Product Introduction
When a rotating machine loses its vibration probe, unplanned downtime follows quickly. The Bently Nevada 330172-05-63-05-02-CN is a 3300 5mm proximity probe engineered for direct replacement in existing 3300-series monitoring systems. This armored, 1/4-28 UNF threaded probe delivers reliable shaft vibration and position measurement, helping maintenance teams restore protection without re-engineering the installation.
Technical Specifications
The table below lists verified data for the Bently Nevada 330172-05-63-05-02-CN. Confirm thread type, cable length, and connector before you order.
| Parameter |
Value |
| Product Type |
330172 3300 5mm Probe, 1/4-28 UNF thread, with armor |
| Made In |
U.S.A. |
| Unthreaded Length |
0.5 in |
| Overall Case Length |
6.3 in |
| Total Length |
0.5 m (1.6 ft) |
| Connector Option |
Miniature coaxial ClickLoc connector, standard cable |
| Agency Approval |
CN (Country Specific) |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 303 or 304 stainless steel (SST) |
| Probe Cable |
75 Ω triaxial, FEP insulated, 0.5 m |
| Probe Case Thread |
1/4-28 |
| Max Thread Engagement |
0.375 in |
| Weight |
0.323 kg |
| Power Supply |
-17.5 Vdc to -26 Vdc, 12 mA maximum consumption |
| Sensitivity |
Less than 2 mV change per volt change in input voltage |
| Output Resistance |
50 W |
| Probe DC Resistance (0.5 m) |
7.45 ± 0.50 Ω |
| Tensile Strength |
222 N (50 lbf) |
| Connector Material |
Gold-plated brass or gold-plated beryllium copper |
| Probe Case Torque |
5.1 N·m recommended, 7.3 N·m maximum |
| Connector-to-Connector Torque |
Maximum 0.565 N·m |
| Minimum Cable Bend Radius |
25.4 mm (1.0 in) |
| Probe Temperature Range |
-35°C to +177°C (-31°F to +351°F) |
Key values for replacement planning:
- Requires -17.5 Vdc to -26 Vdc at 12 mA maximum consumption.
- Probe DC resistance is 7.45 ± 0.50 Ω for the 0.5 m cable.
- Probe case torque: 5.1 N·m recommended, 7.3 N·m maximum.
- Keep the cable bend radius above 25.4 mm.
Typical Installations
The Bently Nevada 330172-05-63-05-02-CN is built for 3300-series proximity transducer systems that monitor shaft vibration and axial position. In turbine, compressor, and pump trains, this 5mm probe mounts with the tip facing an AISI 4140 steel target. The 60 Hz magnetic field effect data for a 5-meter system shows low output voltage influence across 10, 50, and 90 mil gaps, which means the probe delivers stable readings in electrically noisy environments.
Installation & Setup Guidance
Drill and tap the mounting hole with a #3 or larger tap drill for the 1/4-28 thread. Keep thread engagement at or below 0.375 in. Tighten the probe case to 5.1 N·m recommended, never beyond 7.3 N·m. For the miniature coaxial ClickLoc connector, apply no more than 0.565 N·m. Position the probe tip at the nominal reference gap of 1.27 mm (50 mils) for alignment with the steel target.
Maintenance & Reliability
Inspect the Bently Nevada 330172-05-63-05-02-CN for cable wear, connector tightness, and probe tip condition during scheduled outages. Keep the cable bend radius above 25.4 mm. Do not expose the probe below -34°C; the pressure seal may fail prematurely. The -35°C to +177°C operating range suits most industrial environments.
Selection Guide & Purchasing Advice
Verify that your application calls for the 0.5 in unthreaded length, 6.3 in overall case length, and 0.5 m total cable length. This configuration uses a miniature coaxial ClickLoc connector with standard cable and carries CN agency approval. For a dependable supply of the Bently Nevada 330172-05-63-05-02-CN, contact PLC Source PRO with your exact part number.