Notice from Japan Forming Machinery Association

Recommendations for Preventive
Maintenance of Metal Forming andFabricating Machines
Failure to perform proper maintenance may cause yourmachine to unexpectedly stop and hinder your production.
Periodic maintenance will ensure safe performance of machines for extended periods of time andminimize any occurrence of failure.

Sudden andUnpredictable
Accidents

AbnormalPhenomena

Stop Position
Slippage

SuddenFailureLet’s enjoy high returns from the maximum
performance and stable operation of your machine.
Principles of Preventive MaintenanceElectricalParts

Be sure to replace electrical parts such as relays, switches, motors, electromagnetic valves andemergency stop buttons with only those parts designated by the manufacturer.

MechanicalParts

Be sure to replace mechanical parts such as clutch brakes, couplings for encoders, O-rings,
V-belts and lubricating oils with only those parts designated by the manufacturer.

Are you familiar with “The Bathtub Curve” as a rule-of-thumb to estimate
the service life of your machine?
- Perform the statutory “Pre-Operation Inspection” to detect any
abnormalities and take early countermeasures as required.

HighEarly Failure
PeriodRandom Failure
PeriodWear-Out Failure
Period- Every part has a service life. Be sure to perform daily inspections andm a i n t e n a n c e i n o r d e r t o l e n g t h e n t h e e ff e c t i v e p r e v e n t i v emaintenance period.

FailureRate- It is important to replace parts before the expiration of their“Recommended Replacement Interval” which is provided by themanufacturer as a rough estimate of the service life of their parts.

Low
0Elapsed Time

Effective Period ofConducting Preventive
MaintenanceEnsuring preventive
maintenance is a cornerstone ofstable business management.
It is essential to perform sufficient inspections and maintenance and to monitor theperformance of machines so that the machines may perform at their maximum capacityand maintain high utilization rates.

１Ｗ

１Ｄ

Daily Inspection
and MaintenanceWeekly Inspection
and Maintenance

Perform daily inspection and maintenance before beginning operating
and when changing dies/molds (orduring shift changes in 24-hour
operations).

６Ｍ
Biannual Inspection
and MaintenanceInspect and maintain in accordance withthe biannual procedure.

MaintenanceAction PlanP lan（1）Produce an action plan
- Prepare a maintenanceaction plan timetable.
- Acquire consumables
and maintenance parts inadvance.
（2）Make a checklist of
inspection items andcriteria for judgment inorder to avoid anyomissions.

１Ｍ

Monthly Inspection
and MaintenanceInspect and maintain in accordance withthe weekly procedure.

１Ｙ
Annual Inspection

Inspect and maintain in accordance withthe monthly procedure.

３～５Ｙ

and Maintenance

3~5-Year Overhaul andMaintenanceInspect and maintain in accordancewith the annual procedure.

Overhaul and maintain in accordancewith the 3~5-year overhaul andmaintenance.

Maintenance
Implementation

Do（1）Perform inspections inaccordance with thechecklist.
（2）Maintain records of thestatus before parts
replacement and thecondition of thereplacement parts.
（3）Replace those parts thathave come to their life andmaintain in accordancewith the plan.

Prepared and issued by

Japan Forming Machinery Association
Kikaishinko Bldg. 3-5-8 Shibakoen, Minato-ku,
Tokyo, Japan
Tel: 03-3432-4579 ／ Fax: 03-3432-4804

http://www.j-fma.or.jp

Confirm theEffectivenessof the MaintenanceFeed Back to the
Maintenance PlanActCheck（1）Confirm any
before-and-afterimprovement.
（2）Review failure anddowntime frequency
records as part of yourimprovement activities.

（1）Review “Plan, Do, andCheck” results, and clarify
points for improvement.
（2）Feed back to themaintenance plan of any
improvement measuresresulting frommaintenance details.

For further information, please contact: