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| How
to Select a Roh'lix® Linear Actuator |
1. Determine
Thrust Requirement.
• F=thrust requirement (Lbs.)
• µ=Coefficient of friction
• W=weight of load being moved (Lbs.)
Click
here for additional information if you are sizing for an application
with high acceleration / deceleration rates.
2.
Determine Lead/ Driveshaft Speed/ Linear Speed.
• Driveshaft RPM = speed of shaft driving the Roh'lix (RPM)
• Linear Speed = travel rate of the Roh'lix (inches
per sec.)
• Roh'lix Lead = lead of the Roh'lix (inches per shaft
revolution)
3.
Select Roh'lix Model.
Choose
a Roh'lix Model from the Inch
Models or from the
Metric Models
that has a thrust equal to or exceeding the thrust requirement
determined in Step 1
and lead that fits the driveshaft RPM and linear speed needs from
Step 2.
4. Verify
Shaft Diameter.
Driveshaft speed should be within the maximum recommended driveshaft
speed shown
in the Speed vs Length Chart.
If driveshaft speed is above the recommended speed,
try changing one or more of the following:
- Change
the bearing mounted method to B or C to increase the maximum
recommended driveshaft speed above the application requirement,
or
- Change
to hollow shafting, which will increase the maximum recommended
speed by approximately 50% above ratings shown in the Speed
vs Length Chart, or
- Select
a higher lead Roh'lix to reduce the shaft speed requirement,
yet still maintain the desired linear travel rate.
5. Click
here if you wish to find the required driveshaft torque.
Go to the Dimensions
Chart
NOTE:
Stainless steel hardware and bearings may be supplied
along with a clear chromated block for use in corrosive
atmospheres in sizes 1 through 4, however thrust rating
must be derated by 25%.
Anodized
or stainless steel blocks are not available.
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