Roller Identification (Straight Rollers)

Is the roller powered or non-powered?
(i.e., Does it have a cable?)
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Yes, the roller is powered.
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No, the roller is not powered.
What kind of shell does the roller have?
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The shell is smooth steel (silver color).
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The shell is steel with grooves (silver).
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The shell has an orange sleeve.
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The shell has a black sleeve.
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The shell is textured.
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The shell has colored rings.
What kind of axle does the roller have?
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The axle is plain steel (silver color).
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The axle is plastic (black color).
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The axle is plain, round steel (silver color).
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The axle has internal threads (silver color with hole).
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The axle is extended steel.
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There is no axle.
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The axle is powered (cable).
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The axle is tapered (the base is larger than the tip).
What kind of bearing does the roller have?
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The bearing is steel (silver color).
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The bearing is plastic (black color).
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The bearing is powered (with cable).
Use the digital caliper to measure the diameter of the roller as shown below. Be sure that you are measuring a metal part of the outside of the roller.
 
Caliper 1
Use this link if you experience trouble measuring: Proper Use of Digital Calipers – Bantam Tools
 
Look at the digital readout once you have measured. Which approximate diameter does the roller have?
1.4"
1.9"
1.6"
2.19"
2.5"
50mm
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