Regular maintenance is crucial for extending the service life of electric window openers. It is recommended to inspect the motor, wiring, and guide rails every three months, promptly removing dust and debris; avoid overloading; and regularly lubricate mechanical components to ensure smooth window operation.
Although door and window handles are small components, they directly affect daily usage convenience and safety.
3H Building Hardware will continue to uphold the development philosophy of "win-win cooperation and harmonious growth," focusing on advancing its expertise in door/window hardware and sealing systems.
3H Building Hardware remains steadfast in its belief: Only by staying true to our founding vision and consistently delivering both brand excellence and product quality can we secure market success and reputation. Moving forward, we will continue to uphold our artisanal craftsmanship, deepen R&D innovation, and refine our end-to-end service ecosystem. Through superior products and solutions, we aim to drive high-quality development in the doors, windows, and curtain wall industry, living up to the honor and mission bestowed by the AL-Survey Brand Awards.
This standard applies to common window types such as casement windows (inward or outward opening), top-hung windows, and bottom-hung windows.
LTS25
3H INC.
Item No. | LTS25 |
Size | 80.5*39*23.8mm |
Application | Sliding door and sliding window |
Material | 304 stainless steel + Nylon Wheels |
Surface Treatment | Natural |
Color | Natural |
Load Bearing | 60KG/pair |
Function | durable,easy-installation,smooth-operation |
Package | Box |
Specification

Product Description
1. Maximum load bearing is 60 kg/pair.
2. Many options for nylon roller,please give clean indication of parameter of the rail shape and angle when place the order.
3.Door rollers work well after 100,000 cycles tested with its biggest capacity.Window rollers work well after tests of 25,000 cycles tested with its biggest capacity.
How to Select the Roller?
The selection is based on the weight of sash,the hardware space of the profile and the load bearing of the roller:
a).window/door sash weight=(glass weight+sash profile weight)*1.3(safety index);
b).the shape and dimension of the roller must accord with the shape of the bottom slide rail;
c).select the suitable roller according to point a) and b).
Note:the load bearing of the roller is one pair.
The installation of the roller
The connection of the roller and the sash is different due to the difference of the roller and profile.
Decide the way of thee installation first,then use screw or bolt accordingly.
2.The roller and the bottom of the sash must be firmly connected.
Notice
The use effect of the roller is relevant with its load bearing,wheel rail,shape and angle,please
make a trial installation before ordering great amount.
