Self-Undercutting Anchor
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Mechanical Anchors
The self-undercutting anchor is a pre-engineered mechanical anchor system composed of a cutting ring, expansion sleeve, threaded rod, spring washer, flat washer, and nut. Made from chrome-alloy steel, it offers high tensile strength and excellent toughness, making it suitable for heavy-duty structural applications.
Technical Data
Pre-Set Undercut Anchor (Stainless Steel)
| Anchor rod size | Material class | Effective embedment depth (mm) | Tension load (kN) (nominal/design) | Shear load (kN) (nominal/design) | ||
| Cracked concrete | Non-cracked concrete | Cracked concrete | Non-cracked concrete | |||
| M6 | 304 | 50 | 4.2*/3.5 | 4.2*/3.5 | 2.1/1.8 | 2.1/1.8 |
| 316 | 9.0*/7.5 | 9.0*/7.5 | 4.5/3.8 | 4.5/3.8 | ||
| M8 | 304 | 70 | 7.7/6.4 | 7.7/6.4 | 3.8/3.2 | 3.8/3.2 |
| 90 | 7.7/6.4 | 7.7/6.4 | 3.8/3.2 | 3.8/3.2 | ||
| 316 | 70 | 16.5/13.7 | 16.5/13.7 | 8.2/6.9 | 8.2/6.9 | |
| 90 | 16.5/13.7 | 16.5/13.7 | 8.2/6.9 | 8.2/6.9 | ||
| M10 | 304 | 70 | 12.2*/10.2 | 12.2*/10.2 | 6.1/5.1 | 6.1/5.1 |
| 100 | 12.2/10.2 | 12.2/10.2 | 6.1/5.1 | 6.1/51 | ||
| 316 | 70 | 20.5/11.4 | 26.1*/21.8 | 13.1/10.9 | 13.1/10.9 | |
| 100 | 26.1/21.8 | 261/21.8 | 13.1/10.9 | 13.1/10.9 | ||
| M12 | 304 316 | 70 | 17.7/14.8 | 17.7/14.8 | 8.9/7.4 | 8.9/7.4 |
| 80 100 | 17.7*/14.8 | 17.7*/14.8 | 8.9/7.4 | 8.9/7.4 | ||
| 17.7*/14.8 | 17.7*/14.8 | 8.9/7.4 | 8.9/7.4 | |||
| 120 | 17.7*/14.8 | 17.7*/14.8 | 8.9/7.4 | 8.9/7.4 | ||
| 70 | 20.5/11.4 | 28.7/15.9 | 19.0/15.8 | 19.0/15.8 | ||
| 80 | 25.0/13.9 | 35.1/19.5 | 19.0/15.8 | 19.0/15.8 | ||
| 100 | 35.0/19.5 | 37.9*/31.6 | 19.0/15.8 | 19.0/15.8 | ||
| 120 | 37.9*/31.6 | 37.9*/31.6 | 19.0/15.8 | 19.0/15.8 | ||
| M16 | 304 | 100 | 33.0/27.5 | 33.0/27.5 | 16.5/13.7 | 16.5/13.7 |
| 130 | 33.0*/27.5 | 33.0*/27.5 | 16.5/13.7 | 16.5/13.7 | ||
| 165 | 33.0*/27.5 | 33.0*/27.5 | 16.5/13.7 | 16.5/13.7 | ||
| 316 | 100 | 35.0/19.4 | 49.0/27.2 | 35.3/29.4 | 35.3/29.4 | |
| 130 | 51.9/28.8 | 70.7*/58.9 | 35.3/29.4 | 35.3/29.4 | ||
| 165 | 70.7*/58.9 | 70.7*/58.9 | 35.3/29.4 | 35.3/29.4 | ||
| M20 | 304 | 170 | 50.5*/42.9 | 50.5*/42.9 | 25.7/21.4 | 25.7/21.4 |
| 210 | 50.5*/42.9 | 50.5*/42.9 | 25.7/21.4 | 25.7/21.4 | ||
| 316 | 170 | 77.6/43.1 | 108.6/60.3 | 551/45.9 | 55.1/45.9 | |
| 210 | 106.5/59.2 | 110.3*/90.9 | 551/45.9 | 55.1/45.9 | ||
Through-Set Undercut Anchor (Stainless Steel)
| Anchor rod size | Material class | Effective embedment depth (mm) | Tension load (kN) (nominal/design) | Shear load (kN) (nominal/design) | ||
| Cracked concrete | Non-cracked concrete | Cracked concrete | Non-cracked concrete | |||
| M6 | 304 | 50 | 4.2*/3.5 | 4.2*/3.5 | 11.0/9.2 | 11.0/9.2 |
| 316 | 9.0*/7.5 | 9.0*/7.5 | 23.6/19.7 | 23.6/19.7 | ||
| M8 | 304 | 70 | 7.7/6.4 | 7.7/6.4 | 14.7/12.3 | 14.7/12.3 |
| 90 | 7.7/6.4 | 7.7/6.4 | 14.7/12.3 | 14.7/12.3 | ||
| 316 | 70 | 16.5/13.7 | 16.5/13.7 | 31.6/26.3 | 31.6/26.3 | |
| 90 | 16.5/13.7 | 16.5/13.7 | 31.6/26.3 | 31.6/26.3 | ||
| M10 | 304 | 70 | 12.2*/10.2 | 12.2*/10.2 | 19.0/15.8 | 19.0/15.8 |
| 100 | 12.2/10.2 | 12.2/10.2 | 16.7/13.9 | 16.7/13.9 | ||
| 316 | 70 | 20.5/11.4 | 261*/21.8 | 40.7/33.9 | 40.7/33.9 | |
| 100 | 26.1/21.8 | 26.1/21.8 | 35.8/29.8 | 35.8/29.8 | ||
| M12 | 304 316 | 70 | 17.7/14.8 | 17.7/14.8 | 23.7/19.8 | 23.7/19.8 |
| 80 | 17.7*/14.8 | 17.7*/14.8 | 23.7/19.8 | 23.7/19.8 | ||
| 100 | 17.7*/14.8 | 17.7*/14.8 | 23.7/19.8 | 23.7/19.8 | ||
| 120 | 17.7*/14.8 | 17.7*/14.8 | 23.7/19.8 | 23.7/19.8 | ||
| 70 | 20.5/11.4 | 28.7/15.9 | 50.8/42.3 | 50.8/42.3 | ||
| 80 | 25.0/13.9 | 35.1/19.5 | 50.8/42.3 | 50.8/42.3 | ||
| 100 | 35.0/19.5 | 37.9*/31.6 | 50.8/42.3 | 50.8/42.3 | ||
| 120 | 37.9*/31.6 | 37.9*/31.6 | 50.8/42.3 | 50.8/42.3 | ||
| M16 | 304 | 100 | 33.0/27.5 | 33.0/27.5 | 35.3/29.4 | 35.3/29.4 |
| 130 | 33.0*/27.5 | 33.0*/27.5 | 35.3/29.4 | 35.3/29.4 | ||
| 165 | 33.0*/27.5 | 33.0*/27.5 | 35.3/29.4 | 35.3/29.4 | ||
| 316 | 100 | 35.0/19.4 | 49.0/27.2 | 75.6/63.0 | 75.6/63.0 | |
| 130 | 51.9/28.8 | 70.7*/58.9 | 75.6/63.0 | 75.6/63.0 | ||
| 165 | 70.7*/58.9 | 70.7*/58.9 | 75.6/63.0 | 75.6/63.0 | ||
| M20 | 304 | 170 | 50.5*/42.9 | 50.5*/42.9 | 93.7/78.1 | 93.7/781 |
| 210 | 50.5*/42.9 | 50.5*/42.9 | 93.7/78.1 | 93.7/78.1 | ||
| 316 | 170 | 77.6/43.1 | 108.6/60.3 | 200.8/167.3 | 200.8/167.3 | |
| 210 | 106.5/59.2 | 110.3*/90.9 | 200.8/167.3 | 200.8/167.3 | ||
Applications
- Fixing curtain wall brackets and subframes
- Load anchoring for steel structures
- Anchoring of stair tread plates and joint covers
- Installation of crash barriers and noise insulation walls
- Fixation of steel plates for bonded steel reinforcement
- Anchoring for concrete overlay and structural connection points
- Rail transit anchoring system
- Bridge and roadway anchoring systems
Features
- No secondary drilling required, efficient and time-saving installation
- Outstanding durability with excellent weldability and heat resistance
- Low expansion stress, compatible with various grades of concrete
- Available in different materials and corrosion protection options based on environmental demands
- Engineered locking mechanism provides reliable tensile and shear capacity
- Simple design with strong seismic performance and abrasion resistance
Test Reports
Our mechanical anchors are tested to ensure structural reliability and performance under demanding conditions. The following reports confirm compliance with key industry standards:
- Tensile and Shear Strength Test Report (M10, M16, M20, M24)
- Seismic Resistance Report
- Fatigue Resistance Report (2 million cycles)
- Corrosion Protection Salt Spray Test Report
- Safety Performance Certification Report
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