ANSI SCTE 185-2017 pdf free download – Test Method for Cantilever Force, Female “F” Port.
This test procedure is used to evaluate the mechanical strength of female “F” ports on passive or active devices when a cantilever force is applied to the port.
1.3. Benefits
This procedure is needed to determine whether a “F” port is strong enough to withstand high cantilever forces without damage.
1.4. Intended Audience
This is a laboratory test intended for engineers to evaluate product performance.
2. Normative References
The following documents contain provisions, which, through reference in this text, constitute provisions of this document. At the time of Subcommittee approval, the editions indicated were valid. All documents are subject to revision; and while parties to any agreement based on this document are encouraged to investigate the possibility of applying the most recent editions of the documents listed below, they are reminded that newer editions of those documents might not be compatible with the referenced version.
2.1. SCTE References
• No normative references are applicable.
2.2. Standards from Other Organizations
• No normative references are applicable.
2.3. Published Materials
• No normative references are applicable.
3. Informative References
The following documents might provide valuable information to the reader but are not required when
complying with this document.
3.1. SCTE References
• No informative references are applicable.
3.2. Standards from Other Organizations
• No informative references are applicable.
3.3. Published Materials
• No informative references are applicable.
6. Equipment
Tensile force testing machine (Instron Model 1122 or equivalent) with a recording device. It may be desirable to have an automatic cut off feature which can be activated by a maximum excursion limit setting and/or maximum force limit.
Mounting stand to secure the sample to the Instron base with the sample test port perpendicular to the axis of applied force. A possible configuration is shown in the accompanying drawing (Figure 1).
Cantilever test fixture (Figure 2) that goes over the port to be tested.
Mounting fixture to attach the test fixture to the Instron moving cross head. A pin through the test fixture 0.25 inch hole allows it to swivel as the cross head moves up.
7. Test Samples
A minimum of five samples of each device shall be used for testing.
8. Testing Method
1. Calibrate the tensile test fixture per the manufacturer’s recommendations.
2. Secure the device with the female “F” port to be tested to the mounting base.
3. Install the cantilever test fixture onto the female “F” port to be tested and zero out the force gauge.
4. The female “F” port under test shall be pulled to the specified limit or until failure at a cross head speed of 2 inches per minute. Failure is defined as any part of the port breaking, cracking or bending when inspected with the naked eye.
5. Record the maximum measured tensile force on the attached Report Form.
6. Calculate cantilever failure force applied to the tip of the female “F” port using the following formula:
Cantilever Force = Tensile Force * 7.5
Note: The factor 7.5 is the ratio of the test fixture length, 2.25”, to the port bore depth, 0.30”.ANSI SCTE 185 pdf download.