There are relatively few moving parts in a traditional weight and pulley system. Sash have become increasingly heavy with larger glass sizes and double and even triple glazing and the use of very high quality pulleys has become critical. Failure in a pulley (binding, squealing or even a broken axle) results in an improperly operating window. In these cases, repair can be very time consuming and expensive, involving the removal of trim, sash, weather-stripping systems, disassembly of the weight and chain from the sash, installation of a proper high quality sash pulley, reassembly and re-painting. Pulleys are “deeply” built into the construction of and are critical to the smooth operation of a well performing double hung window. It is essential to use the very best.
These sash pulleys are the finest available in appearance, durability, and function. Model PBB 225 pulleys are designed for sash weights up to 1-3/4″ diameter when used in typical 7/8″ thick jambs typical in residential and smaller buildings. Commercial and institutional buildings may require the larger 2-1/2” sash pulley, click here for more information. The pulley is carefully designed with a precisely machined faceplate and the radiused ends allow for rapid, simple and accurate mortising with a standard 1-1/8″ diameter router bit. Housing body = 2-7/8″ X 7/8″ X 1-7/8″ deep.
The solid brass forged and machined housing shields the ball bearing and axle, preventing dirt and grit from affecting performance and assuring many decades of easy operation. The wheel is CNC machined from solid brass stock. The pulley utilizes a chromed steel axle and sealed ball bearing. Available in five finishes: Lacquered Brass, Unlacquered Brass, Oil Rubbed Bronze, Polished Nickel and Satin Nickel.
By using bronze or stainless steel sash chain with these pulleys you virtually eliminate all maintenance to the weight and pulley system.