Line Pull Determination for 
Chainless Conveyors

Line Pull is the force required at the drive to operate a Chainless Conveyor.
By calculating the correct line pull for the conveyor, a suitable drive unit can be selected to operate the system efficiently to the customer’s satisfaction.
Complete information, as outlined below, is a pre-requisite in determining the required line pull.

1. Maximum live load weight per trolley.
2. Maximum dead weight of trolley attachments.
3. Dead load weight per foot of trolley and spacer rods
(Per weight table below)


Pitch lbs./Ft.

12”  8.5
18” 6.1
24” 5.0
36” 3.8
48” 3.2

4. Load and unload station location.
5. Total number of loaded trolleys operating on the conveyor at the same time (Max)
6. Total number of trolley attachments on the conveyor attachments on the conveyor at the same time (max)
7. Location of dips and raises, loaded or unloaded.
8. Speed (F.P.M.) of system (for variable speed, list high and low)
9. Area atmosphere conditions such as various levels of heat, moisture, fumes, dirt, dust, and temperature variations.
10. Good Judgment in analyzing the above before selecting and locating the drive unit.

1. In a multiplane system, locate the drive unit so that a declining curve is on the slack side of the drive.
2. Always assume the system will be slightly overloaded.

Line Pull Coefficient of friction multiplier
Ball bearing Wheels (X.03) Based on normal atmospheric conditions and well lubricated bearings.

Shielded bearing Wheels (X.06) Based on normal atmospheric conditions. The factory should be consulted on shielded bearing seal applications

Chainless Conveyor Menu

Calculation and Design

Sample Chainless Line Pull Calculation

Line Pull Determination

Track and Fittings


Trolley Attachments

Drive Assembly

How to Specify Curves

Corner Load Clearance Chart

How to Compute Vertical Curve Dimensions

Vertical Curves Load Clearance Chart

Load Table