You are here: Rivet Nut Gun Common Faults and Installation Problem Troubleshooting - BISUDI
Rivet nut gun faults look varied, but troubleshooting actually follows a fixed order: check the air circuit first, then wear parts such as screw and rivet head, then verify nut specification and pre-drilled hole, and finally check the operation actions. This article lists common faults, causes and remedies in two stages of installation/commissioning and production use, so the workshop can self-check against the table.
I. Common faults during installation and commissioning
| Symptom | Common Cause | Remedy |
|---|---|---|
| No action when triggered | Air source not connected, zero air pressure, emergency stop not reset, loose wiring | Check air source, switch, emergency stop and connectors one by one |
| Weak action, cannot bulge | Air pressure below specified value, air hose too thin or long, triple unit pressure not regulated | Adjust air pressure per manual, troubleshoot air leaks, ensure pump displacement |
| Nut cannot screw onto screw | Screw specification inconsistent with nut, screw broken teeth, feed channel misaligned | Verify specification, replace screw, adjust channel |
| Continuous jamming | Nut burrs/deformation, vibratory bowl not cleaned, channel not changed on specification switch | Pick out defects, clean bowl, change channel per specification |
| Air leak and abnormal noise | Seal ring not seated or aged, loose connector | Reinstall or replace seal ring, tighten connectors |
II. Common faults during production
| Symptom | Common Cause | Remedy |
|---|---|---|
| Nut slips and follows rotation | Smooth nut used in round hole, hexagonal nut not matched with hexagonal hole, hole too large | Match hole to nut type, choose hexagonal/knurled anti-slip type if needed |
| Uneven bulge, looseness | Insufficient stroke/pulling force, plate thickness out of range, gun head not seated | Adjust stroke/pulling force, verify riveting range, seat gun properly |
| Plate depression, coating crush | Excessive pulling force, rivet head type mismatch, angled gun | Reduce pulling force, change matched rivet head, seat gun vertically |
| Screw cannot withdraw, damaged threads | Screw wear/broken teeth, nut not fully formed, insufficient lubrication | Replace screw, oil per spec, do not force reverse |
| Thread go/no-go fail | Nut follows rotation, screw wear, mixed specifications | First-article go/no-go inspection, replace worn parts, manage by specification |
| Gets weaker with use | Continuous work outruns air supply, insufficient pump reserve, water accumulation | Increase pump displacement, drain triple unit, test before shift |
III. Key steps for installation and specification change
For new machine installation, first confirm on-site air pressure and volume meet the manual requirements, then install the screw and rivet head of the matching specification; when changing nut specification, the screw, rivet head and feed channel must all be replaced together and the feed direction confirmed; after each changeover or nut batch switch, do first-article inspection: rivet 3-5 pieces consecutively, check bulge, plate surface and thread go/no-go, and only proceed to mass production after passing. Installation and commissioning are generally done on-site by the manufacturer with synchronized training; customers are not advised to disassemble the cylinder and motor parts themselves.
IV. When to contact the manufacturer
Do not force through the following situations: continuous thread stripping or inability to withdraw after replacing screw and rivet head; abnormal noise inside cylinder or motor, or disordered action sequence; multiple devices showing the same defect simultaneously (may be a nut batch or hole diameter problem, requiring on-site determination of the responsible step). When reporting repair, keep fault videos, nut specification and pre-drilled hole dimensions, which can significantly shorten diagnosis time. Nationwide customers receive on-site repair from the manufacturer; for maintenance and parts seeHow to Maintain Automatic Rivet Nut Guns。
Troubleshooting FAQ
Repair FAQ
First check whether the hole diameter and plate thickness at that point are out of tolerance; many "equipment faults" are actually workpiece or incoming nut problems, so it is recommended to classify and retain samples of defects.
Pressure gauge reading does not equal flow; an overly long or thin hose, throttled connectors or insufficient pump displacement all cause instantaneous pressure drop during riveting, which must be measured at the moment of triggering.
Forced twisting is not advised, as it easily damages the gun body and threads; release pressure and retract per manual, and contact after-sales if it cannot be handled.
The manufacturer serves nationwide and schedules on-site visits by appointment; the exact time is confirmed when reporting repair.
Rivet nut gun fault? Nationwide on-site repair available
Providing fault diagnosis, original screw/rivet head parts and on-site repair, consultation hotline +86 13556668682.
V. On-site management for fault prevention
Over 80% of "equipment faults" can be prevented in advance through on-site management. First, establish a per-shift inspection sheet, checking and signing off air pressure, air leaks, screw condition and first-article results item by item; second, do incoming inspection of nuts and sheet metal holes, so workpieces with burrs, out-of-tolerance holes or mixed specifications do not flow to the riveting station; third, stock wear parts by specification in fixed locations with usage registration; fourth, changeover must execute the three steps of "change screw/rivet head/channel - adjust program - confirm first article", and production from memory is not allowed; fifth, new workers must complete operation and anomaly reporting training before taking post, and stop the machine and report to the team leader immediately upon two consecutive defects rather than continuing. These actions add no equipment cost but minimize line stoppage time.
The main unit carries a 1-year warranty, and non-human-caused quality problems are handled per agreement; nationwide customers can contact the manufacturer, and on-site visits are arranged when phone guidance cannot solve the problem. Providing fault videos and the equipment serial number when reporting repair speeds up handling.
Further reading:Maintenance Items, Cycles and Wear Parts · Through-hole and Blind-hole Operation Points · Automatic Rivet Nut Gun
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