Shot blasting maintenance should follow the installed equipment documentation, operating duty and observed condition. The five areas below help organize the program. They do not establish universal replacement intervals, lubricant grades or service-life promises.
1. Inspect Wear Components Against Defined Limits
Identify the actual wheels, nozzles, control components, liners, seals and handling parts. Use the manufacturer's inspection method and permitted wear limits. Record chipping, damage, leakage, abnormal vibration and changes in blast pattern.
A visual symptom can have more than one cause. Diagnose abnormal operation before replacing components or changing settings. Plan critical spares from the installed parts list, failure consequences and support arrangements.
Isolate relevant energy and secure moving or suspended components before maintenance. Follow the approved procedure for balancing, alignment and reassembly where applicable.
2. Maintain the Qualified Abrasive Condition
Check the working mix, contamination, replenishment and recovery route. Screens and separators have defined capabilities; they do not automatically remove oil or every contaminant.
Inspect delivery and return equipment for abnormal flow or buildup. A low flow rate is not identical to lower particle velocity, and increasing flow beyond the approved condition is not a universal remedy for slow cleaning.
Base abrasive management on measured condition and the qualified surface result. Avoid fixed hours or reuse counts for all steel shot, glass beads or mineral abrasives.
3. Verify Extraction and Collection
Check the installed system using its specified indicators and inspection procedures. Review filters, ducts, seals, collection containers and relevant fan condition. Pressure differential is useful only when interpreted with the system's design and operating information.
Use approved cleaning and disposal methods that control exposure. Do not adopt general compressed-air blowdown instructions that disperse hazardous dust. Address relevant combustible-dust risks for the processed materials.
Filter replacement and examination intervals should follow documentation and applicable requirements. A collector's presence or a clear-looking chamber does not establish adequate exposure control.
4. Lubricate Only as Specified
Identify each service point and its required lubricant, quantity, method and interval. Some components are sealed or have different lubrication requirements. Over-lubrication or an incompatible product can create problems.
Keep the lubrication chart tied to the actual configuration. Do not apply one grease grade or operating-hour interval to every wheel bearing, motor, gearbox and conveyor component.
5. Record Findings and Verify Corrective Work
| Record | Useful information |
|---|---|
| Inspection | Component, method, condition and acceptance |
| Fault | Symptoms, duty, relevant readings and immediate action |
| Repair | Diagnosis, parts, adjustments and responsible person |
| Release | Functional checks and required process inspection |
| Trend review | Recurring causes and changes in service conditions |
Train operators to report abnormal sound, leakage, flow and surface results through a defined route. Records support diagnosis, but they do not guarantee prediction of every failure.
After work, check protective functions and relevant process performance before release. Update instructions when an approved change alters the maintenance requirement.
Reassess Changes in Abrasive or Product
A new abrasive, substrate, geometry or production duty may change wear and protective requirements. Review compatibility with the complete system and qualify the surface result.
Use maintenance evidence to refine the program. Avoid presenting invented field experience, a fixed performance recovery or guaranteed lower operating cost as the basis for maintenance decisions.
