Bar Bending Machine

The Spartan SBM 42, SBM 52V, and SBM 55V Bar Bending Machines are heavy-duty mechanized solutions designed for fast, safe, and reliable rebar bending across civil, high-rise, infrastructure, and piling projects. Built for demanding site conditions, the range supports high-tensile TMT and EQR steel processing with advanced controls, robust construction, and productivity-focused performance.

OVERVIEW

Product Overview

The Spartan SBM 42, SBM 52V, and SBM 55V Bar Bending Machines are heavy-duty mechanized rebar bending solutions designed for civil, high-rise, infrastructure, piling, and major construction projects. Engineered to replace unsafe and labor-intensive manual bending, the range delivers faster, safer, and more consistent steel processing across different rebar capacities and project requirements. Developed on the basis of thorough Finite Element Analysis (FEA) studies, the machines feature rugged structural frames engineered to withstand high static and dynamic bending loads. Advanced planetary gearboxes, powerful motors, and smart PLC-based controls help improve bending accuracy, increase productivity, and support high-speed rebar processing while reducing operator effort. Across the range, Spartan combines heavy-duty chassis construction, automated angle control, efficient power transmission, and multiple safety provisions to help contractors improve site productivity, reduce manual handling, and achieve reliable bending performance. From the versatile SBM 42 to the higher-capacity SBM 52V and flagship SBM 55V, the series is designed to meet demanding rebar processing needs, including high-tensile TMT and EQR steel applications.

FEATURES

Key Features

01. Advanced Control & Intelligent PLC Panel

Smart PLC Control & Angle Programming

The advanced PLC system allows operators to pre-set up to three bending angles in one setting, helping improve processing speed, consistency, and daily productivity. Built-in rotation limits also restrict wheel movement beyond 330° for added operational safety.

High-Efficiency Power Transmission

A 97% efficient planetary gearbox transfers motor power smoothly to the bending table, reducing friction, load inertia, and gearbox jerks while delivering high bending torque. The IE2 energy-efficient motor further supports lower power consumption and reliable heavy-duty operation.

Low-Maintenance & Durable Construction

Premium synthetic lubrication eliminates periodic gear oil changes, while hard chrome-plated pins, bushes, rollers, and knobs provide improved wear, scratch, and corrosion resistance. Robust frame geometry supports demanding rebar bending loads.

Enhanced Safety & Site Reliability

Protective top covers help shield bending components and limit switches from metal dust and debris, while dual Tele-mechanique metal roller limit switches support consistent bends. The electrical panel is LV-HV tested in accordance with IEC/EN 60204-1:2006 for reliable performance under voltage fluctuations.

02. Heavy-Duty Powertrain & Gearbox Efficiency

Heavy-Duty Structural Design

The SBM range features reinforced body frame geometry with increased vertical and horizontal structural members, engineered to withstand high static and dynamic loads during demanding rebar bending operations.

Smart Siemens PLC Bending Control

Advanced PLC-based controls with 3-bending pre-selection allow operators to preset multiple bending angles, helping achieve faster, more consistent operation while built-in wheel safety logic prevents over-travel and protects both the machine and operator.

High-Efficiency Powertrain

A 97% efficient planetary gearbox delivers high bending torque with smooth power transmission and zero gearbox jerks, supporting reliable performance in heavy-duty bending applications.

Long-Life Components & Low Maintenance

Hard chrome-plated pins, bushes, rollers, and locking knobs improve wear and corrosion resistance, while protected bend-wheel assemblies and advanced synthetic/grease lubrication help reduce dust ingress, lubricant leakage, and routine maintenance requirements.

SPECIFICATIONS

Technical Specifications

Feature / Attribute	SBM 42	SBM 52V	SBM 55V
Machine Dimensions (L x W x H)	945 x 760 x 960 mm	—	1215 x 935 x 1085 mm
Overall Weight	325 Kg	—	550 Kg
Motor Capacity	5 HP	5.4 HP IE2 Energy-Efficient Motor	7.5 HP
Bend Wheel Speed	9.4 rpm	—	6.0 rpm
Bend Wheel Diameter	300 mm	—	Ø500 mm
Maximum Bending Radius	Up to 4D of Ø32 mm TMT Bar	—	6D of Ø36 mm / 5D of Ø40 mm TMT Bar (Optional: 8D of Ø40 mm)
Bending Bushes Supplied	Ø60, Ø70, Ø100, Ø120 mm	—	Ø60, Ø70, Ø100, Ø120, Ø160, Ø220 & Ø320 (Optional)
Bending Control System	Advanced PLC Panel & 3 Bending Selector Switch	Siemens PLC with 3-Bending Pre-selection Switch	—
Gearbox Design	Grease-Lubricated Gearbox	Advanced Planetary Gearbox	—
Transmission Efficiency	—	97% Input Energy Transmission	—
Lubrication	Grease-Lubricated Gearbox & Lifetime Synthetic Oil	Premium Synthetic Grease	—
Electrical Limit Switches	—	Tele-mechanique with highly durable metal rollers	—
Chassis Build & Finishing	—	Galvanized Iron (GI) Sheets with 7-Tank PP Powder Coating	—
Core Safety Features	—	Dual Emergency Stops, Audio Return Buzzer, Bush Keeper Plate	—
Bending Component Finish	—	Hard Chrome Plating on all Pins, Bushes, and Rollers	—
Electrical Safety Standards	—	—	IEC / EN 60204-1:2006 Certified
Manufacturing Quality Standards	—	—	ISO 9001:2015, ISO 14001:2015, OHSAS 18001:2007

PERFORMANCE

Cutting Performance

Rebar Diameter (mm)	Tensile Strength: 41–50 kg/mm² (Elongation Max 12%)	Tensile Strength: 51–60 kg/mm² (Elongation Max 16%)	Tensile Strength: 61–70 kg/mm² (Elongation Max 14.5% / 10% Max)	Tensile Strength: 71–78 kg/mm² / EQR (Elongation Max 18%)
40 mm	1 Bar	1 Bar	1 Bar	1 Bar
36 mm	1 Bar	1 Bar	1 Bar	1 Bar
32 mm	1 Bar	1 Bar	1 Bar	1 Bar
25 mm	2 Bars	2 Bars	2 Bars	2 Bars
20 mm	2 Bars	2 Bars	2 Bars	2 Bars
16 mm	3 Bars	3 Bars	3 Bars	3 Bars
12 mm	5 Bars	5 Bars	5 Bars	5 Bars
10 mm	7 Bars	7 Bars	6 Bars	6 Bars
8 mm	8 Bars	8 Bars	8 Bars	8 Bars

Common Questions About Bar Bending Machine

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What is the maximum rebar bending capacity of the Spartan SBM 55V?

The SBM 55V is Spartan's heavy-duty flagship rebar bender. It has a rated maximum bending capacity of 40 mm diameter for high-strength EQR (Earthquake Resistant) TMT steel bars (at 5D bending radius, and up to 8D with optional bushes) with tensile strengths up to 78 kg/mm². For smaller bar diameters, the machine can comfortably bend multiple bars simultaneously (e.g., up to 2 bars of 25 mm, 3 bars of 16 mm, 5 bars of 12 mm, or 8 bars of 8 mm at a time) to dramatically accelerate site productivity.

How does the advanced PLC and pre-selection switch increase operational speed?

Unlike traditional benders that require the operator to physically stop work and manually shift locator pins to adjust the angle for each bend, the SBM 55V uses a 3-Bending Pre-selection Switch combined with an Advanced PLC Panel. This allows operators to pre-set three distinct bending angles and radii in a single session. Operators can instantly execute three different degree bends on a single rebar using a simple selector switch, making bending operations two times faster.

What safety and durability features protect the SBM 55V on harsh sites?

The SBM 55V is constructed with several high-performance protective features: Bend Wheel and Limit Switch Cover: A robust top shield blocks concrete, dust, and steel shavings from getting into the bend wheel and limits, while allowing easy brush cleaning. Hard Chrome Plating: Critical high-friction parts like pins, bushes, rollers, and lock knobs are hard chrome plated to prevent surface scratches and rust. Improved Chassis Frame: Built with significantly larger vertical and horizontal members to absorb heavy static and dynamic dynamic loads. Over-travel Logic: Software programmed in the PLC restricts rotation of the bend wheel past 330 degrees to prevent structural overload.

What are the gearbox maintenance requirements for the SBM 55V?

Maintenance is virtually non-existent. SBM 55V is engineered with an advanced Grease-Lubricated Gearbox that eliminates the high oil-leakage risks of traditional gearboxes, meaning you never have to worry about messy leaks or checking fluid levels. Furthermore, the machine utilizes high-viscosity Synthetic Oil featuring a lifetime warranty. This synthetic lubrication completely eliminates the need for periodic gear oil changes, maintaining performance at both low and high site temperatures without forming oil sludge or experiencing thermal breakdown.

How does SBM 55V prevent electrical motor failure during voltage drops on-site?

The SBM 55V is fitted with an integrated Siemens DOL Starter paired with a highly responsive Voltage Protection Relay (VPR). This system constantly monitors the quality of the electric supply. It automatically cuts off power to protect the powerful 7.5 HP motor from burning out in the event of single phasing, voltage fluctuations (high/low voltage), or motor overloading. Additionally, the panel is fully safety-tested and certified to meet the IEC/EN 60204-1:2006 standard.