Tube - Head Tube - EC34 - 33.8 x 38.9 x 950 mm

Name: Tube - Head Tube - EC34 - 33.8 x 38.9 x 950 mm
SKU: 45291
Price: 491.99 USD
Availability: InStock

P/N: 45291

Available Now: 1

~37.4” ◾ 950mm

P/N: 45291

Available Now: 1

$491.99

2 - 4

$489.79

5 - 9

$274.59

10 +

$209.39

Quantity

Contact Info

First Name

Last Name

Phone Number

Company

Units:

Project Details

Quantity Needed

Quantity must be greater than 1.

Full Length

Custom Length

Length ([tolerance value] max)

Please select a valid length.

Precision of Measurement

±[tolerance value]

Please select a tolerance option.

No Sanding - Product comes in original finish
Standard Sanding - Matte, smooth finish that is paint/bond ready
- ~0.005 reduction on outer diameter (OD)."
- This removes the outer cello wrap gloss finish.
Custom Sanding - Need to meet a specific outer diameter
- Sand outer diameter to specified thickness.
- Patterns will likely distort in appearance
Final OD ([min] - [max])
Please select a value within the allowed range.
Sanding Tolerance Options:
- ±[tolerance value]
Please select a tolerance option.

If you are requesting bulk discounts, cutting, or standard sanding services only, we will send you a cart with your product selections. You may enter your shipping information and purchase directly at that time. Please note, the cart will not allow edits to the quote. Any changes will have to be completed by our team. If we do not have enough information to complete your quote we will reach out to you directly. If you are requesting additional services or custom sanding, a team member will reach out to you to finalize a quote.

If you request a custom length you will be charged for a full length item (or items if more than 1 is needed to meet your request) plus a cutting fee. You will then be shipped the item sized to your specification and any remaining length of the orginal item (drops). Sanding also incurs a fee which will be included in the quote. All items that have been sanded or cut may not be returned.

Additional Notes or Services Needed (Assembly, Bonding, Etc.) Timeline

Create a Rock West Composites account to build your own customizations.

Estimated lead time for quantities greater than what is Available Now is expected to be at least 4 weeks.

If there is an Available Now quantity listed above, it indicates our quantity in stock. Orders placed today for this quantity or less are expected to ship the next business day.

Tube - Head Tube - EC34 - 33.8 x 38.9 x 950 mm

Additional Information

Units:

Application	Bicycle
Frame Segment	Head Tube
Shape	Round
Materials	Standard Modulus Carbon
Pattern	Unidirectional
Color	Black
Finish	Sanded Smooth
Inside Diameter	1.331
Outside Diameter	1.531
Wall Thickness	0.100
Length	37.402
Length (max continuous)	37.402
Linear Density	0.298
Volumetric Density	0.055
Weight	0.928
Primary Fiber	Tenax UTS50
Primary Resin / Hardener	Eporite EHM32
HTS - Harmonized Tariff Code	6815.13.0000

Engineering Properties

All laminate properties and mechanical calculations are based on Classical Lamination Theory and should be used as a reference only. Rock West Composites does not guarantee these properties or calculations.

Units:

Avg EX Young's Modulus	1.502E7
Avg EY Young's Modulus	4544000.0
GXY Shear Modulus	2197000.0
X Tensile Yield Strength	90660.0
X Compressive Yield Strength	107300.0
Y Tensile Yield Strength	25400.0
Y Compressive Yield Strength	32750.0
XY Shear Strength	19440.0
CTEX	-1.98E-07
CTEY	3.06E-06
Poisson's Ratio vXY	0.268
Poisson's Ratio vYX	0.081

Note:

"X" is along the length of a tube, rod, plate, or panel.
"Y" is around the perimeter of a tube, perpendicular to the length of pultruded parts, or along the width of a plate or panel.

Calculators

Units:

Deflection & Failure of Round Cantilevers

Inputs

Notes:

A green highlight indicates a valid input.
A red box indicates an invalid input.
Part weight is taken into account for all calculations

Label	Value	Units
Point Load	Positive value for downwards force. Negative value for upwards force.	Pounds
Distributed Load (total)	Positive value for downwards force. Negative value for upwards force.	Pounds
Outer Diameter		Inches
Inner Diameter		Inches
Location of Point Load	Number between 0 and the value for Length This is a required field.	Inches
Length	Value up to	Inches

Outputs

Notes:

A green highlight indicates that a sample is unlikely to fail in this manner.
A red highlight indicates that a sample is likely to fail in this manner.

Label	Result	Units
Max Shear Stress		PSI
Max Bending Stress		PSI
Deflection at Point Load		Inches
Max Deflection Location		Inches
Max Deflection		Inches
Deflection at Free End		Inches
Part Weight		Pounds

Deflection & Failure of Simply Supported Round Beams

Inputs

Notes:

A green highlight indicates a valid input.
A red box indicates an invalid input.
Part weight is taken into account for all calculations

Label	Value	Units
Point Load	Positive value for downwards force. Negative value for upwards force.	Pounds
Distributed Load (total)	Positive value for downwards force. Negative value for upwards force.	Pounds
Outer Diameter		Inches
Inner Diameter		Inches
Location of Point Load	Number between 0 and the value for Length This is a required field.	Inches
Length	Value up to	Inches

Outputs

Notes:

A green highlight indicates that a sample is unlikely to fail in this manner.
A red highlight indicates that a sample is likely to fail in this manner.

Label	Result	Units
Max Shear Stress		PSI
Max Bending Stress		PSI
Deflection at Point Load		Inches
Max Deflection Location		Inches
Max Deflection		Inches
Part Weight		Pounds

Round Tubes and Rods - Axial Tension and Compression

Notes

Tension uses positive notation and compression uses negative notation.
End conditions are critical when considering buckling:
- Fixed = constrained in both translation and rotation.
- Pinned = constrained only in translation (ie. bolted joints).
- Free = not constrained (similar to a cantilevered end).
Long, skinny parts in compression are more succeptible to fail in buckling
Only parts in compression can fail in buckling

Inputs

Notes:

A green highlight indicates a valid input.
A red box indicates an invalid input.

Label	Value	Units
Load	Positive value indicates tension. Negative value indicates compression.	Pounds
Outer Diameter		Inches
Inner Diameter		Inches
Length	Value up to	Inches
End Conditions		N/A

Outputs

Notes:

A green highlight indicates that a sample is unlikely to fail in this manner.
A red highlight indicates that a sample is likely to fail in this manner.

Label	Result	Units
Max Axial Stress		PSI
1st Order Buckling Critical Load		Pounds
Change in Length		Inches (linear elastic only)
Part Weight		Pounds

Round Tubes and Rods - Critical Speed and Torque

Inputs

Notes:

A green highlight indicates a valid input.
A red box indicates an invalid input.

Label	Value	Units
Outer Diameter		Inches
Inner Diameter		Inches
Length	Value up to	Inches
Applied Torque		Foot-Pounds
Configuration		N/A

Outputs

Notes:

A green highlight indicates that a sample is unlikely to fail in this manner.
A red highlight indicates that a sample is likely to fail in this manner.

Label	Result	Units
Max Allowable Torque		Foot-Pounds
Twist Angle at Specified Torque		Degrees
Critical Speed _{(no factor of safety)}		RPM
Part Weight		Pounds

Layup Orientation

45291 Rev NC

Ply #	Orientation (degrees)	Location
1	(0/90 120 E-Glass Scrim)	Inside
2	(0/90 120 E-Glass Scrim)	↓
3	0
4	0
5	0
6	45
7	-45
8	0
9	0
10	90
11	90
12	0
13	0
14	-45
15	45
16	0
17	0
18	0	Outside

0° fibers maximize bending stiffness and run along the length of the part. Consider bending a tube over your knee.
45° fibers maximize torsional stiffness and are typically plied together in an opposing manner, i.e. ±45°. Consider twisting a tube like a vehicle's driveshaft.
90° (or "hoop") fibers maximize crushing stiffness and generally assist in overall durability. Consider laying a tube on the ground and stepping on it.

Tube - Head Tube - EC34 - 33.8 x 38.9 x 950 mm

~37.4” ◾ 950mm

Additional Information

Engineering Properties

Calculators

Deflection & Failure of Round Cantilevers

Deflection & Failure of Simply Supported Round Beams

Round Tubes and Rods - Axial Tension and Compression

Round Tubes and Rods - Critical Speed and Torque

Layup Orientation

45291 Rev NC

Tolerances

All head tubes have the following tolerance for inner and outer diameter.

STOCK TOLERANCE SHEET

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