MAGNETIC BACKUP WRENCHES.
HANDS-FREE NUT ROTATION STOPPERS.
The BW-series magnetic backup wrench is the simplest, safest, and most versatile way to stop nut rotation during heavy torquing or loosening operations. Engineered with a ultra-thin profile, heat-treated high-strength material, and embedded magnets, it eliminates hand and finger injuries while completely replacing dangerous slugging or striking spanners.
BOLTORQ BW-SERIES COMPACT & MEDIUM MAGNETIC BACKUP WRENCHES
Thin-profile bi-hexagonal backup wrenches designed for standard pipe flanges, pressure vessels, and narrow clearance stud gaps.
BOLTORQ BW-SERIES HEAVY-DUTY MAGNETIC BACKUP WRENCHES
Heavy-duty heat-treated backup wrenches engineered to withstand extreme reaction loads up to 37,962 Nm during heavy industrial bolting.
| Model | Across Flat (mm) | Across Flat (in) | Load Limits (ft.lbs) | Load Limits (Nm) | Hand Safety |
| BW104 | 30 | 1-1/4″ | 2,400 | 3,254 | Hands-Free |
| BW107 | 36 | 1-7/16″ | 2,500 | 3,390 | Hands-Free |
| BW110 | 41 | 1-5/8″ | 3,500 | 4,745 | Hands-Free |
| BW113 | 46 | 1-13/16″ | 3,500 | 4,745 | Hands-Free |
| BW200 | 50 | 2″ | 4,100 | 5,559 (559) | Hands-Free |
| BW203 | 55 | 2-3/16″ | 4,200 | 5,694 | Hands-Free |
| BW204 | 57 | 2-1/4″ | 4,300 | 5,830 | Hands-Free |
| BW206 | 60 | 2-3/8″ | 4,300 | 5,830 | Hands-Free |
| BW209 | 65 | 2-9/16″ | 4,500 | 6,169 | Hands-Free |
| BW212 | 70 | 2-3/4″ | 5,600 | 7,592 | Hands-Free |
| BW218 | 75 | 2-15/16″ | 6,300 | 8,542 | Hands-Free |
| BW302 | 80 | 3-1/8″ | 7,000 | 9,491 | Hands-Free |
| BW308 | 85 | 3-1/2″ | 7,200 | 9,762 | Hands-Free |
| BW311 | 90 | 3-11/16″ | 7,300 | 9,897 | Hands-Free |
| BW314 | 95 | 3-7/8″ | 9,000 | 12,202 | Hands-Free |
| BW400 | 100 | 4″ | 24,000 | 32,539 | Hands-Free |
| BW402 | 105 | 4-1/8″ | 24,000 | 32,539 | Hands-Free |
| BW404 | 110 | 4-1/4″ | 24,000 | 32,539 | Hands-Free |
| BW408 | 115 | 4-1/2″ | 25,000 | 33,895 | Hands-Free |
| BW410 | 120 | 4-5/8″ | 27,000 | 36,607 | Hands-Free |
| BW500 | 130 | 5″ | 27,000 | 36,607 | Hands-Free |
| BW506 | 135 | 5-3/8″ | 27,000 | 36,607 | Hands-Free |
| BW512 | 145 | 5-3/4″ | 28,000 | 37,962 | Hands-Free |
ENGINEERED FOR HANDS-FREE OPERATION AND ZERO PINCH POINTS.
Boltorq BW-series magnetic backup wrenches are designed to overcome all major safety and operational drawbacks associated with conventional backing spanners:
Embedded High-Strength Magnets and Fall Protection Tie-Offs
Creates a magnetic field and attractive force that securely locks onto ferromagnetic materials, allowing 100% hands-free tool positioning. Lighter and easier to carry than conventional backup spanners, available with integrated tie-offs and tethers for scaffold and high-elevation safety.
Bi-Hexagonal Profile Design
Provides the ultimate mixture of versatility, positioning ease, and long-term mechanical durability.
Pinch Point & Injury Elimination
Operates purely mechanically without hydraulics, completely eliminating hand and finger pinch injuries during high-torque operations.
Spark-Free Operational Safety
Eliminates dangerous sparks caused by striking or slugging wrenches in hazardous environments.
ESSENTIAL BACKUP TOOLS FOR HEAVY MANUFACTURING & FIELD WORK.
Boltorq BW-series magnetic backup wrenches deliver critical anti-rotation support across high-risk industrial plant turnarounds, petrochemical facilities, and offshore sites. By securing nuts mechanically and eliminating manual backing spanners, our tools reduce operational cycle times, enhance site safety compliance, and boost total workforce productivity.
Refinery & Petrochemical Maintenance
Stopping nut rotation on heat exchanger studs, valve bonnets, and high-pressure pipe flanges without spark hazards.
Structural & PEB Erection
Safely backing nuts on high-elevation steel building joints and bridge girders with integrated fall-protection tethers.
Power Generation & Heavy Machinery
Providing reliable counter-torque hold up to 37,962 Nm during heavy turbine casing and foundation bolting.
FREQUENTLY ASKED QUESTIONS ABOUT
BW MAGNETIC BACKUP WRENCHES
How does a magnetic backup wrench stop nut rotation without hydraulics?
When torquing or loosening nuts, the thin profile of the BW backup wrench rests against the adjacent nut or flange body, mechanically preventing the nut on the opposite side of the stud from turning—requiring no hydraulics.
What size range is available for the Boltorq BW magnetic backup series?
The BW-series is available in standard metric sizes from M30 to M145 (30 mm to 145 mm) and imperial sizes from 1-1/4″ to 5-3/4″.
How do BW backup wrenches improve operator safety on site?
They are completely hands-free due to embedded magnets, eliminating hand and finger pinch point injuries and eliminating dangerous sparks caused by striking/slugging wrenches.
How can I order or request custom nut sizes for our site operations?
Email our commercial desk directly at sales@boltorq.com or info@boltorq.com, or call +91 98927 03895.
How do embedded magnets enable 100% hands-free operation on pipe flanges?
Embedded rare-earth magnets generate a strong magnetic attraction that locks the thin-profile wrench firmly against adjacent steel nuts or flange faces. This keeps the tool rigidly in place during hydraulic or electric torquing, allowing operators to keep their hands completely clear of dangerous pinch zones.
What nut across-flat (AF) sizes and reaction load capacities are supported?
The BW series spans metric nut sizes from 30 mm up to 145 mm (1-1/4″ to 5-3/4″), supporting reaction counter-torques from 3,254 Nm on the compact BW104 up to 37,962 Nm (28,000 ft.lbs) on the heavy-duty BW512.
What safety features prevent tool dropping during high-elevation work?
Every Boltorq BW backup wrench is manufactured with dedicated fall-protection tie-off points and lanyard tether loops, allowing technicians working on scaffolding or wind towers to tie the tool off safely.
Why is a bi-hexagonal profile preferred over a standard 6-point hex profile?
The bi-hexagonal (12-point) internal geometry doubles the indexing positioning angles available to the technician, making it significantly easier to slide the backup wrench over nuts in tight clearance gaps where adjacent pipe flanges limit movement.
UPGRADE YOUR BOLTING CREW WITH
HANDS-FREE SAFETY BACKUP WRENCHES.
Email sales@boltorq.com or info@boltorq.com to specify your required metric (M30–M145) or imperial (1-1/4″–5-3/4″) nut sizes today.