Broaching Standoffs for Printed Circuit Board

Contact us You can contact us using any of the methods below. Unit 3 Durham Lane Armthorpe Doncaster South Yorkshire DN3 3FE England +44 (0)1302 836010 +44 (0)1302 831555 sales@npfasteners.com

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NORTHERN PRECISION LTD

Specialist Fasteners for Sheet Metal

+44 (0) 1302 836010

+44 (0) 1302 831555

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sales@npfasteners.com

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Installation Method & Performance

Performance

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

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.

First prepare the specified hole in the panel. Place the fastener in the anvil with the shank facing up like in the diagram above. Locate the panel mounting hole over the shank of the fastener. Ensuring the panel is held level, apply a parallel squeezing force until the shoulder of the fastener is seated against the panel. Do not over squeeze the fastener into the panel as this will result in panel deformation or damage. When installing broaching fasteners, please pay attention to the minimum hole centreline to edge and parent material hardness limitations.

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

A ±0.05

7.23

5.79

8.97

Thread or Thru-hole

M3.5|3.60

M3|3.30

M4|4.20

Anvil Dimensions

Thread or Thru-hole

M4|4.20

Installation (kN)

2.1

2.2

2.8

Pull-out (N)

285

420

430

Torque-out (Nm)

1.6

3.5

4.4

Test Sheet Material

1.6mm FR4 Epoxy Laminate

M3|3.30

M3.5|3.60

All performance figures are averages obtained over a range of installations and should be used for guidance 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.

Material & Finish

Electro Tin Plated Steel (ET) Stainless Steel (A2) Maximum recommended panel hardness: 60HRB

Part Number Examples

Part number is made up as follows: (Type)-(Thread code or Thru-hole)-(Length)-(Material/Finish code) For example: CBSO-M3-8-ET (Broaching Standoff-M3-8mm long-electro tin plated steel) CBSO-3.6-10-A2 (Broaching Standoff-3.6mm thru-hole-10mm long-stainless steel)

Downloadable Data Sheet Back

Dimensional

Thread size

M3 x 0.5

M3.5 x 0.6

M4 x 0.7

Min. panel thickness

1.53

C ±0.08

4.68

5.87

6.86

Min. CL to edge of panel

4.40

5.50

7.10

Hole size +0.08 -0.0

4.22

5.41

6.40

S Max.

1.53

D ±0.13

5.56

7.14

8.74

Thru-hole +0.10 -0.08

3.30

3.60

4.20

Info

Broaching standoffs provide strong reusable threads or thru-holes in a spacer format in non-ductile materials such as printed circuit board, polycarbonate, acrylic, glass epoxy and resin laminate components as well as ductile panels with a maximum hardness of 60HRB. Featuring an axially knurled shank, the serrations are designed to cut into the panel material as it is installed, resulting in an interference fit that offers good torque-to-turn resistance and pull-out performance. Installation is simple, prepare the specified hole and using a flat punch and appropriate anvil, apply a parallel squeezing force to press the part into the hole. When installing in printed circuit board, broaching standoffs are suitable for use in non- plated holes only. Available in metric thread and thru-hole sizes in electro tin plated steel and A2 stainless steel, broaching standoffs are suitable for installation in panels with a maximum hardness of 60HRB.