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770133 - Hobart Grade R Oxy-Acetylene Twin Hose - 1/4 Inch x 50 Feet

Packaging: 1 per ea
$224.43/ea $157.10/1 per ea only $157.10/eaSave 30%

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SKU: MIL770133 Categories: ,

OVERVIEW

Industrial Grade R Oxy-Acetylene Hose for Professional Fabrication

The Hobart 770133 is a premium Grade R Twin Welding Hose designed to meet the rigorous demands of industrial metalworking environments. Engineered specifically for use with Oxy-Acetylene gas setups, this hose ensures the safe and efficient delivery of fuel and oxidizer to your cutting torch or welding handle. In professional settings where safety compliance is paramount, utilizing the correct grade of hose for your specific fuel gas is critical; Grade R is the industry standard for acetylene gas service, featuring a rubber composition that resists the specific chemical properties of acetylene while maintaining structural integrity.

With a generous 50-foot length, this hose assembly provides exceptional reach, allowing operators to move freely around large workpieces or across the shop floor without the need to constantly reposition heavy cylinder carts. The hose features a 1/4-inch inner diameter (ID), which is the optimal size for maintaining consistent pressure and flow rates for medium-to-heavy duty cutting and welding applications. The exterior is color-coded for instant visual identification—Green for Oxygen and Red for Acetylene—reducing the risk of cross-connection errors during setup.

Durability is a key focus of the Hobart 770133. The rubber construction is formulated to resist kinking, abrasion, and general wear-and-tear associated with shop floors. It comes pre-assembled with high-quality brass "B" size fittings (9/16"-18 threads), which are the standard connection type for the vast majority of industrial regulators and torches in North America. These fittings are professionally crimped to ensure leak-proof performance and safety. Whether you are outfitting a new fabrication station or replacing aged and cracked lines, this Hobart hose delivers the reliability required for precision thermal joining and severing operations.

Key Technical Specifications

  • Gas Service: Oxygen and Acetylene (Grade R)
  • Dimensions: 1/4" ID x 50' Length
  • Connections: Standard "B" Fittings (9/16" - 18)
  • Construction: Twin line, bonded rubber
Additional Information
Diameter (in):1/4" (1-4)
Item:Twin Hose (twin-hose)
Length :50ft (50ft)
Used for:Acetylene Only (acetylene-only)
Grade:R
Material:Rubber
Color:Green (Oxygen), Red (Acetylene)
Connection Type:Threaded
----- new values below ----
Grade:R
Fittings:B-Size (9/16" - 18)
Material:Rubber
Color:Green (Oxygen), Red (Acetylene)
Connection Type:Threaded
Brand:Hobart
Diameter (in):1/4" (1-4)
Item:Twin Hose (twin-hose)
Length:50ft (50ft)
Used for:Acetylene Only (acetylene-only)

INCLUDED

  • 1 x 50 ft. Grade R Twin Welding Hose (1/4 in. ID)
  • Pre-installed "B" Size Brass Fittings (Oxygen & Acetylene)

APPLICATIONS

  • Oxy-Acetylene Welding
  • Oxy-Acetylene Cutting
  • Brazing and Heating
  • Automotive Repair Shops
  • Farm and Agricultural Maintenance
  • General Metal Fabrication
  • Structural Steel Work

FAQ

Grade R hose is designed specifically for use with Acetylene gas only. Grade T hose is designed for use with all fuel gases, including Propane, Natural Gas, and Acetylene. You should not use Propane with this Grade R hose as it can deteriorate the rubber lining.

This hose comes with standard "B" size fittings, which have 9/16"-18 threads. This is the most common fitting size for welding regulators and torches.

No. This is a Grade R hose intended for Acetylene. For Propane service, you must use a Grade T hose to prevent the fuel gas from degrading the hose material.

This specific product (Hobart 770133) has a 1/4-inch inner diameter (ID), which allows for higher gas flow compared to 3/16-inch hoses.

Yes, the hose comes pre-assembled with brass fittings on both ends for immediate connection to your regulators and torch.

The hose is color-coded for safety. The Green line is for Oxygen, and the Red line is for the fuel gas (Acetylene). The fittings are also threaded differently (Oxygen is right-hand, Acetylene is left-hand) to prevent cross-connection.

While specific burst pressure can vary, standard welding hoses are typically rated for a working pressure of 200 PSI, which is well above standard oxy-acetylene operating pressures.