Semi-automatic pipe threading machine 792ALX

Summary
The Oster 792ALX pipe and bolt threading machine is a heavy‑duty, high‑production threading unit designed for industrial pipe and bolt applications. It is available in three bed lengths to accommodate a wide range of part lengths and production workflows.

• Three bed lengths: standard (7.5 in / 7-3/4 in stroke), long (15 in), extra long (25 in).
• Produces Class 2A bolt threads from 1/4 in to 2-1/4 in (6 mm–57 mm) and NPT pipe threads from 1/8 in to 2 in (3 mm–51 mm nominal).
• Variable spindle speeds: 20–210 RPM.

Threading Capacities & General Specifications
Bolt threading capacity: 1/4 in to 2-1/4 in (6 mm–57 mm)
Pipe threading capacity (NPT nominal): 1/8 in to 2 in (3 mm–51 mm nominal)
Variable spindle speed range: 20–210 RPM
Maximum thread length (no re-grip): varies by bed length
Standard bed length: 7.5 in (7-3/4 in)
Long bed length: 15 in
Extra long bed length: 25 in
Net weight: 900 lbs (approx. 408 kg)
Shipping weight: 1040 lbs (approx. 472 kg)

Features
The Oster 792ALX is engineered for continuous production and repeatability.

• Self-Centering Quick-Action Vise Carriage
  • Open-type vise with hardened alloy steel jaws for 1/2 in to 2 in and auxiliary jaws for diameters under 1/2 in.
  • Smooth-action vise for easy loading, positive gripping and automatic centering.
  • Adjustable stock rest for simplified loading and unloading.
• Adjustable Diehead Threading Stop
  • Quick-setting stop automatically opens the diehead at the set thread length for accurate, repeatable cuts.
• In-Spindle Ream & Chamfer Tool (optional)
  • Optional #02871 tool reams and chamfers freshly cut pipe threads in a single setup; can be configured for solid bar chamfering.
• Three Bed Lengths Available
  • Standard – Max thread length: 7-3/4 in
  • Long – Max thread length: 15 in
  • Extra Long – Max thread length: 25 in

Production Speed Studies – Pipe Threading (pieces per hour)
Pipe Size | Pieces per hour
1/2 in x 6 in lg. | 211
1/2 in x 2 ft lg. | 211
1/2 in x 10 ft lg. | 163
1 in x 6 in lg. | 175
1 in x 2 ft lg. | 180
1 in x 10 ft lg. | 124
2 in x 6 in lg. | 138
2 in x 2 ft lg. | 138
2 in x 10 ft lg. | 91

Production Speed Studies – Bolt Threading (pieces per hour)
Bolt Diameter | Pieces per hour
1/4 in | 220
3/8 in | 250
1/2 in | 215
5/8 in | 180
3/4 in | 187
7/8 in | 150
1 in | 157
1-1/8 in | 150
1-1/4 in | 150
1-3/8 in | 145
1-1/2 in | 130

Advantages

• Cost-efficient alternative to CNC machining for high volumes.
• No need for a skilled operator for standard repetitive operations.
• Interchangeable for pipe and bolt threading with reliable accuracy for critical applications.
• Semi-automatic operation for production environments.
• Manufactured in the USA.

Niche Applications

• Anchor bolts
• Cement anchors for construction
• Pipe systems such as fire sprinklers and natural gas distribution
• Specialized uses (e.g., gas truck fittings)
• Hanger bolts for naval and submarine applications
• Snowblower components

Rotating X1 Diehead – Notes
The Oster X1 rotating diehead increases throughput by eliminating spindle start/stop between pieces, improves safety on long work, and can cut right- and left-hand threads in a single pass. It can produce approximately 200 threaded ends per hour.

Thread Cutting Oil
Oster OSTO dark thread cutting oil extends die life, prevents chip welding and tool wear, and is formulated for stable shelf life.

Demonstration Videos
Product demonstrations available: threading and end finishing with #02871 Ream & Chamfer tool; basic bolt operation; 792A machine overview.

Technical Specifications

• Bolt threading capacity: 1/4 in to 2-1/4 in (6 mm–57 mm)
• Pipe threading capacity (NPT nominal): 1/8 in to 2 in (3 mm–51 mm nominal)
• Variable spindle speed range: 20–210 RPM
• Bed lengths (max thread lengths): Standard 7.5 in (7-3/4 in), Long 15 in, Extra Long 25 in
• Maximum thread length (no re-grip): varies by bed length
• Net weight: 900 lbs (approx. 408 kg)
• Shipping weight: 1040 lbs (approx. 472 kg)
• Optional in-spindle #02871 Ream & Chamfer tool for pipe threads and solid bar chamfering
• Self-centering quick-action vise carriage with hardened alloy steel jaws and auxiliary jaws for <1/2 in diameters
• Adjustable diehead threading stop for repeatable thread lengths