Parameters for drilling and slot drilling, conditions for Drilling in the chart are available.
Terms | Major units | Meanings and formula |
---|---|---|
Spindle speed | rpm | Number of revolution per minute |
Velocity | m/min mm/sec Inch/min(IPM) Feet/min(SFM) |
Velocity of periphery V=π·D·N / 1000 V: Velocity [m/min] D: Drill bit diameter [mm] N: Number of revolution per minute [rpm] SFM: Surface feet per minute 1m/min = 3.28 Feet/min |
Infeed rate | m/min mm/sec Inch/min(IPM) |
Vertical speed of drilling |
Chipload | µm/rev Mil/rev |
Feed amount per revolution f =F/N x 1,000,000 f :Chipload [µm/rev] N:Number of revolution per minute [rpm] F:Infeed rate [m/min] |
Retract rate | m/min mm/sec Inch/min(IPM) |
Retract speed after drilling |
Depth into back-up board | mm Inch |
Penetration depth into back-up board. Too Shallow causes a risk of not drilling through the PCB. And too deep can cause registration accuracy, roughness, and breakage problems. |
Hits | - | Life of drill bit. This parameter table shows the general values inputted into drilling machine. |
Repoint (Number of repoints) | - | Generally, the tip of drill bit is repointed after use, having deteriorated through wear. This parameter table shows the general information for repointing frequency. |
Stack height | - | To improve productivity the PCB is often stacked up for drilling. This parameter table shows the general number of panels per a stack for each general PCB thickness. |
Distance | 1m = 1000mm = 39.37Inch 1Inch = 0.0254m = 25.4mm |
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Velocity, Infeed rate, Retract rate | 1m/min = 16.67mm/sec = 39.37Inch/min = 3.28Feet/min(SFM) 1mm/sec = 0.06m/min = 2.36Inch/min 1Inch/min = 0.0254m/min = 0.423mm/sec |
Chipload | 1µm/rev = 0.0393Mil/rev 1Mil/rev = 25.4µm/rev |
PRODUCT 01 PCB Drills / Routers / Ultra precision micro-hole drill