Page 40 - 2020 Product catalog

POWER TROLLEYS

The main function of the trolley is to support the weight of the chain, the hanger, the piece in work and other
conveying equipment parts. Therefore, selecting the appropriate trolley is crucial at the design phase of setting up
a conveyor. The main parts of a trolley are: bearings, forged brackets, and hangers.

Bearings Both inner and outer rings are made of alloy steel. This steel combined with a hot and
cold forging processing and precision machining provides a high quality durable product.
They come in two options: Full Ball Complement Type and Retainer Type. The design
includes grease f ittings to ensure full lubrication and low friction on the ball bearings. The
deepened ring raceways can withstand the impact load coming from any direction. The
enlarged bearing clearance will stop the bearing from freezing up under thermal expansion
conditions. The triple labyrinth seal design provides excellent protection from contaminants.
We provide a variety of seal designs to match the customer's equipment environment.

Full Ball Complement Type (Standard)
The advantage of the full ball complement type is that it is easy to maintain. Because of the
large surface contact area of each steel ball on the inner and outer rings of the bearing
unit, it can endure high load capacities. This type of trolley wheel has no retainer or retaining
ring and is the f irst-choice trolley wheel for use in applications where the components are
prone to exposure to contaminants, dirt, grit, moisture, etc.

Retainer Type (Optional)
The advantage of the retainer design is the reduction of the bearing's steel balls colliding
into each another during rotations. The durability and smoothness of the steel balls are
enhanced, thereby ensuring a longer service life of the bearing unit.

Forged Brackets Our forged brackets are forged from high-strength carbon steel. The brackets are divided
into two types: Overhead and Inverted. The brackets are pulled along the track by the
chain and they need to bear the resultant tension of the chain when the chain goes
through horizontal and vertical turns. The brackets ensure the chain runs according to the
designed track line. The strength of the brackets is crucial and will inf luence the service life
of conveyor systems.

Hangers The Hanger load must be directly below or above the trolleys, so that the vertical load does
not affect the chain operation. If the load exceeds the maximum capacity of a single trolley
assembly, a load bar is used to connect two trolley assemblies and equally distribute the
load over the pair of trolleys. The load is suspended at the center of the load bar. We offer a
wide variety of Hangers for customer to choose from.

39 Power Trolleys