Self Clinching Quick Release Standoffs Installation and Performance

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NORTHERN PRECISION LTD

Specialist Fasteners for Sheet Metal

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+44 (0) 1302 831555

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SELF-CLINCHING

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Performance & Testing Method

Fastener Type

QRSO (ZI)

QRSO (A2)

QRSO (AL)

QRSO (ZI)

QRSO (A2)

Test sheet material

Aluminium

Steel

Installation (kN)

7.0

16.0

Pushout (N)

1000

2500

All performance figures are averages obtained over a range of installations and should be used as an indicator only. Panel material, hole preparation, installation tooling and method can affect part performance. We always recommend that you carry out your own tests in the actual application. Please call our sales team and we will be happy to provide you with samples as well as offering technical assistance.

Hardened bushing with sufficient wall thickness to withstand applied compression load.

Head Dia. + 1.6mm

Test panel.

Applied Load from compression gauge.

Compression rig base.

Push-out testing of Self-Clinching Quick-Release Standoffs should be performed by the gradual application of a load as shown above. Bushing height should be sufficient to allow free downward movement of the standoff during testing. The bushing bore must be centred on the head of the standoff.

5.49^+0.08

Length of standoff +5mm min.

First punch or drill the correct size hole. Do not deburr or chamfer the hole prior to installation as this will remove material required during the clinching process. It is preferable to install the fastener from the punch side of the panel. Place the fastener in the prepared hole in the panel and then locate the fastener in the anvil. With the panel held level, apply a parallel squeezing force until the head is installed flush to the panel surface. Do not over squeeze the fastener into the panel as this will result in panel deformation. When installing Self-Clinching fasteners, please pay attention to the minimum hole centreline to edge and parent material hardness limitations.

Do not remove any extra material or chamfer the hole as this could result in improper installation or reduced performance.

HRB (ROCKWELL HARDNESS B SCALE) Ensure that you are installing into a panel that is ductile and at or below the published maximum recommended hardness for the fastener.

Ensure that attention is paid to the minimum hole centreline to edge dimension for each fastener. Installing too close to an edge or bend could result in improper installation or reduced performance. Minimum centreline to edge dimensions shown for each fastener apply to one edge only. If this distance is applied on multiple sides there will be significant panel distortion unless the panel edges are supported during installation.

Material & Finish

Electro Zinc Plated Steel (ZI) parts are suitable for installation in ductile panels with a maximum recommended hardness of 60 HRB. Stainless Steel (A2) parts are suitable for installation in ductile panels with a maximum recommended hardness of 70 HRB. Aluminium (AL) parts are suitable for installation in ductile panels with a maximum recommended hardness of 50 HRB.

Part Number Examples

Part number is made up as follows: (Type)-(Mounting Hole Size)-(Length)-(Material/Finish Code) For example: QRSO-4MM-10-A2 (Quick-release standoff-4.0mm top hole-10mm long-stainless steel) QRSO-4MM-12-AL (Quick-release standoff-4.0mm top hole-12mm long-aluminium) QRSO-4MM-8-ZI (Quick-release standoff-4.0mm top hole-8mm long-electro zinc plated steel)

Self-Clinching Quick-Release Standoffs reduce the time and costs associated with traditional assembly methods for panel spaced applications such as mounting and detaching PC boards, panels, or components easily without requiring any tools or additional hardware. This fastener can also reduce or eliminate the risks associated with loose hardware potentially damaging internal circuitry. Utilising a special proven clinch feature, once installed this fastener provides a flush finish on the underside of the panel, meaning that minimal surface finishing is required after installation. Suitable for installation in steel and aluminium panels as thin as 1mm, the quick-release feature is suitable for any panel material from 1.0mm to 1.8mm thick. Like all self clinching fasteners they are installed using a parallel squeezing action, so require access to both sides of the panel. Self-Clinching Quick-Release Standoffs are available in a range of lengths, manufactured from electro zinc plated carbon steel, stainless steel, aluminium and are suitable for installation in ductile panels with a recommended maximum hardness of 60 HRB for steel parts, 70 HRB for stainless steel parts and 50 HRB for aluminium parts.

Dimensional Data Self-Clinching fastener Do’s & Don’ts Self-Clinching fastener problem solving guides Downloadable Data Sheet Back

Installation

Info

Type QRSO

SELF-CLINCHING QUICK-RELEASE STANDOFFS

self-clinching quick-release snaptop standoffs