Drill and Hole Sizes

QA Technology highly recommends that holes initially drilled in fixture plates be verified using pin gauge tools (PG Tools) due to the tolerances of purchased drill bits which can be undersized by .0005 [0.127] or more. The machine feed rate, RPM and material used, can also affect the hole size. Undersized holes will not pass go-no-go pin gauge testing and may create problems when inserting the sockets or termination pins. Therefore, QA Technology strongly suggests the use of pin gauges for hole size verification before attempting installation during the assembly of the fixture.

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] #67 or .80mm PG39

050-05
050-16

.0368/.0378 [0.935/0.960] #63 or .95mm PG050-05/16

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

.0380/.0390 [0.965/0.991] #61 or 1.0mm

PG050-25

075-25
075-40

.0530/.0550 [1.346/1.397] #54 or 1.35mm PG75

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

.0670/.0690 [1.702/1.753] #61 or 1.75mm PG100

125-25

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

156-25

.108/.110 [2.74/2.79] 2.75mm or 7/64" 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

X31-25
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 .57mm PG-X31-T

X39-25
X39-40

Probe Plate .0315/.0325 [0.800/0.826] #66 or .82mm PG-X39
Opt. Spacer Plate .034 [0.860] min .85mm or #65  
Back Plate .0315/.0325 [0.800/0.826] #66 or .82mm PG-X39

X50-25
X50-40

Probe Plate .0415/.0430 [1.054/1.092] #57 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

X75-25
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