Giunto flessibile a ganasce NM 168
NM 168 reference model with 28-75 mm bore range, 4000 rpm maximum reference speed, and forged-iron hub construction shown in the supplied reference page. Final bore, keyway and duty require confirmation.
NM 168 carries 59.5 Kg*m normal torque and 125 Kg*m maximum torque in the supplied table, with a 4,000 rpm maximum reference speed. The listed bore range is 28-75 mm, outside diameter 168 mm, distance L 88 mm and approximate weight 19.30 kg. This size should be treated as a complete drive-interface review rather than a simple bore match.
- High-load reference normal torque 59.5 Kg*m
- Listed bore ceiling 75 mm
- Approximate mass 19.30 kg
- Alignment quality is a reliability input
- Describe shock/jam events in the RFQ
High-Load Interface
The NM 168 figures are kept for model matching. Larger-frame decisions should also include transient load, shaft geometry, alignment quality and handling constraints.
| Modello | Normal Torque (Kg*m) | Max Torque (Kg*m) | Max RPM | Bore Min (mm) | Bore Max (mm) | Boss D (mm) | Outside OD (mm) | Distance L (mm) | Space S (mm) | Approx. Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|
| NM 168 | 59.5 | 125 | 4000 | 28 | 75 | 124 | 168 | 88 | 3.5±1.5 | 19.30 |
Flexible Center Member
The reference architecture remains a forged-iron hub pair separated by a flexible jaw element. At NM 168 scale, shaft reactions created by poor alignment can become an important reliability concern even when the coupling itself appears robust. The flexible element is not a substitute for correcting machine geometry, and its exact compound still needs confirmation for the actual temperature and media exposure.
Load And Alignment
For NM 168, combine torque, rpm, shaft dimensions and alignment quality in the same review. A 75 mm bore may fit the reference window, but the shaft key and hub section still need engineering approval. Likewise, the 125 Kg*m maximum figure should not be treated as continuous capacity. Describe starts, stops, process shocks and any expected overload so the normal operating basis can be separated from occasional peaks.
Heavy-Hub Installation
Use appropriate handling for the roughly 19.30 kg reference assembly and keep the hubs supported during positioning. Check shaft shoulders, keys and fits before moving heavy components into place. Align the driver and driven equipment accurately, verify the specified space S and rotate the system by hand when practical. Maintenance should watch for progressive element wear, fretting at the shaft fit and vibration trends.
Duty Profile
NM 168 can be considered for substantial industrial drives only after the actual load profile is known. Pumps, compressors, process machinery and other equipment may present different shock and alignment behavior even at similar power. Send operating cycles, speed, motor data and driven-machine description. If the installation is outdoors or contaminated, include environmental details for material review.
Project Machining
Project options can include finished unequal bores, keys, fit classes, identification and special finish requests. If the proposed bore approaches the upper reference value or the shaft uses an unusual key, send a drawing early. A dimensional change that affects hub strength should be reviewed before price is treated as final.
RFQ Scope
For NM 168, quotation quality improves when the buyer identifies whether the unit is a one-off replacement, approval sample or recurring production item. Include expected batch quantities and any documentation requirement so machining, inspection and packing can be planned together.
Frequently Asked Questions
Why does alignment matter on NM 168?
A larger coupling can still transmit unwanted shaft reactions when machines are poorly aligned. Treat alignment as an installation requirement rather than assuming the flexible element will absorb a permanent setup error.
Can a 75 mm shaft automatically use the listed maximum bore?
No. The reference range is a screening value. Keyway geometry, fit and remaining hub section must still be checked on the final drawing.
What duty information is most useful?
Provide normal and peak torque if known, running speed, starts/stops, driven-machine type and any shock or jam condition. A short cycle description is often enough to identify missing data.
What should be planned for handling?
Use handling methods suitable for the actual finished component and protect shaft fits during positioning. The table weight is approximate, so verify the delivered part before lifting planning is finalized.
Request NM 168 Review
Please include both shaft dimensions, motor power and speed or torque, quantity and application.
