Numerical Control Single-Head Pipe Bending Machine

Overview of the GM-SB-76 CNC Single-Head Pipe Bender

The GM-SB-76CNC-2A-1S is a numerical control single-head pipe bending machine built for commercial users in industrial pipe fabrication, structural tube processing, and batch component manufacturing. Manufactured by GMACC in an ISO 9001-certified facility, the machine integrates mechanical, hydraulic, and electrical systems with Mitsubishi servo drives and PLC control. It processes mild steel round tube up to Ø76×4mm, stainless steel up to Ø76×3mm, and light alloy annealed tube up to Ø76×6mm, with a 4,000mm through-feed distance for long production runs.

Key Features of the GM-SB-76 CNC Single-Head Pipe Bender

CNC Control with Multi-Bend Programming

An industrial computer controls the X (feeding), Z (rotation), and bending axes, allowing operators to input and store multi-bend programs via a Weinview touch screen panel. The system supports automatic mandrel on/off switching, spring-back compensation, error self-diagnosis with alarm, and parameter memory retention after power-off. Bending angle precision is ±0.10°, with rotation precision of ±0.10° and feeding precision of ±0.10mm.

Hydraulic Bending System

A 7.5 kW system motor powers a 23L hydraulic pump operating at up to 16 MPa. Maximum bending speed is 30°/sec and the maximum bending angle is 190°. Clamping stroke is adjustable from 0 to 136mm, and the pressure die stroke is 300mm, providing stable clamping force for a range of tube profiles.

Servo Feeding and Rotation

Both the feeding axis (X) and rotation axis (Z) use 1.5 kW Mitsubishi servo motors, with maximum feeding speed of 800mm/sec and maximum rotation speed of 160°/sec. This configuration supports repeatable multi-bend sequences for enterprise customers running batch production.

Technical Specifications of the GM-SB-76 Single-Head Pipe Bender

Component Configuration of the GM-SB-76 Single-Head Pipe Bender

Industrial Applications of the GM-SB-76 CNC Single-Head Pipe Bender

This machine serves enterprise customers in pipe fabrication shops, structural steel workshops, HVAC ducting production, agricultural equipment manufacturing, and general metalworking. It handles round, square, and rectangular mild steel tube, stainless steel tube, light alloy annealed tube, and solid round or square bar. The 4,000mm through-feed distance and 190° maximum bending angle support long workpieces with multiple bends in a single setup, reducing material handling for batch production.

Tooling Samples

Bending Die	Clamp Die	Pressure Die
Mandrel		Wiper Die (optional)

FAQ About the GM-SB-76 Single-Head Pipe Bender

What tolerances can this machine achieve on production bends?

The machine achieves ±0.10° bending angle precision, ±0.10° rotation angle precision on the Z axis, and ±0.10mm shifting precision on the X feeding axis, as measured under standard operating conditions.

What tooling is included and what is available as an option?

Standard tooling includes a bending die, clamp die, and pressure die matched to the buyer's tube diameter. A mandrel and wiper die are available as optional items for thin-wall tube bending applications requiring reduced ovality and wrinkling.

What are the delivery, payment, and warranty terms?

The minimum order quantity is one piece. Standard packaging is an iron frame or wooden case, shipped from Shanghai, China. Accepted payment terms include L/C and T/T. Buyers should contact the supplier for current lead time and warranty coverage details specific to their configuration.