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How are "diameters" of blind rivets measured?
The term "diameter" refers to the nominal measurement of the rivet shank in 1/32", thus a 4 diameter rivet would be 4/32 or 1/8".
How are grip lengths of blind rivets established?
The typical industry accepted range between grip lengths are measured in 1/16" increments. For example a CR3212-4-05 rivet will have a material thickness or grip capability of .251 - .312". To further explain - 05 is 5/16" maximum material thckness. To determine the minimum material thickness we subtract 1/16" - arriving at .251".
Can I use commercially available installation tools to install Cherry aerospace fasteners?
Commercial riveting tools are designed to install softer stem, non-serrated commercial rivets. Cherry aerospace fasteners use hardened stems to meet the performance values required in the relevent procurement specifications. These stems must have pulling serrations that match the serrations in the installation tool pulling heads in order to install properly. Use of commercial riveting tools frequently results in poor aerospace fastener installations, and may require removal of the fastener for replacement. Use only Cherry recommended tool systems with Cherry fasteners.
What is the meaning of "456" on Cherry pulling heads?
-456 indicates the the pulling head is capable of installing the 4 diameter (1/8"), 5 diameter (5/32") and 6 diameter (3/16") CherryMax rivets.
What power tool models should I use to install CherryMAX® rivets?
The newest, smallest and lightest weight pneumatic tool is the G747. This tool and the G704B power riveter will install -4,-5 and -6 diameter CherryMax rivets, using the H701B-456 straight, H753A-456 right angle or H782 offset pulling heads. When using -8 diameter rivets, the larger G83 power riveter is needed. It uses the H84A-8 pulling head for -8 diameter rivets, and the H701B-456 pulling head with 744-300 adapter for -4, -5, and -6 diameter rivets. Right angle and offset tools are also available for this tool. All of these tools have been used for many years.
Will my older CherryLOCK® tools pull CherryMAX® rivets?
Yes. A G784 or G684 model tool will pull the -4, -5, and -6 diameter CherryMAX® rivets using a H680B200A pulling head.
Will my CherryMAX® tools pull CherryLOCK® rivets?
No. The single action CherryMAX® tools will NOT pull the double action CherryLOCK® rivets. A double action tool must be used in order to insert the locking collar of the CherryLOCK®. Double action tools are the G784, and the G689 models with the H681 series pulling heads. The single action CherryMAX® tools will, however, install the CherryLOCK® "A" Code fastener. The "A" code signifies single action tooling with a special pulling head to seat the locking collar. For example, a single action G746A tool will install the CherryLOCK® "A" Code with an H955 series pulling head.
Can I order wiredraw CherryMAX® rivets to the NAS1398 and NAS1399 specifications?
Yes. There is a code in the part number that calls out the CherryMAX® type fastener under these specifications. The code is "AB", and is located in the part number as follows: NAS1398C4AB2. The "AB" is located between the diameter number and the grip number. All materials, strengths, and features remain the same, except that the rivet comes with the driving anvil above the rivet head to allow the use of single action tools.
What is the difference between CherryMAX® and the POP®-type rivets I can buy at my local hardware store?
The CherryMAX® blind rivet is a high-strength fastener specifically designed to withstand the stresses found in aerospace structures. The materials, manufacturing methods, and quality testing in every CherryMAX® product are all part of the Cherry Aerospace "system" to provide a safe, strong, and reliable fastener for the aerospace industry. In addition, CherryMAX® was designed to be especially simple to install. Neither specialized training for the rivet installer, nor complex tooling are needed to successfully install CherryMAX® rivets.