Bolzero Washer
Bolzero-washer firmly prevents co-rotating of the bolt-head when fastening the bolt.
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“Hexagonal Shape”＆“Cone Back” are our Technique (patented)!
The hexagonal shape and conical underside are critical design features. Not only do they increase the effective friction diameter where the washer contacts the floor surface firmly, but also significantly enhance the friction coefficient compared to a flat washer.
Do you have problems with bolt-heads co-rotate?
Bolzero Washer will solves all co-rotation problems.
Bolzero Washer will solves all co-rotation problems.
No need for expensive jigs to prevent co-rotation.
No need for expensive jigs to prevent co-rotation.
Wedge-lock Washer
Though this is a good anti-loosening washer, you must take care when using it on both sides of the nut side and the bolt head side at the same time.
The head of the bolt will always rotate with the nut, causing the bolt to loosen. The washer surface is coated with zinc-powder to reduce the coefficient of friction, which can easily cause this problem.
Trouble is, using a spanner or the like to stop the bolt-head from turning does not help.
This is because the bolt head will continue to rotate [until] the spanner starts to work. However, Bolzero Washer solves this serious problem.
Double lock nut
This is a great anti-loosening nut, but the bolt head may co-rotate along with vibration. Using our non-rotation washer (=Bolzero Washer) on the bolt head will prevent this co-rotate.
Lock Nut
This is a great anti-loosening nut, but the bolt head may co-rotate along with vibration. Using our non-rotation washer (=Bolzero Washer) on the bolt head will prevent this co-rotate.
Products like vibration-proof nuts, anti-loosening nuts, and washers designed to keep nuts tight are available in the market, but they are meaningless if the bolt head rotates. In vibration tests, even if the nut is secured with anti-co-rotation measures and does not loosen, the bolt head can still rotate, causing the bolt to loosen. This is a fact, and it inevitably occurs under vibration. In other words, preventing the nut from loosening and preventing the bolt from loosening are two separate issues. By applying with Bolzero Washer to the bolt head, you can prevent loosening the entire system of bolt-fastening.
How to solve the problem.
“Bolzero Washer” will solve this problem everything.
Principle
Seating surface of the nut (or Bolt head) T1=F1×r
Seating surface of the washer to the floor T2=F2×R
As F1＝F2 →T1 ＆lt; T2
A（40％）
Equivalent turning-torque accruing from the friction between the threads
B（50％）
Equivalent turning-torque accruing from the friction between the Seating surface
C（75％ or over）
Equivalent cling-torque to the floor by Bolzero washer
C=B×(Effective friction diameter of the washer÷Effective friction diameter of the bolt head)
=B×1.5(Designed to be 1.5 or over)
C÷A≒1.88 or over(nearly twice)
The torque required to keep the washer firmly anchored to the floor and prevent co-rotation with the nut is nearly twice the torque required for the nut to turn the bolt during tightening. The principle is therefore that the washer will never co-rotate.
Dimensions
Completely prevents the bolt heads co-rotating.
We can have Inch size custom ordered for you.