How do you fit a Nord-Lock washer?
Place one pair of Nord-Lock washers underneath the head of the bolt and mount it in the through hole. Place the second pair of washers on the bolt and mount the nut. We recommend the use of a lubricant. Lubricate the thread and the area under the head prior to installation.
How do you lock a washer with a bolt?
Place the lock washer under the threaded fastener and ensure that it has a snug fit. If using a lock washer with teeth, make sure they will engage with the appropriate surfaces. If they don’t, swap out the washer for the appropriate one. Turn the fastener with a ratchet or wrench until it tightens to a firm connection.
What is wedge lock washer?
A wedge washer is engineered with the same wedge-locking design as a standard washer, but with a beveled washer design that enlarges the outer diameter of the washer. Additionally, wedge lock washers provide the perfect locking solution for softer materials, large or slotted holes and painted or sensitive areas.
When should you not use Nord-Lock?
Designs where Nord-Lock SC-washers are not recommended: When mating surfaces are harder than the washers. With very soft mating surfaces — for example, wood and plastic. For applications with extremely large settlements. When there is no clamping force in the joint.
How many times can a Nord-Lock washer be used?
Nord-Lock washers can normally be reused. As with all fasteners, they should be inspected for wear before reassembly. Make sure that the washers are reinstalled correctly cam face to cam face. Nord-Lock recommends lubrication of fasteners before reuse in order to minimize changes in friction conditions.
When should you not use a Nord-Lock washer?
Designs where Nord-Lock SC-washers are not recommended:
- With plain washers.
- When mating surfaces are not locked in place.
- When mating surfaces are harder than the washers.
- With very soft mating surfaces — for example, wood and plastic.
- For applications with extremely large settlements.
Do lock washers do anything?
They are still used on many applications in the belief that they will will “lock” the nut/bolt to the joint and prevent loosening. The body of evidence, based upon both experience and experimental results, is that they do not prevent loosening and can be shown to actually speed up the rate of loosening in many cases.
Does lock washer go on first?
When used correctly, a lock washer will hold the nut or other threaded fastener in place. To help it accomplish this, put the lock washer on first, below the fastener. If your project calls for other washers or hardware elements, they should go on before the lock washer so that it can hold them in place.
Do lock washers work?
Helical spring lock washers have been in use for well over 100 years. They are still used on many applications in the belief that they will will “lock” the nut/bolt to the joint and prevent loosening. Junker originally showed in his work published in 1969 that these washers are ineffective in preventing loosening.
Can a Nord lock washer fit under a standard bolt?
Nord-Lock washers safely lock the bolt against the underlying surface. The outer diameter of regular Nord-Lock washers is designed for counterbore holes according to DIN 974, i.e. the washers fit under the head of standard bolts.
Why do you need a Nord lock wedge lock?
Nord-Lock created the original wedge-locking technology that secures bolted joints, even when exposed to severe vibration and dynamic loads. It is impossible for our products to loosen unintentionally due to the wedge created underneath the bolt head and nut.
How to optimize load distribution with Nord lock washers?
Where are the chamfers on a Nord lock washer?
/EN 14399-4 /EN 14399-8. In order to ensure an optimal contact surface between the bolt and the washer, each SC-washer pair has chamfers on the inner diameter. Since the chamfer is present on both sides of each pair, it eliminates the risk of incorrect installation of the washer.