Hammer drill
| Symptoms of failure | Affected parts | Method of inspection | Cause of failure | Recommended action | Recommended action |
|---|---|---|---|---|---|
| Operation out of control (disconnected) | Switch | Check the switch ON/OFF and contact (connection) | Mixing in of foreign matter | Cleaning and removing foreign matter | Air cleaning |
| Decrepitude (exceeded the endurance limit) | Exchanging the switch | Exchanging the switch | |||
| Damage due to impact | |||||
| Damage due to fall | |||||
| Point of contact failure | |||||
| Code | Check whether the code is disconnected | Disconnection occurred due to abnormal tension of the part of code clip when moving | Modifying and replacing the code section | Replacing the code | |
| Phenomenon of code being gnawed due to misuse during operation | |||||
| Switch connection | Check whether the switch is connected in order | Lead wire breakaway caused by assembly failure | Reconnecting as shown in the picture connecting failure | Switch connecting picture/exchanging | |
| Connection failure | |||||
| Change lever | Check whether the change lever operated smoothly | External impact | Exchange | Change lever exchange | |
| Damage caused by operation of the change lever during product rotation | |||||
| Retainer | Check whether the retainer operated well | External impact | Exchange | Exchange the retainer | |
| Quality problem of the material | |||||
| Abrasion due to exceeded endurance limit | |||||
| Amateur | Check if the amateur coil is disconnected | Coil burn-out thermic in overload due to excessive operation | Replacing the amateur | Exchanging the amateur | |
| In case of operation exceeding the rated using time | |||||
| Coil damage due to entry of foreign matter | Cleaning and replacing | ||||
| Stator | Check the disconnection/burn-out of the stator coil | Burn-out stator due to overload caused by excessive operation | Replacing the stator | Exchanging the stator | |
| operation exceed the rated using time | |||||
| Coil damage due to entry of foreign matter | Cleaning and exchanging | ||||
| Damage of stator lead wire connection part | |||||
| Carbon brush | Check if the carbon brush is able to connect with the amateur commutator part | Operation exceeding the carbon abrasion limit line | Replacing the carbon brush | Exchanging the carbon brush | |
| Spring operation failure due to assembling failure | |||||
| Amateur commutator part contact failure due to entry of foreign matter into the brush holder | Cleaning and exchanging | ||||
| Interference | Amateur, Stator | Check the amateur and stator for interference | In case the stator's left and right volt clamping force is inappropriate | Modifying and replacing | Exchanging the amateur,stator |
| Spring operation failure due to assembling failure | |||||
| Bearing | In case of bearing abrasion and damage | in case of abrasion and damage due to using exceeded bearing part's endurance limit | Replacing the bearing | Exchanging the bearing | |
| Brush holder | Check if the brush holder is duly reached | Assembling failure | Exchanging | Exchanging the brush holder | |
| Brush holder damage | |||||
| Processed goods | Check the processed goods bearing's duly reaching part for abrasion (gear cover, housing, cylinder case, crank case) | In case of abrasion of bearing injection part due to exceeded endurance limit of each processed good | Separate replacement in case of abrasion on each part | Separate replacement in case of abrasion on each part | |
| Inappropriate bearing injection part's distance between shelves | |||||
| Shaking | Amateur | Check the A/R shaft for bending and puncture | Fan damage and puncture of shaft during repair | Replacing the amateur | Exchanging the amateur |
| Check the amateur fan for damage | Change the shape (environment) | ||||
| Check the balance | Shaft fan injection part knurling brasion | ||||
| Bearing | Check the bearing for wear and damage | In case of bearing wear due to decrepitude | Replacing the bearing | Exchanging the bearing | |
| In case of bearing damage | |||||
| Processed goods | Check the processed goods bearing's duly reaching part for abrasion (gear cover, cylinder case, crank case, housing) | In case each part's processed goods are decrepit | Separate replacement in case of abrasion on each part | Separate replacement in case of abrasion on each part | |
| Inappropriate bearing injection part's distance between shelves | |||||
| Piston, Driving Shaft | Check whether the driving Shaft duly reached the piston | Piston processing failure | Exchanging | Exchanging the piston | |
| Bending due to external impact | |||||
| Assembling failure | |||||
| Spindle | Check the spindle size | Processing failure | Exchanging | Exchanging the spindle | |
| Abrasion of drill bit duly reaching part | |||||
| Piston, connecting rod | Check whether the piston and the connecting rod are operating well | Piston processing failure | Exchanging | Exchanging the piston | |
| Bending due to external impact | |||||
| Assembling failure | |||||
| Drill chuck | Check drill chuck damage and balance | being damaged by external impact | Exchanging the drill chuck | Exchanging the drill chuck | |
| Decrepitude due to exceeded endurance limit | |||||
| Flame Failure | Flame caused by Carbon brush | Carbon brush's shaking | an external diameter of commutator being scratched phenomenon and transforming | Replacing the amateur | Exchanging the amateur |
| Severe carbon brush damage and abrasion | Exceeded the abrasion limiting line | Replacing the amateur/ carbon brush | |||
| Carbon brush spring elasticity lose | flame due to using the fixture | ||||
| Flame caused by Overheating | Check the amateur and the stator are contacted | Burn-out due to overload | Exchanging the amateur and stator | Exchanging the amateur and stator | |
| case concentricity failure | replacing case | exchanging case | |||
| Flame caused by shaking | Check the bearing for damage | bearing damage due to entry of foreign matter | Replacing the bearing | Exchanging the bearing | |
| Check the condition of the gear worn out | abrasion caused by overload of the gear part | gear, final pinion | exchanging pinion | ||
| coated films loose(transform) occurred | assembling failure | Exchanging the gear | |||
| Amateur flame | Check the rough degree of the commutator surface | an external diameter of commutator being scratched phenomenon and transforming | Replacing the amateur | Exchanging the amateur | |
| Check whether or not the abrasion of the commutator surface | amateur balance failure | ||||
| Check whether or not the amateur coil is disconnected | amateur turning failure | ||||
| Check amateur coil insulating paper damage | insulating paper damage caused by foreign matter(dust) | ||||
| Flame caused by Stator | Check whether or not the stator coil worn out | Burn-out due to overload | Replacing the stator | Exchanging the stator | |
| Check the stator coil insulating paper for damage | |||||
| Damage (broken) | Amateur fan | Check the amateur fan for damage(shaking measuring) | foreign matter inserting in using | Replacing the amateur (check with the naked eye) | Exchanging the amateur |
| Check for damage with the naked eye | shape transforming(environment) in releasing | ||||
| amateur commutator | Check the amateur commutator part for damage | In using privately made goods | Replacing the amateur(check with the naked eye) | Exchanging the amateur | |
| in case of exceeding the term of guarantee | |||||
| in case of decrepitude of the product | |||||
| Stator core | Check the stator core for damage | external impact | Exchanging the stator | Exchanging the stator | |
| Processed goods (coated Films) | Check whether or not being punctured of crank shaft and being damaged | in case of the crank shaft material failure | replacing spindle | Exchanging the gear&spindle | |
| in case of the heat treatment failure | replacing coated Films | ||||
| Check the damage of the exterior part | in case of the gear disassembly and assembly | exchanging coated Films | |||
| shape transforming | |||||
| Housing, Gear cover, Cylinder case, crank, handle | Check whether or not the coated Films, emitted goods are damaged, shape transforming | external impact | exchanging | housing | |
| shape transforming | cylinder, crank | ||||
| gear case | |||||
| exchanging handle | |||||
| Beat guide, anvil, gear, connecting rod, piston | Check whether or not the damage and abrasion of the chisel part of processed goods and damaged | in case of overload operation exceed the rated using time | modifying and replacing | second gear | |
| decrepitude of the product exceed the term of guarantee | Connecting rod | ||||
| In case of material's heat treatment failure | Beat guide | ||||
| Bearing | Check the bearing for wear and damage | Decrepitude of the product due to exceeded term of guarantee | Replacing the bearing | Exchanging the bearing | |
| Damage due to forcible injection bearing | |||||
| The gears | Check the gear or pinion chisel part for damage | In case of overload due to operation exceeding the rated using time | Replacing the gear or pinion | Exchanging the pinion | |
| Decrepitude due to exceeded term of guarantee | Exchanging the gear, crank shaft | ||||
| In case of material's heat treatment failure | |||||
| Electronic parts | Check the switch, carbon brush, and brush holder for damage | Smooth operation impossible due to the input of switch part dust | Cleaning and replacing | Cleaning and exchanging | |
| In case of excessive tightening of fixing bolt of brush holder part | Replacing each part in case of damaged switch, carbon brush, brush holder | Exchanging the gear, spindle | |||
| In case of use of goods other than the manufacturer's goods for the carbon brush | Exchanging the switch | ||||
| Drill chuck | Check the drill chuck's operation and for damage | Damage due to external impact | Exchanging the drill chuck | Exchanging the drill chuck | |
| Drill chuck not working due to mixing in of foreign matter (rust occurrence) | |||||
| Change lever | Check the change lever's operation and for damage | External impact | Exchanging the change lever | Exchanging the change lever | |
| Plate damage and worn out | |||||
| Presspum | Check the tail cover for any crushed or damaged part | In case of careless handling by the consumer | Replacing each part in case of the tail cover being crushed or damaged tail cover | Exchanging the switch | |
| Using the tail cover equipment | Replacing each part of damaged prespun | ||||
| In case of decrepit tail cover | |||||
| Projected goods | Check the handle(A,B) for damage | Consumer's careless handling | Replacing the handle(A,B) | Exchanging the switch, handle | |
| Crack in molding | |||||
| Noise | Amateur | Abnormal noise ("woong") caused by the amateur fan's noise | Amateur fan is running idling | Replacing the amateur | Exchanging the A/R |
| Gear, second pinion | Check gear and pinion chisel part for wear and damage | In case of abnormal use during the term of guarantee (decrepitude) | Replacing the gear | Exchanging the pinion | |
| In case of failure of the chisel part | Modifying the injecting condition | ||||
| In case of occurrence of abnormal noise resembling iron being sharpened | In case of gear chisel part damage, and wear | Exchanging the crank shaft | |||
| Check the gear injection condition | Failure in gear injection | ||||
| Gear, piston, connecting rod | Check the processed good's chisel part for damage and wear | In case of abnormal use during the term of guarantee (decrepitude) | Exchanging | Cylinder | |
| In case of chisel failure of the chisel part | Connecting rod | ||||
| Check for the occurrence of abnormal noise | In case of gear part damage& wear | Second gear | |||
| Check the gear injection condition | Failure in gear injection | Connecting rod | |||
| Bearing | In case of bearing wear and damage | While using equipment | Replacing the bearing | Exchanging the bearing | |
| Dust seal assembly omitted | |||||
| Abrasion over time and damage due to exceeded endurance limit | |||||
| Mouse | in case of mouse damage | In case of frequent use of idle blow | Replacing the mouse | Exchanging the mouse | |
| Check the existing oil | When out of oil | Supplement oil | |||
| Others | Insufficient amount of grease | Insufficient injecting amount | Supplement grease | Injecting grease | |
| Output(RPM) decline | Amateur | Check the load current | Amateur flame occurred | Replacing the stator | Exchanging the amateur |
| Decrepitude due to exceeded endurance limit | |||||
| Coil failure | |||||
| Fusing failure | |||||
| Stator | Check the stator coil for burn out due to overload | Overload heat splice(coil burn-out) | Replacing the stator | Exchanging the stator | |
| Bearing | Check whether rotation is not smooth due to wear and damage | Entry of foreign matter | Cleaning, replacing | Cleaning, exchanging | |
| Punctured during assembly | Replacing the bearing | Replacing the bearing | |||
| Grease quantity | Check whether excessive grease has been injected | Grease over-injection (no-load current build-up) | Injecting a fixed amount of grease | Injecting a fixed amount of grease | |
| Housing, inner cover, gear cover, crank case | Check the occurrence of blurring in case of abrasion due to overuse of bearing's injecting part | Decrepitude due to exceeded endurance limit | Replacing the processed good(Coated Films) | Exchanging each part's defective processed good | |
| Inappropriate bearing injection part's distance between shelves (no-load current build-up) | |||||
| Overheating | Amateur, Stator | Check the amateur and the stator for interference | Failure in fastening of stator fixing bolt | Modifying and replacing | Exchanging the amateur |
| In case of bearing abrasion and damage | Exchanging the stator | ||||
| Bearing | Check the bearing for abrasion and damage | Check for wear and damage due to exceeded endurance limit of the bearing part | Exchanging the bearing | Exchanging the bearing | |
| Grease | if an Check adequate amount of grease(75~85g) is maintained | in case of insufficient amount of grease | Supplement grease; 75~85g | Injecting grease | |
| Processed goods | Check the processed goods bearing's duly reaching part for abrasion (gear cover, housing, cylinder case,crank case) | In case of bearing injection part's abrasion due to exceeded endurance limit of each processed good | Separate replacement in case of abrasion on each part | Separate exchange in case of abrasion on each part | |
| In case of damage of each processed good | |||||
| Others | Failure during assembly of various parts (EX: insufficient tightening) | Assembling failure | Modifying various parts | Using observable related measuring instrument | |
| Check the voltage(V) | Check whether or not the voltage(V) is rated voltage | ||||
| Running idle | Amateur, Gear, crank shaft | Check the running idle of the amateur chisel part, first gear, crank shaft | Heat treatment and inappropriate size | Modifying and exchanging | Exchanging the amateur |
| Exceeding the product specifications | Exchanging the crank case | ||||
| Running idle due to omission of key | |||||
| Final gear, second pinion | Check the running idle of the final gear | Size and processing failure | Modifying and replacing | Exchanging the cylinder case | |
| Peter key omission or damage | |||||
| Running idle due to omission of key | Exchanging the second gear | ||||
| Second gear | Check the second gear U-nut for loosening | Insufficient U-nut clamping force | Clamp based upon U-nut clamping force | Second gear reclamp | |
| Beat guide | Check the beat guide for wear and damage | Material failure | Exchanging | Exchanging the beat guide | |
| Abrasion due to exceeded endurance limit | |||||
| Drill chuck | Check whether the drill chuck is rotating smoothly(check the drill bit's biting condition) | Drill chuck abrasion and damage | Modifying and exchanging | Exchanging the drill chuck | |
| Chuck handle not tightened (came loose) | |||||
| Driving shaft | Check the running idle of the clutch, first gear | Size and processing failure | Exchanging | Exchanging the driving shaft | |
| Abrasion due to exceeded endurance limit | |||||
| Spindle | Check whether or not the spindle assembling part's retainer has come loose | Retainer damage | Modifying and exchanging | Exchanging the spindle | |
| Abrasion due to exceeded endurance limit | |||||
| Check the drill bit assembling part for wear | Check the spindle processing | ||||
| Short circuit | Amateur | Check the commutator for damage | Using the carbon brush fixture | Cleaning and replacing the amateur | Exchanging the amateur |
| Check the amateur part coil for puncture | Amateur turning failure | ||||
| Check the amateur commutator and coil for foreign matter (dust) | Heat releasing caused by foreign matter injection | ||||
| Stator | Check the coil for puncture and the insulating paper for damage | Coil and insulating paper burn-out caused by heat release due to mixing in of foreign matter | Replacing the stator | Exchanging the stator | |
| Foreign matter(dust) | Inadequate cleaning | Cleaning and replacing | |||
| Carbon brush | Entry of carbon brush powder into the amateur and stator | Quality problem of the carbon brush | Cleaning and replacing | Exchanging the amateur | |
| Inadequate cleaning | |||||
| Brush holder | Brush holder crack and damage | In case excessive of fastening of fixing bolt | Replacing the brush holder | Exchanging the brush holder | |
| In case of burn-out of brush holder part due to heat release | |||||
| Code | Check whether the code sheath is peeled off | Consumer's carelessness | Modifying, replacing the code | Exchanging the code | |
| Code failure | |||||
| Assembling failure | |||||
| Switch | Check the switch lead wire for damage | Check the switch for damage and deformation | Modifying and replacing | Exchanging the switch | |
| Connection layout | Check whether the lead wire is squashed when arranging it | Assembling failure | Modifying and exchanging | Check with the naked eye whether the wire is squashed | |
| Blow failure | Mouse | Check the mouse for damage | Using the mouse fixture | Modifying and exchanging | Replacing the mouse |
| Check the mouse for crack | Frequent use of idle blow during operation | ||||
| Bit guide, anvil | Check the bit guide, anvil for damage | Processing and material failure | Modifying and exchanging | Exchanging the bit guide | |
| Abrasion due to exceeded endurance limit | |||||
| Spindle | Check whether the retainer is omitted | Processing failure | Modifying and exchanging | Exchanging the spindle | |
| Deformation | |||||
| Piston, connecting rod | Check if the piston is able to go and return | Processing failure | Modifying and exchanging | Exchanging the connecting rod | |
| Piston assembly failure | |||||
| Damage due to exceeded endurance limit | |||||
| Piston | Piston abrasion | In case of decrepitude due to long time use | Replacing the piston | Exchanging the piston | |
| Oil over-inflow | Oil over-inflow in case of assembling failure and during repair | Removing the oil | |||
| Entry of foreign matter(dust) | External impact or quality problem | ||||
| Strike | Check the strike for damage | Quality problem | Exchanging | Exchanging the connecting rod | |
| Decrepitude due to exceeded endurance limit | |||||
| Change the lever | Check whether the change lever is operated | Change lever damage due to external impact | Exchanging the change lever | Exchanging the change lever | |
| Decrepitude due to exceeded endurance limit | |||||
| Driving shaft | Check the plate for wear and damage | Decrepitude due to exceeded endurance limit | Exchanging | Exchanging the ratchet | |
| Quality problem | |||||
| Ratchet gear | Check the ratchet and gear for abrasion | Decrepitude due to exceeded endurance limit | Replacing the plate | Exchanging the gear/spindle | |
| Quality problem | Exchanging the change lever | ||||
| Grease | Check if the amount of grease is adequate | Inadequate amount of grease | Supplement grease | Grease injection | |
| Grease over-injection | Supplement the fixed amount of grease | ||||
| X-ring, O ring | In case of X-ring, O ring wear | X-ring, O ring wear due to long time use | Replacing the X-ring, O ring | Exchanging the X-ring, O ring | |
| In case of X-ring, O ring damage | Assembling failure | ||||
| Failure during repairg | |||||
| Others | Part omission and wear inside of the cylinder | Decrepitude due to exceeded endurance limit | Exchanging worn out parts | Exchanging and modifying related parts | |
| In case of inserting two identical parts | Assembling failure | Modifying the assembly |