NM Coupling FAQ
Answers below focus on the information needed for B2B model matching, customization and quotation. For a final selection, provide the real machine duty and an approved drawing.
What information is required for selection?
Provide motor power and speed or transmitted torque, both shaft diameters and keyways, application, start/stop or shock conditions, ambient environment and available installation space.
Why are both torque and bore checked?
A coupling can be torque-capable but still unsuitable for the required shaft diameter, or bore-capable but undersized for the duty. Both limits must be reviewed.
Can I customize the bore or keyway?
Custom bore, keyway and fit requests can be evaluated against hub geometry. Release the final machining only after the drawing is confirmed.
Which material is used for the NM hubs?
The supplied reference page labels the NM coupling hub as forged iron. Any alternative material request should be treated as a project-specific requirement.
What is the flexible element material?
The exact element compound is not identified in the supplied reference table. State temperature, oil/chemical exposure and duty so the element specification can be confirmed.
Can I buy 1-5 pcs samples?
New clients can request 1-5 pcs samples at sample pricing, subject to the model and process requirements.
Can different models be combined?
Mixed-model orders can be reviewed together, with USD 1,500 used as a practical order-value target in the site order reminder.
Are 1-2 pcs orders accepted?
Very small quantities may carry a higher unit cost. Special-case projects are welcome for evaluation rather than being rejected automatically.
How should I check installation?
Confirm shaft cleanliness, hub position, alignment, element seating, hub spacing and fastening. Investigate repeated wear or abnormal heat/noise instead of only replacing the element.
Do you publish stock or delivery-time promises?
No fixed stock or lead-time claim is published. Quotation should reflect the model, machining, process and quantity required for the actual order.
