HARDLOCK ® SELF-LOCKING DESIGN
Utilizing the Wedge Principle from Ancient Japanese Architecture The Hardlock ® Nut (HLN) is the ultimate self-locking nut, perfectly integrating the nut with the bolt. This technology is based on the traditional Japanese “Wedge” principle, ensuring a secure and reliable connection.
PRINCIPLE
WEDGE
1. Strike the wedge with a hammer
2. Push the wedge into position with a nut
3. Integrate the wedge with the nut
HARDLOCK ® NUT
Strong Locking Force: The wedge principle creates a strong locking force that keeps the Hardlock ® Nut intact, even under severe vibrations or impacts.
2
1. CONVEX NUT (FIXING NUT): The convex nut has a truncated protrusion arranged off-center on the upper part.
2. CONCAVE NUT (LOCKING NUT): The concave nut is designed with a concentric conical depression for locking the two nuts together.
1
The Hardlock ® Nut technology utilized in the Tsubaki Smart Connect ™ system is covered under the following patent:
HARDLOCK ® is a registered trademark (U.S. Reg. No. 4,762,537) owned by Hardlock Industry Co., Ltd., 6-24, Kawamata 1-chome, Higashiosaka-shi, Osaka, Japan 577-0063.
NUT TIGHTENING TORQUE N*m (lbf*ft)
NUT SIZE
M12xP1.75
M12xP1.75
M16xP2.0
M16xP2.0
M20xP2.5
M24xP3.0
M27xP3.0
M30xP3.0
LOWER NUT
27-32 (20-24)
28-33 (21-24)
46-55 (34-41)
72-82 (53-60)
120-130 (89-96)
218-228 (161-168)
250-260 (184-192)
367-377 (271-278)
UPPER NUT
27-32 (20-24)
28-33 (21-24)
46-55 (34-41)
72-82 (53-60)
120-130 (89-96)
218-228 (161-168)
250-260 (184-192)
367-377 (271-278)
Visit www.ustsubaki.com/smart-connect for more information.
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