The Nuts and Bolt Tensioner of a Garage Door Opener


We see them go up, we see them go down; remote controlled or automatic, yet no matter what form they come in, all doors chiefly operate on the basis of and cannot work without door openers. These are the motorized devices we usually see encased in small black boxes attached to garage doors. Bolt Tensioner Garage door openers were first used in the 1800’s and since then have been indispensable to most homes.

Roller garage openers and electric ones are very similar. They both operate on the same principle which is the physics of springs and tension. This is because, contrary to popular belief, electric garage door openers do not use electricity to provide the lifting power. Instead both door openers rely on springs and the Bolt Tensioner in these springs to provide the strength to lift the doors.

This is the reason why Bolt Tensioner springs are more popular nowadays. Because by virtue of its wound-up coiled form, it can provide extremely high tensile strength that is enough to life the more popular double doors.Other than the springs that provide the door opener its strength, there are also other mechanisms that hold the opener together and make it all work.

Bolt Tensioner range from the most common household types to specialty types.Check out the website that specializes in wrenches at for details.
Or contact us
Company Name: Hang Zhou WREN Hydraulic Equipment Manufacturing Co., Ltd.
Address: No. 24, Xingxing Road, Linping, Hang Zhou, China
Tel: +86 571 8811 5720
Fax: 0571-88110210
Postcode: 311100