China DIN 980 Refined Hexagonal Locking Nut Suppliers - High-Quality Factory Direct Grade 4.8 to 12.9 Nuts
Product Introduction
introduction
There are threaded holes drilled through the outer surface of the nut to the inner threaded surface (usually 2, distributed 90 degrees on the outer surface), which are used to screw in small diameter countersunk screws. The purpose is to apply a centripetal force to the thread to prevent the locking nut from loosening. The high-quality locking nut sold in the market is embedded with a copper small piece on the inner circular surface of the nut that matches the thread of the locking nut, to avoid direct contact between the radial locking screw and the locked thread and damage to the latter. This type of locking nut is gradually being applied in shaft end locking situations of rotating motion parts, such as anti loosening of ball screw mounting end bearings.
A specialized locking nut needs to be used together with a locking gasket. The dedicated anti loosening nut is not a hexagonal nut, but a medium round nut with 3, 4, 6, or 8 notches on the circumference of the nut (depending on the size of the nut and the manufacturer's product series). These notches are not only the focus of tightening tools, but also the entry point of the anti loosening pad clamp.
Usage
productsLock nuts made of different metals can be applied to different temperature conditions; However, due to the deformation resistance of the metal material itself, the deformation of the all-metal nut is not easy to control, which will lead to a relatively large dispersion of the anti-loosening torque, which is easy to cause the assembly to be cized; In addition, after the assembly of this kind of lock nut, due to the effect of friction, it is easy to cause damage to the coating on the thread surface, which affects the anti-corrosion performance.
When assembling the all-metal lock nut, the speed of the assembled tool should not be too high; If it is a lock nut with galvanized, Dacromet and other surface treatments, it should be lubricated first when used; The all-metal lock nut can be reused, but should not be installed more than 5 times.
| Thread size | M3 | M4 | M5 | M6 | M7 | M8 | M10 | M12 | M14 | M16 |
| Pitch | 0.5 | 0.7 | 0.8 | 1 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 |
| Fine teeth | - | - | - | - | - | 1 | 1 | 1.5 | 1.5 | 1.5 |
| Fine teeth | - | - | - | - | - | - | 1.25 | 1.25 | - | - |
| minimum | 6.01 | 7.66 | 8.79 | 11.05 | 12.12 | 14.38 | 18.9 | 21.1 | 24.49 | 26.75 |
| Maximum = Nominal value | 3.7 | 4.2 | 5.1 | 6 | 7 | 8 | 10 | 12 | 14 | 16 |
| minimum | 3.4 | 3.9 | 4.8 | 5.7 | 6.5 | 7.5 | 9 | 11 | 12 | 14 |
| Maximum = Nominal value | 5.5 | 7 | 8 | 10 | 11 | 13 | 17 | 19 | 22 | 24 |
| minimum | 5.32 | 6.78 | 7.78 | 9.78 | 10.73 | 12.73 | 16.73 | 18.67 | 21.67 | 23.67 |
| Thread size | M18 | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 | - |
| Pitch | 2.5 | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 4 | 4 | - |
| Fine teeth | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | - |
| Fine teeth | 1.5 | 1.5 | 1.5 | - | - | - | - | - | - | - |
| minimum | 29.56 | 32.95 | 35.03 | 39.55 | 45.2 | 50.85 | 55.37 | 60.79 | 66.44 | - |
| Maximum = Nominal value | 18 | 20 | 22 | 24 | 27 | 30 | 33 | 36 | 39 | - |
| minimum | 16 | 18 | 20 | 22 | 25 | 28 | 31 | 34 | 37 | - |
| Maximum = Nominal value | 27 | 30 | 32 | 36 | 41 | 46 | 50 | 55 | 60 | - |
| minimum | 26.16 | 29.16 | 31 | 35 | 40 | 45 | 49 | 53.8 | 58.8 | - |
Frequently Asked Questions
FAQHow do the radial locking screws prevent the lock nut from loosening?
Small diameter countersunk screws are screwed through the outer surface of the nut into the inner threaded surface to apply a centripetal force to the thread, which prevents the lock nut from loosening.
Why do high-quality locking nuts have a copper piece embedded inside?
A copper small piece is embedded on the inner circular surface to match the thread of the locking nut. This avoids direct contact between the radial locking screw and the locked thread, preventing damage to the latter.
What are the common applications for this type of locking nut?
This type of locking nut is commonly applied in shaft end locking situations of rotating motion parts, such as preventing the loosening of ball screw mounting end bearings.
How many times can an all-metal lock nut be reused?
The all-metal lock nut is reusable, but it should not be installed more than 5 times during its service life.
What lubrication requirements apply to surface-treated lock nuts?
For lock nuts with surface treatments such as galvanized or Dacromet coatings, they should be lubricated first before they are put into use.