided V-belt, the symmetrical Double V construction allows the belt to transmit power through both sides. This makes AA148 suitable for multi-pulley and serpentine drive arrangements where pulleys engage alternately with the inner and outer working surfaces of the belt.

Technical Specifications - AA148 SWR

Product Type: Double V-Belt / Double-Sided V-Belt
Brand: SWR
Designation: AA148
Alternative Designation: HAA3812
Profile: AA / HAA
Nominal Profile Width: 12.5 mm
Nominal Profile Height: 10 mm
Reference Length: 3812 mm
Nominal Profile: 12.5x10 mm
Profile Angle: 40 degrees
Construction: Double-sided, wrapped
Power Transmission: Both sides of the belt
Application: Multi-pulley drives, agricultural machinery, industrial machinery and power transmission systems

What Is an AA148 SWR Double V-Belt?

The AA148 designation identifies a double-sided V-belt with an AA profile.

Unlike a conventional V-belt, the AA profile has working V-shaped surfaces on both sides. This allows pulleys to engage the belt from opposite sides within the same drive arrangement.

This construction is particularly useful where one belt must drive several pulleys or where individual driven components rotate in different directions.

The corresponding metric designation for this SWR belt is HAA3812.

AA148 and HAA3812 Designations

The belt can be identified using two important designations:

AA148
HAA3812

AA148 is commonly used as the traditional size designation, while HAA3812 provides a metric identification associated with the AA profile and 3812 mm reference length.

For replacement identification, searches may therefore include:

SWR AA148
SWR HAA3812
AA148 Double V-Belt
HAA3812 Double V-Belt
AA148 12.5x10x3812

Checking both designations helps reduce the risk of selecting a conventional single-sided V-belt with a similar length.

Double V-Belt Construction

The defining feature of SWR AA148 is its symmetrical double V construction.

The belt profile allows both sides to operate as power-transmitting surfaces. This type of belt is consequently known under several technical terms:

Double V-Belt
Double-Sided V-Belt
Hexagonal V-Belt
Double Vee Belt
Double-Sided Drive Belt

This geometry enables one belt to follow a more complex path around multiple pulleys than a conventional single-sided V-belt.

AA Profile 12.5x10 mm

The nominal AA profile dimensions are:

Width: 12.5 mm
Height: 10 mm

The AA profile may sometimes be commercially described as approximately 13x10 mm, but the catalog profile identification AA / HAA 12.5x10 mm provides more precise identification for this SWR belt.

Profile dimensions are particularly important because the belt must correctly engage with the corresponding pulley grooves.

HAA3812 Reference Length

The HAA3812 designation identifies the corresponding metric size with a reference length of 3812 mm.

When selecting a replacement belt, length should always be considered together with the profile.

A belt with a similar 3812 mm length but a different cross-section or single-sided construction is not automatically interchangeable with AA148.

Multi-Pulley Drive Applications

Double V-belts are particularly useful in systems where a single belt follows a path around several pulleys.

Depending on the drive design, AA148 SWR may be used in:

• multi-pulley drive systems
• serpentine drive arrangements
• agricultural machinery
• industrial machinery
• material handling equipment
• fan drive systems
• mechanical equipment
• auxiliary drive systems
• machinery requiring opposite pulley rotation

The ability to engage pulleys with both sides of the belt provides greater flexibility when designing complex mechanical drive layouts.

AA148 SWR for Agricultural Machinery

Double V-belts are frequently associated with agricultural machinery containing multiple mechanically driven components.

Depending on the machine design, one belt may transfer power between several shafts while individual pulleys contact opposite sides of the belt.

Typical application areas may include appropriately designed:

• combine harvesters
• harvesting machinery
• agricultural equipment
• fan systems
• conveying mechanisms
• auxiliary agricultural drives

Compatibility should always be confirmed from the original belt designation or the machine manufacturer's technical documentation.

Industrial Power Transmission

AA148 SWR can also be used in industrial power transmission systems specifically designed for double-sided V-belts.

Such systems may use one continuous belt to transmit mechanical power between several shafts while maintaining a compact drive layout.

Important operating parameters include:

• pulley diameter
• pulley groove geometry
• transmitted power
• rotational speed
• belt tension
• shaft alignment
• drive layout
• environmental conditions

Correct installation and pulley alignment are important for achieving reliable belt operation.

AA148 vs Conventional V-Belt

AA148 is not a conventional single-sided V-belt.

A standard V-belt is primarily designed to transmit power through one V-shaped working profile.

A Double V-Belt has two working V profiles, allowing pulleys to engage both sides of the belt.

This distinction is critical when replacing a belt in a serpentine or multi-pulley drive. A conventional V-belt with a similar length should not automatically be used as a substitute.

How to Select an AA148 Replacement

When identifying a replacement for SWR AA148, verify:

Designation: AA148
Alternative Designation: HAA3812
Profile: AA / HAA
Nominal Cross-Section: 12.5x10 mm
Reference Length: 3812 mm
Construction: Double V-Belt
Working Surfaces: Both sides
Pulley Geometry: Compatible with AA profile

Length alone is insufficient for correct belt identification.

The replacement must also have the correct double-sided profile and match the pulley system.

Operational Advantages

Double-sided power transmission: both V-shaped surfaces can engage compatible pulleys.

Multi-pulley capability: suitable for drive layouts involving several driven components.

AA profile: standardized profile designation simplifies replacement identification.

3812 mm reference length: corresponds to the HAA3812 metric designation.

Wrapped construction: supports operation in conventional Double V-Belt drive systems.

Flexible drive layout: enables more complex belt routing than conventional single-sided V-belts.

POPULAR SEARCHES

AA148 SWR

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AA148 12.5x10x3812

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FAQ - AA148 SWR

What is AA148 SWR?
AA148 SWR is a Double V-Belt with an AA profile, designed to transmit power through both sides of the belt in compatible drive systems.

What are the dimensions of SWR AA148?
The nominal profile is 12.5x10 mm, and the reference length is 3812 mm.

Are AA148 and HAA3812 equivalent size designations?
For this SWR belt, AA148 corresponds to the metric designation HAA3812.

Is AA148 a standard single-sided V-belt?
No. AA148 is a double-sided V-belt with two working V-shaped surfaces.

Why can an AA148 belt drive pulleys on both sides?
Its symmetrical Double V profile provides working surfaces on both sides, allowing compatible pulleys to engage either side of the belt.

Is AA148 also called a hexagonal belt?
Yes. Double V-belts are commonly referred to as hexagonal V-belts because of their characteristic cross-sectional geometry.

Can a conventional 3812 mm V-belt replace AA148?
Not automatically. The replacement must also have the correct AA profile and double-sided construction.

Where are AA Double V-belts used?
They are used in compatible multi-pulley drives, agricultural machinery, industrial equipment and other systems requiring power transmission through both sides of a belt.

Frequently Asked Questions by Engineers

What profile does SWR AA148 use?
It uses the AA / HAA profile with nominal dimensions of 12.5x10 mm.

What is the reference length of AA148?
The reference length is 3812 mm.

Why is AA148 sometimes described as 13x10 mm?
Some commercial listings round the nominal width to approximately 13 mm. For precise product identification, the catalog AA / HAA profile specification of 12.5x10 mm should be retained.

Is belt length alone sufficient to select an AA148 replacement?
No. Profile dimensions, Double V construction and length must all be verified.

What should be checked before installing an AA148 belt?
Check pulley groove condition, pulley alignment, drive geometry, belt tension and compatibility with the AA profile.