Through-hole (washer-type) load cell measuring the axial force of high-strength bolts installed between nut and clamped plates.
Overview
This is an annular (thru-hole, washer-type) strain-gauge compression load cell machined from a single stainless-steel body. A central bore lets a high-strength bolt pass through; installed between the nut and the clamped part, it directly measures the axial preload (axial force) of hex-head and torshear-type high-strength bolt assemblies during tightening. It outputs a mV/V strain signal which a digital force indicator reads directly. It is widely used in steel-structure construction, bolt torque-coefficient calibration, high-strength bolt testers and automated assembly. The bore size can be customized for M12M30 bolts; it is compact, stable and robust against off-axis loads.
Applications
• Road and highway engineering laboratory testing
• Construction material quality control and acceptance
• Research and teaching laboratories
• Third-party inspection and certification bodies
Features
• Electro-hydraulic loading system with stable test force application
• Robust construction suitable for both laboratory and field use
• Compliant with relevant Chinese and international testing standards
• Complete with calibration certificate and operation manual
Technical Specifications
| Item | Specification |
| Rated capacity | 0.5–200kN (customizable, commonly 200kN) |
| Bore diameter | φ4–16mm customizable (per bolt size) |
| Typical OD/height | φ46×16mm |
| Sensitivity | 1.0±10% mV/V |
| Zero balance | ±2% F.S. |
| Nonlinearity | 0.3% F.S. |
| Hysteresis | 0.1% F.S. |
| Repeatability | 0.1% F.S. |
| Creep (30min) | 0.1% F.S. |
| Temp. drift | span/zero 0.1% F.S./10°C |
| Response frequency | 1kHz |
| Material | stainless steel |
| Excitation | 5–15V DC |
| Insulation resistance | ≥5000MΩ/100V DC |
| Operating temp. | -20 to 80°C (high-temp version to 150°C) |
| Safe overload | 120%; ultimate overload: 150% |
| Cable | Φ5mm × 2m, shielded black |
| Accessory | digital force indicator / logger for direct axial-force reading |
Standards
GB/T 13978, JTG/T J21, ASTM E4
Standard Delivery
• Main instrument unit
• Power cable
• Operation manual
• Calibration certificate
• Spare parts kit
FAQ
Q1: What standards does the Through-Hole Load Cell for High-Strength Bolt Axial Force comply with?
A1: The Through-Hole Load Cell for High-Strength Bolt Axial Force is designed and manufactured in accordance with relevant Chinese national (GB) and transport industry (JTG) standards, as well as applicable ASTM and AASHTO international standards. A calibration certificate traceable to national standards is provided with each unit.
Q2: How often should the Through-Hole Load Cell for High-Strength Bolt Axial Force be calibrated?
A2: We recommend annual calibration by authorized technicians or by iRoad after-sales service center. For high-frequency laboratory use, semi-annual calibration is advised. The instrument is supplied with a factory calibration certificate.
Q3: What is the lead time and do you provide training?
A3: Standard units are usually shipped within 7-15 working days. Custom configurations may require 20-30 days. iRoad provides on-site installation, commissioning and operator training for major equipment; remote video guidance is available for standard laboratory instruments.
Overview
This is an annular (thru-hole, washer-type) strain-gauge compression load cell machined from a single stainless-steel body. A central bore lets a high-strength bolt pass through; installed between the nut and the clamped part, it directly measures the axial preload (axial force) of hex-head and torshear-type high-strength bolt assemblies during tightening. It outputs a mV/V strain signal which a digital force indicator reads directly. It is widely used in steel-structure construction, bolt torque-coefficient calibration, high-strength bolt testers and automated assembly. The bore size can be customized for M12M30 bolts; it is compact, stable and robust against off-axis loads.
Applications
• Road and highway engineering laboratory testing
• Construction material quality control and acceptance
• Research and teaching laboratories
• Third-party inspection and certification bodies
Features
• Electro-hydraulic loading system with stable test force application
• Robust construction suitable for both laboratory and field use
• Compliant with relevant Chinese and international testing standards
• Complete with calibration certificate and operation manual
Technical Specifications
| Item | Specification |
| Rated capacity | 0.5–200kN (customizable, commonly 200kN) |
| Bore diameter | φ4–16mm customizable (per bolt size) |
| Typical OD/height | φ46×16mm |
| Sensitivity | 1.0±10% mV/V |
| Zero balance | ±2% F.S. |
| Nonlinearity | 0.3% F.S. |
| Hysteresis | 0.1% F.S. |
| Repeatability | 0.1% F.S. |
| Creep (30min) | 0.1% F.S. |
| Temp. drift | span/zero 0.1% F.S./10°C |
| Response frequency | 1kHz |
| Material | stainless steel |
| Excitation | 5–15V DC |
| Insulation resistance | ≥5000MΩ/100V DC |
| Operating temp. | -20 to 80°C (high-temp version to 150°C) |
| Safe overload | 120%; ultimate overload: 150% |
| Cable | Φ5mm × 2m, shielded black |
| Accessory | digital force indicator / logger for direct axial-force reading |
Standards
GB/T 13978, JTG/T J21, ASTM E4
Standard Delivery
• Main instrument unit
• Power cable
• Operation manual
• Calibration certificate
• Spare parts kit
FAQ
Q1: What standards does the Through-Hole Load Cell for High-Strength Bolt Axial Force comply with?
A1: The Through-Hole Load Cell for High-Strength Bolt Axial Force is designed and manufactured in accordance with relevant Chinese national (GB) and transport industry (JTG) standards, as well as applicable ASTM and AASHTO international standards. A calibration certificate traceable to national standards is provided with each unit.
Q2: How often should the Through-Hole Load Cell for High-Strength Bolt Axial Force be calibrated?
A2: We recommend annual calibration by authorized technicians or by iRoad after-sales service center. For high-frequency laboratory use, semi-annual calibration is advised. The instrument is supplied with a factory calibration certificate.
Q3: What is the lead time and do you provide training?
A3: Standard units are usually shipped within 7-15 working days. Custom configurations may require 20-30 days. iRoad provides on-site installation, commissioning and operator training for major equipment; remote video guidance is available for standard laboratory instruments.
