PCB retainers do not require torque wrench

Enclosures, Racks, Cabinets & Panel Products

10 November 2010 Enclosures, Racks, Cabinets & Panel Products

New from Calmark are the Series 223 and 224 Card-Lok PCB retainers, which incorporate a patent-pending torque-limiting feature that enables a PCB assembly to be fixed into a chassis at a prescribed clamping force without the need for a torque wrench.

Primarily aimed at cold-plate heat transfer applications within the defence and aerospace sector, these new five-wedge devices are designed to prevent damage to the PCB or to the Card-Lok itself due to over-tightening. By turning the centre screw clockwise, the outer wedges are drawn together, forcing the centre wedge sections to expand outwards. When the turning force exerted on the screw reaches the preset torque, the built-in ratchet clutch disengages with an audible click to prevent further tightening.

As well as providing maximum resistance to shock and vibration, the Card-Loks also play a major role in dissipating heat from the PCB. The devices feature a lightweight aluminium construction and can be specified with various finishes, including black anodised, electroless nickel and chemical film. They are available with profiles of either 5,72 x 6,60 mm (Series 223) or 5,33 x 6,99 mm (Series 224) in a wide range of standard lengths from 121,9 to 329,9 mm.

Share this article:

Transporting and storing lithium-ion batteries
Enclosures, Racks, Cabinets & Panel Products
Lithium-ion batteries have become ubiquitous in modern life, but along with their benefits comes a serious challenge: these batteries pose fire and safety risks and are classified as dangerous goods for transport.

Read more...

Non-contact safety door switch
Omron Electronics Enclosures, Racks, Cabinets & Panel Products
OMRON has unveiled its latest innovation in non-contact safety door switches, the D40A-2, designed to enhance workplace safety and streamline machinery operations.

Read more...

Easy installation panel mount assembly
Future Electronics Enclosures, Racks, Cabinets & Panel Products
NKK’s new easy installation Panel Mount Assembly (the BYB201-470) consists of a PCB, resistor, connector, and a straight PC adaptor.

Read more...

RF shield box to 12 GHz
Vepac Electronics Enclosures, Racks, Cabinets & Panel Products
The HDRF-1467-S from RF Electronics has a thick RF-absorbing foam that deadens standing waves and reflections to provide more than 100 dB of isolation.

Read more...

High visibility 4-digit panel ammeters
Electrocomp Express Enclosures, Racks, Cabinets & Panel Products
The MP-335PAS-1 is a 4-digit 7-segment red display ammeter with a measurement range of 4 to 20 mA and a very low power consumption.

Read more...

Multi-channel SMPS cable assemblies
RFiber Solutions Enclosures, Racks, Cabinets & Panel Products
Withwave’s multi-channel SMPS cable assemblies (WMCS Series) provide a wide range of multiple coaxial connectors and flexible cable assemblies with a choice of 26,5, 40, 50 and 67 GHz configurations.

Read more...

Building the control panels of the future
Omron Electronics Enclosures, Racks, Cabinets & Panel Products
The industrial automation world is built on robust and efficient control panels that are designed precisely and assembled to manage machines, processes and equipment across different industries.

Read more...

What’s the big deal with DPL?
Spectrum Concepts Enclosures, Racks, Cabinets & Panel Products
The dynamic performance layer (DPL) forms a key part of the construction of Nitrowave coaxial cables, Samtec’s range of high-performance RF solutions for microwave and mmWave applications.

Read more...

Flexible and high-density heat rejection system
Enclosures, Racks, Cabinets & Panel Products
The introduction of the Vertiv CoolLoop Trim Cooler supports air and liquid cooling applications for high-performance computing.

Read more...

Categories

Enclosures, Racks, Cabinets & Panel Products

PCB retainers do not require torque wrench

Further reading:

Publications by Technews