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| 80/20’s
modularity is based upon the T-slot concept of our profiles. The “T”
shaped slots present on all of our profiles allow for infinite positioning
along the axis. While there are other types of T-slotted profiles in the
industry, one modification to the 80/20 line is a slight adjustment to the
“T” which creates the 2° Drop-Lock Feature. Note the “T”
Shape of the assembled bolt and nut shown in the example to the right. |
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| Material
Specifications For 80/20 T-Slotted Aluminum Profiles |
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- Yield strength
241.1 N/mm2 (35,000 psi) minimum
- Tensile strength
262.0 N/mm2 (38,000 psi) minimum
- Elongation A5 minimum
10%
- Elongation A10
minimum 8%
- Elasticity E approximately
70,326.5 N/mm2 (10,200 k lbs./sq. in.)
- Brinell hardness
approx. 75 HB (Rockwell hardness approximately E-88)
- Profile conforming
to DIN 17 615 specifications
- Twist per 304 mm
(1 foot) of length not to exceed .25 degree and total twist over 6.1
m (20 feet) of length not to exceed 1.5 degrees
- Flatness 0.32 mm
(.004 in.) per 25.4 mm (1 in.) of width
- Straightness 0.32
mm (0.0125 in.) per 304 mm (1 foot) of length, not to exceed 3 mm (.118
in.) over 6.1 m (20 feet) of length
- Unless otherwise
specified, all extrusions will have etch and clear (204R1) anodizing
with depth of 0.010 mm (.0004 in.) and surface hardness of approximately
250 HV (anodized extrusions should not be welded because of toxic fumes)
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| Simple
Beam Deflection Calculations |
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Example
Using Formula A:
Using the 30-3030 T-slotted profile, a length of 762 mm, and an applied
force of 222.4 Newton, you should find the approximate beam deflection
to be 1.092 mm.
Formula Reference:
L = Length in Millimeters
W = Load in Newton
E = Modulus of Elasticity (70,326.5 N/mm2)
D = Deflection in Millimeters
I = Moment of Inertia |
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©2006 80/20 Inc. All Rights Reserved
