Description
When mounting heavy-duty seismic vibration sensors onto a gas turbine housing or a cooling tower fan gearbox, the mechanical interface is everything. The Bently Nevada 125094-01 is a premium hex plate mounting adapter stud machined from 300-series stainless steel. It transitions a standard 3/8-24 UNF fine thread on the transducer side to a metric M8 × 1 thread on the machine casing side, allowing seamless installation of US-standard instruments onto metric machinery without field-tapping the bearing housing.
We maintain ready-to-ship stock of this mounting hardware to support urgent turnaround and installation schedules worldwide.
Commercial Availability & Logistics Terms
- Condition: Brand New, Factory Original
- Availability: In Stock
- Standard Lead Time: 1–3 business days for global shipping processing
- Warranty: 12-month full replacement warranty
- Price Notice: Pricing listed across online B2B marketplaces represents a spot market baseline. Final item cost depends on total order volume, regional import compliance overhead, and active freight pooling agreements. Please contact our trade desk for an explicit quotation.
Technical Specifications
| Parameter | Value |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Part Number | 125094-01 |
| Component Type | Hex Plate Mounting Stud / Thread Adapter |
| Transducer End Thread | 3/8-24 UNF (Fine Thread) |
| Machine Casing End Thread | M8 × 1 (Metric Fine) |
| Stud Engagement Length | 8.3 mm (0.325 in) |
| Hex Plate Width Across Flats | 1-3/8 in (34.9 mm) |
| Material Construction | 300-Series Corrosion-Resistant Stainless Steel |
| Recommended Torque | 4.5 N·m ± 0.6 N·m (40 in·lbf) |
| Net Shipping Weight | 0.15 kg (Packaged weight may vary slightly) |
Compatibility & Field Operational Insights
In field deployments of seismic monitoring hardware, engineers often overlook the physical geometry of the mounting base. The 125094-01 is explicitly designed as a matching accessory for high-performance transducers like the Bently Nevada 190501 Velomitor CT and the 20015x Trendmaster series accelerometers. When your system configuration code dictates a metric casing attachment interface (such as Option A12 on a Velomitor spec sheet), this exact stud is the factory-specified solution.
Don’t let the simplicity of a piece of threaded hardware fool you—improper installation ruins data collection. To be frank, if the machine surface isn’t spot-faced flat to accommodate the 1-3/8 inch hex flange, the sensor will cross-thread or sit crooked. This design choice is actually clever because the wide flat hex plate dampens parasitic transverse vibrations, ensuring that high-frequency acoustic energy transmits cleanly into the sensor crystal. Well, technically it can be snugged down with a standard crescent wrench, but to preserve the sensor’s calibrated frequency response above 5,000 Hz, you must apply exactly 4.5 N·m of torque using a calibrated click-type torque wrench.
Global Trade, Shipping, and Customs Compliance
Global trade done right creates competitive advantage. Moving small-scale precision mechanical adapters across borders requires exact paperwork to eliminate unnecessary holding times.
- Harmonized Tariff System Code: This product is classified under HS Code 7318.15.80 (Screws and bolts, whether or not with their nuts or washers, of iron or steel, threaded).
- Documentation & Logistics: Standard trade lanes are processed via EXW (Ex Works) or CIP (Carriage and Insurance Paid to) air cargo networks. All line items are tracked with clear commercial invoices showing exact country of origin and clean net weights in kg.
- Express Delivery: Packaged securely within oil-resistant, sealed bags inside heavily padded envelopes to prevent thread marring or oxidation during global flight transits via DHL Express, FedEx, or UPS.
Frequently Asked Questions
Can I use this stud on standard M8 × 1.25 coarse-threaded machine casings?
No, you cannot. The machine end of the 125094-01 is explicitly cut to an M8 × 1 metric fine thread pitch. Forcing this stud into a standard metric coarse M8 × 1.25 tapped hole will instantly gall and ruin the internal threads of your bearing housing. Always verify the pitch of your casing hole with a thread gauge before mounting.
Why is a stainless steel hex plate preferred over a simple grub screw adapter?
A simple dual-threaded grub screw does not provide an adequate flat parallel seating plane. The wide 1-3/8 inch hex plate of the 125094-01 acts as a rigid coupling base that ensures uniform contact across the machine housing face, which prevents signal distortion and keeps the transducer’s internal sensing axis perfectly perpendicular to the shaft centerline.
What model of vibration sensor or bearing housing profile are you preparing to mount with this metric fine stud? If you have an urgent overhaul timeline or need targeted customs compliance paperwork sorted out for your region, share your project specifics below.
