The Emerson (Browning) 1VP56X 1-1/8 is a single-groove variable pitch sheave designed for adjustable belt-drive applications.  Constructed from machined cast iron, this VP Series sheave features a 5.35" outside diameter and a 1-1/8" finished bore with keyway for direct mounting to a compatible shaft.  It is designed for use with 3L, 4L, 5L, A, and B section belts, making it suitable for a wide range of HVAC, air-handling, fan, blower, pump, and industrial power-transmission applications.

The variable-pitch design allows the effective pitch diameter to be adjusted to help change the drive ratio and operating speed of connected equipment.  Depending on the belt section used, the sheave supports a pitch diameter range of approximately 3.9 to 4.7 inches for 3L belts, 4.0 to 5.0 inches for 4L and A belts, and 4.3 to 5.3 inches for 5L and B belts.  This adjustability provides a practical way to fine-tune system performance without replacing the complete sheave.

The Browning 1VP56X combines durable cast iron construction, a finished keyed bore, and single-groove configuration for dependable use in adjustable-speed belt-drive systems. Its compatibility with multiple common V-belt sections provides installation flexibility, while the finished-bore design eliminates the need for a separate mounting bushing. 

The 1VP56X11/8 directly replaces part number PennBarry 62817-0.
 

Frequently Asked Questions

• What is the Emerson (Browning) 1VP56X 1-1/8 used for?

The 1VP56X 1-1/8 is a variable pitch sheave used in adjustable belt-drive systems. It is commonly used with HVAC equipment, fans, blowers, pumps, and other industrial power-transmission applications where operating speed may need to be adjusted.

• What is the bore size of the Browning 1VP56X?

This model has a 1-1/8-inch finished bore with a keyway for mounting directly to a compatible shaft.

• What is the outside diameter of this sheave?

The Browning 1VP56X has a 5.35-inch outside diameter.

• How many grooves does the 1VP56X have?

This model has a single-groove design for use with one compatible V-belt.

• What belt sizes are compatible with the 1VP56X?

The sheave is compatible with 3L, 4L, 5L, A, and B section V-belts.

• What is the pitch diameter range?

The approximate pitch diameter range is 3.9 to 4.7 inches for 3L belts, 4.0 to 5.0 inches for 4L and A belts, and 4.3 to 5.3 inches for 5L and B belts.

• What does variable pitch mean?

Variable pitch means the effective operating diameter of the sheave can be adjusted. This allows the drive ratio and equipment operating speed to be changed without replacing the complete sheave.

• Does this sheave require a separate bushing?

No. This version has a finished 1-1/8-inch bore, so it is designed to mount directly to a properly sized keyed shaft.

• What material is the Browning 1VP56X made from?

The sheave is constructed from cast iron for durable mechanical power-transmission use.

• Is the 1VP56X suitable for HVAC applications?

Yes. It can be used in compatible HVAC and air-handling systems, including fans and blowers that use adjustable V-belt drives.