Name: 27474-02 Bently Nevada Mounting Bracket | Phenolic, for Generator &amp; Motor Bearings
SKU: 27474-02
Price: 234.00 USD
Availability: InStock

Product details

Product Overview

Bently Nevada 27474-02 is a phenolic mounting bracket. It provides electrical isolation for probes. This bracket suits generator and motor bearing locations. It works with 3300 and 3300 XL systems.

Key Features

Phenolic material – offers extra electrical isolation
Thread option – 1/4-28 UNF-2B (27474-02)
Includes – two 10-24 UNC-2A mounting screws with safety wire holes
Dimensions – identical to aluminum bracket 137492
Made in USA

Technical Specifications

Manufacturer: Bently Nevada
Product No.: 27474-02
Type: Phenolic Mounting Bracket
Thread option: 1/4-28 UNF-2B
Supplied screws: 10-24 UNC-2A (two, with safety wire holes)
Material: Phenolic (thermoset plastic)
Compatible probes: 5 mm, 8 mm, and NSv™ probes
System compatibility: 3300 and 3300 XL proximity probe systems

Installation & Mounting Details

Standard use: Use 137492 aluminum bracket for most installations
Clamping action: 137491 brackets compress probe hole to lock probe gap
Isolation need: Choose 27474 when electrical isolation is required
Mounting screws: included 10-24 screws have safety wire holes
Torque: tighten screws to 1.5 N·m (13 in-lb) maximum

Expert Review

“The 27474-02 phenolic bracket solves isolation issues in generator bearings. Its non-conductive body prevents ground loops. I recommend it for any 3300 XL probe installation where electrical noise is a concern.” – Senior Field Service Engineer

Manager’s Insight

“We use this bracket on all our motor bearing monitors. It reduces false readings from stray currents. The safety wire holes add security in high-vibration areas. A smart upgrade over aluminum for critical assets.” – Plant Reliability Manager

Applicable Equipment & Use Cases

Generators: turbine-driven generators with bearing monitoring
Electric motors: large AC/DC motors requiring isolated probes
Compressors: where electrical isolation is specified
Pumps: critical process pumps with proximity probes
Fans: induced draft fans with bearing vibration monitoring

Comparison with Similar Models

137492 (aluminum): standard non-isolated bracket, same dimensions
137491 (clamping): for 3/8-inch smooth case probes, locks gap by compression
27474-02 (phenolic): provides electrical isolation, includes screws with safety wire holes
For more options, visit PowergearX

Frequently Asked Questions (FAQ)

Q: When should I use the 27474-02 instead of 137492?
A: Choose 27474-02 when you need electrical isolation from the mounting surface. Use 137492 for standard non-isolated installations.
Q: Does this bracket fit 3300 XL 8 mm probes?
A: Yes, it works with 5 mm, 8 mm, and NSv probes in the 3300 and 3300 XL systems.
Q: Are the mounting screws included?
A: Yes, two 10-24 UNC-2A screws with safety wire holes come with the bracket.
Q: Can I use this bracket in a high-temperature area?
A: Phenolic material withstands up to 120 °C (248 °F). For higher temperatures, use metal brackets.
Q: How do I prevent the bracket from loosening?
A: Use the safety wire holes to lock the screws. Apply medium-strength threadlocker for extra security.

Experience-based Tips & Selection Guidance

Tip 1: Always check for ground loops when using non-isolated brackets. The 27474-02 solves this.
Tip 2: For 3/8-inch smooth case probes, consider 137491 clamping bracket instead.
Tip 3: Safety wire the screws in high-vibration environments to prevent back-out.
Selection guide: If your application has electrical noise or bearing currents, pick 27474-02. For standard machinery, choose 137492 aluminum.
Alternative: For clamping action on smooth probes, use 137491 – not covered here.