Broaching Studs 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 panel and then locate in the anvil. Ensuring the panel is held level, apply a parallel squeezing force until the head 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. Broaching studs do not install flush (refer to A dimension). When installing broaching studs, please pay attention to the minimum hole centreline to edge 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.

E ±0.08

4.10

3.10

Thread code

Anvil Dimensions

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.

L dimension min.

5.10

Installation (kN)

1.7

1.8

1.9

Push-out (N)

280

350

400

Torque-out (Nm)

0.8

1.8

1.9

Test Sheet Material

1.6mm FR4 Epoxy Laminate

Thread code

Max. nut tightening torque (Nm)

0.45

1.6

2.1

Material & Finish

Electro Tin Plated Phosphor Bronze (ET) Maximum recommended panel hardness: 55HRB

Part Number Examples

Part number is made up as follows: (Type)-(Thread code)-(Length)-(Material/Finish code) For example: CBFH-M4-10-ET (Broaching Stud-M4-10mm long-electro tin plated phosphor bronze)

Downloadable Data Sheet Back

Dimensional

Thread size

M3 x 0.5

M4 x 0.7

Hole size +0.08

3.00

4.20

B Max.

1.65

A ±0.13

0.51

C Max.⁽¹⁾

2.30

Min. panel thickness

1.53

D ±0.25

4.58

5.74

M5 x 0.8

5.00

1.65

Min. CL to edge of panel

3.80

5.10

5.30

0.51

2.30

1.53

6.60

Max. hole in attached parts

3.70

4.80

5.80

(1) Threads are gaugeable to within 2 pitches of this dimension.

Info

Broaching studs provide strong male threads 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 55HRB. Featuring an axially knurled ring, 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 push-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 studs are suitable for use in non-plated holes only. Available from stock in various metric thread sizes and lengths in electro tin plated phosphor bronze, broaching studs are suitable for installation in panels with a maximum hardness of 55HRB.