Miller SRL2-M Series
Rodless Cylinders
21
Sizing Guide for SRL Rodless Cylinder
Introduction
Unlike traditional cylinders with piston rods, where load forces are
normally experienced on the cylinder centerline, the design of rodless
cylinders dictates that
all
load forces are eccentric to some degree.
Depending on the application, these eccentric load forces can become
quite substantial and create an adverse effect on cylinder performance
and life expectancy. As a result, the use of rodless cylinders, and the
manner in which they are designed into a system, requires careful
consideration of a variety of engineering factors to ensure optimal
performance. These factors include load moments, mounting method,
total weight and resistive force, velocity and deceleration.
Note: Miller Fluid Power Application Engineers will be happy to assist
you in evaluating your application. For your convenience, there are
typical application loading diagram forms on pages 28-31 which show
the three basic cylinder mounting conditions:
Condition 1 - Cylinder horizontal, Table horizontal
Condition 2 - Cylinder horizontal, Table vertical
Condition 3 - Cylinder vertical, Table vertical
Select the application loading diagram that fits your application. Fill out
the form and include any other pertinent data along with your name and
your company name, address, phone and/or FAX number and FAX the
form and information to Miller Fluid Power for review.
Load Moments
There are three load moments to be considered:
Bending Moment (M1), Radial Moment (M2), and Cross Moments (M3),
as illustrated in Figure 8.
The preferred location of any load is in the center of the cylinder table.
Some applications may require the load to be offset. To help in
determining the load moments affecting your application, some of the
typical loading diagrams, forces, and distances to consider are shown
on page 22.
Figure 8
Bending Moment M1
Radial Moment M2
Cross Moment M3
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