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Drill and Hole Sizes

QA Technology recommends that the PG (Pin Gauge) tools be used to verify the hole size before installing sockets/terminations pins. The recommended drill sizes shown are based on the standard drill sizes available for the product Series listed. Due to the tolerances of purchased drill bits, which can be undersized by 0.0005 [0.0127] or more some of the drill sizes recommended are above the listed range. In addition the machine feed rate, RPM, peck frequency, material used, drill wear, hole taper and other variables can also affect the finished hole size. Holes that are either undersized or oversized will not pass the GO/NO-GO PG tool (pin gauge) when tested. Undersized holes could result in damaged sockets/terminations and installation tools while oversized holes could result in loose sockets/terminations where the Set-Heights are not maintained. For new applications, drilling of sample fixture plates and testing is always recommended.

Conventional Series

Series

Hole Specification

Suggested Drill Size

Pin Gauge

025-16 .0205/.0215 [0.521/0.546] #75 or .55mm PG25

039-16
039-25
039-40

.0307/.0317 [0.780/0.805] .8mm or #67 PG39

050-05
050-16

.0368/.0378 [0.935/0.960] .95mm or #62 PG050-05/16

050-T25
050-T40
050-R25
050-R40

.0380/.0390 [0.965/0.991] 1.0mm

PG050-25

075-25
075-40

.0530/.0550 [1.346/1.397] #54 or 1.4mm PG75

100-05
100-16
100-25
100-40
100-50

.0670/.0690 [1.702/1.753] 1.75mm PG100

125-25

.0940/.0960 [2.390/2.440] 2.4mm or #41 PG125

156-25

.108/.110 [2.74/2.79] 7/64" or 2.8mm PG156

187-25

.141/.143 [3.58/3.63] 3.60mm PG187


  X Probe Socketless Series

Series

Fixture Plates

Suggested Hole Size

Suggested Drill Size

Pin Gauge Tools

X31-16
X31-25
X31-40

Probe Plate .0250/.0260 [0.635/0.660] #71 or .65mm PG-X31-P
Opt. Spacer Plate .027 [0.686] min .7mm or #70  
Back Plate .0217/.0225 [0.551/0.572] #74 or .58mm PG-X31-T

X39-16
X39-25
X39-40

Probe Plate .0315/.0325 [0.800/0.826] #66 or .84mm PG-X39
Opt. Spacer Plate .034 [0.860] min #65 or .90mm  
Back Plate .0315/.0325 [0.800/0.826] #66 or .82mm PG-X39

X50-16
X50-25
X50-40

Probe Plate .0415/.0430 [1.054/1.092] #57 or 1.1mm PG-X50-P
Opt. Spacer Plate .045 [1.14] min 1.15mm or #56  
Back Plate .038/.039 [0.965/0.990] #61 or 1mm PG-X50-T

X75-16
X75-25
X75-40

Probe Plate .0545/.0560 [1.384/1.422] #54 or 1.40mm PG-X75A-P
Opt. Spacer Plate .0625 [1.59] min 1/16 or 1.6mm  
Back Plate .0515/.0525 [1.308/1.333] #55 or 1.35mm PG-X75A-T
Wireless Back Plate .038/.039 [0.965/0.990] #61 or 1mm PG-X50-T