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 damage | Mixing in of foreign matter | Cleaning and foreign matter removal | Cleaning |
| Decrepitude (exceeded the endurance limit) | Modifying and replacing the switch | Exchanging the switch | |||
| Damage due to impact | |||||
| Check the left and right rotations and changeR of speed | |||||
| Socket damage and omission | |||||
| Code | Check whether the code is disconnected | Disconnection due to the abnormal tension of the part of code clip occurred when moving | Modifying and replacing the code section | Exchanging the code | |
| Phenomenon of code being gnawed due to misuse during operation | |||||
| Code socket damage and omission | |||||
| Switch connection | Check whether the switch is connected in order | Lead wire breakaway caused by assembly failure | Reconnecting as shown in the picture in case of connection failure | Switch connection picture | |
| Connection failure | |||||
| Amateur | Check whether the amateur coil is disconnected | Coil burn-out thermic due to overload caused by 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 stator coil | Burn-out stator due to overload caused by excessive operation | Replacing the stator | Exchanging the stator | |
| Operation exceeded the rated using time | |||||
| Coil damage due to entry of foreign matter | Cleaning and exchanging | ||||
| Stator lead wire connection part damage | |||||
| Damage | Carbon brush | Check if the carbon brush is able to connect with the amateur commutator part | Use exceeding the carbon brush 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 in the brush holder | Cleaning and exchanging | ||||
| Check whether or not the desired carbon brush is inserted into the brush holder | |||||
| Amateur,Stator | Check for interference of amateur and stator | Amateur, stator not duly reaching the housing | Modifying and replacing | Exchanging the amateur | |
| Stator and amateur core failure | Exchanging the stator | ||||
| Bearing | In case of bearing abrasion and damage | In case of abrasion and damage due to exceeded bearing part endurance limit | Replacing the bearing | Exchanging the bearing | |
| Housing | Check the abrasion condition of the housing bearing's duly reaching part | Abrasion of bearing's duly reaching part due to exceeded endurance limit of housing | Replacing the housing | Exchanging the housing | |
| Check whether the housing deformed or damaged | Damage and deformation of housing caused by external impact | ||||
| Metal bush | Check for metal bush omission | Assembling failure(metal bush omission) | Modifying and replacing | Exchanging the gear and spindle | |
| Processed goods | Check the abrasion condition of the processed goods bearing's duly reaching part (gear cover, inner cover, housing, packing grand) | In case of abrasion of the bearing injection part due to the exceeded endurance limit of each processed good | Separate replacement in case of abrasion on each part | Exchanging the housing | |
| Failure in bearing injection part's distance between shelves | Exchanging the bearing | ||||
| Vibration | Amateur | Bending and puncture of amateur shaft and amateur fan occurred | Amateur balance failure | Exchanging | Exchanging the amateur |
| Deformation | |||||
| Bearing | Check whether or not the bearing worn out and damaged | in case of bearing worn out according to decrepitude | Exchanging the bearing | Exchanging the bearing | |
| in case of bearing damaged | |||||
| Housing | Check the abrasion condition of the housing bearing's duly reaching part | Abrasion of the bearing duly reaching part due to exceeded endurance limit of housing | Replacing the housing | Exchanging the housing | |
| Housing is deformed or damaged due to external impact | |||||
| Processed goods | Check the abrasion condition of processed goods bearing's duly reaching part (gear cover, inner cover, housing) | In case each part's processed goods are decrepit | Separate replacement in case of abrasion on each part | Exchanging the housing | |
| Inappropriate bearing injection part's distance between shelves | Exchanging the gear/inner cover | ||||
| Metal bush | Check whether the metal bush is omitted | Assembling failure(metal bush omission) | Modifying and replacing | Exchanging the gear/spindle | |
| Drill chuck | Check the drill chuck for damage and imbalance | Damaged due to external impact | Replacing the drill chuck | Exchanging the drill chuck | |
| Decrepit due to exceeded endurance limit | |||||
| Others | Drill bit is shaking | Drill adaptor processing failure | Replacing the drill adapter | ||
| Flame Failure | Carbon brush flame | Shaking of carbon brush | Scratching phenomenon and deformation of external diameter of amateur commutator | Replacing the amateur | Exchanging the amateur |
| Severe carbon brush damage and abrasion | |||||
| Carbon brush spring elasticity loss | Exceeded the carbon brush abrasion limiting line | Replacing the carbon brush | Exchanging the carbon brush | ||
| Flame caused by carbon brush failure(equipment) | |||||
| Flame caused by overheating | Check whether the amateur and the stator are contacted | burn-out occurred by overload using | Exchanging the amateur and stator | Exchanging the amateur and stator | |
| Housing concentricity failure | Replacing the housing | Exchanging the housing | |||
| Flame caused by shaking | Check the bearing for damage and the housing for deformation | Mixing in of foreign | Replacing the bearing, housing | Exchanging the bearing, housing | |
| Decrepitude and abrasion of housing | |||||
| Assembling failure and deformation | |||||
| Amateur Flame | Check the amateur commutator for abnormal abrasion and scratch | Amateur commutator being scratched phenomenon | Modifying and replacing | Exchanging the gear, spindle | |
| Amateur balance failure | |||||
| Check the amateur core insulating paper for damage | Scratching phenomenon of amateur | ||||
| Insulating paper damage due to entry of foreign matter(dust) | |||||
| Stator Flame | Check the stator core insulating paper for damage | Burn-out due to overload | Replacing the stator | Exchanging the stator | |
| Burn-out due to overload | Burn-out due to mixing in of foreign matter | ||||
| Brush holder | Check whether the brush holder is correctly assembled to the housing | Deformation of brush holder duly reaching part of housing | Replacing the housing | Exchanging the housing | |
| Damage of the brush holder | Replacing the brush holder | ||||
| Carbon brush | Check the quality of the carbon brush (honest goods) | Mixing in of foreign matter in the carbon brush (equipment) | Replacing the carbon brush | Exchanging the carbon brush | |
| Damage(broken) | Amateur | Check the amateur fan for damage | Damaged due to mixing in of foreign matter | Replacing the amateur (check with the naked eye) | Exchanging the amateur |
| Shape deformation(environment) when releasing | |||||
| Check the amateur commutator part for damage | Assembling failure (metal bush omitted) | ||||
| Decrepitude of the product due to exceeded term of guarantee | |||||
| Housing | Check the housing for damage | External impact | Modifying and replacing | Exchanging the housing | |
| Shape deformation | |||||
| Bearing | Check the bearing for wear and damage | Decrepitude due to exceeded term of guarantee of bearing | Replacing the bearing | Replacing the bearing | |
| Damage due to forcible injection | |||||
| Gear spindle | Check the gear or spindle's chisel part or damage | In case of overload due to operation exceeding the rated using time | Replacing the gear or spindle | Exchanging the gear, spindle | |
| Product decrepitude due to exceeded the term of guarantee | |||||
| In case of material's heat treatment failure | |||||
| Presspum | Check the Coated Films for damage | In case of consumer's negligent handling | Replacing the Coated Films | Exchanging the housing | |
| In case the Coated Films are decrepit | |||||
| Switch | Check the switch speed adjustment part, left and right rotation part | External impact | modifying and replacing | Exchanging the switch | |
| Damaged while connecting the code, stator lead wire | |||||
| Code | Check the code wire for damage | External impact | Replacing the code | Exchanging the code | |
| Decrepitude due to exceeded endurance limit | |||||
| Drill chuck | Check the drill chuck for damage and its operation | Damage due to external impact | Replacing the drill chuck | Exchanging the drill chuck | |
| Drill chuck not working due to mixing in of foreign matter (rust occurrence) | |||||
| Stator | Check the stator core for damage | External impact | Replacing the stator | Exchanging the stator | |
| Hook | Check the hook for damage | External impact | Replacing the hook | Exchanging the hook | |
| Noise | Amateur | Abnormal noise ("woong") caused by amateur fan noise | In case fan guide assembly is omitted | Replacing the amateur | Exchanging the amateur |
| Amateur fan is running idling | |||||
| Gear, pinion | Check the gear and pinion chisel part for wear and damage | In case of abnormal use within the term of guarantee (decrepitude) | Replacing the gear | Exchanging the gear, spindle | |
| 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, wear | ||||
| Check the gear injection condition | Failure in gear injection | ||||
| Bearing | In case of the bearing's wear and damage | In using equipment | Replacing the bearing | Exchanging the bearing | |
| Abrasion and damage due to exceeded endurance limit | |||||
| Others | Check if the amount of grease is adequate | Noise caused by shortage of grease | Supplement the grease if the amount is insufficient | Injecting grease | |
| Output(RPM)decline | Amateur | Check the load current | Decrepit due to exceeded endurance limit | Exchanging the amateur | Exchanging the amateur |
| Amateur coil failure | |||||
| Amateur commutator 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 it is smoothly rotating and for wear and damage | Entry of foreign matter | Replacing the bearing | Exchanging the bearing | |
| Punctured during assembly | |||||
| 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 | Check for the occurrence of blurring in case of abrasion caused by overuse of bearing injecting part | Decrepit due to exceeded endurance limit | Replacing the housing | Exchanging the housing | |
| Inappropriate bearing injection part's distance between shelves (no-load current build-up) | |||||
| Metal bush | Check for whether or not the metal bush is omitted | Metal bush crushed and damaged(assembling failure) | Replacing the metal bush | Exchanging the gear spindle | |
| Overheating | Amateur, Stator | Check the interference of the amateur and the stator | Bearing abrasion and damage | exchanging amateur&stator | exchanging amateur&stator |
| Abnormal current occurred | |||||
| Bearing | Check for bearing abrasion and damage | Check for wear and damage due to exceeded endurance limit of the bearing part | Exchanging the bearing | Exchanging the amateur&stator | |
| Grease | Check if the amount of grease is adequate | Insufficient or excessive injection of grease | Grease conditioned weight injecting | Exchanging the bearing | |
| Housing | Check the abrasion condition of the bearing duly reaching part of housing | Abrasion of bearing injection part due to exceeded endurance limit of housing | Exchanging the housing | Grease conditioned weight injecting | |
| Processed goods | Check the abrasion condition of the bearing's duly reaching part of processed goods (gear cover, inner cover, housing, packing grand) | in case of abrasion of bearing injection part due to the exceeded endurance limit of each processed good | Separate replacement in case of abrasion on each part | Exchanging the housing | |
| In case of damage of each processed good | |||||
| Others | Assembling failure of various parts (EX: insufficient tightening) | Assembling failure | Modifying various part | Exchanging the housing | |
| Check the voltage(V) | Check the voltage(V) | ||||
| Running idle | Amateur, Gear | Check the amateur chisel part, gear abrasion | Heat treatment failure | Replacing the amateur | Exchanging the amateur |
| Use outside the product specifications | Replacing the gear | Exchanging the gear spindle | |||
| Drill chuck | Check whether or not the drill chuck is smoothly rotating(check the drill bit biting condition) | Drill chuck abrasion and damage | Modifying and replacing | Exchanging the drill chuck | |
| Not tightened by chuck handle (come loose) | |||||
| Gear, pinion | Abrasion condition of gear and pinion | Loosening occurred due to insufficient clamping force of amateur pinion part | Replacing the gear, second, pinion | Exchanging the gear, spindle | |
| Final/Spindle Gear | Check whether or not the final gear/spindle is running idle | Size failure | Replacing | Exchanging the final gear/spindle | |
| abrasion due to exceeded endurance limit | |||||
| Final/Second Gear | Check whether the first gear/second gear is running idle | Size failure | Replacing | Exchanging the first gear/pinion | |
| Abrasion due to exceeded endurance limit | |||||
| Short circuit | Amateur | Amateur commutator, coil damage | Amateur coil and turning failure | Replacing | Exchanging the amateur |
| Check the amateur commutator and coil for foreign matter(dust) | Short due to mixing in of foreign matter | ||||
| Stator | Check the coil for puncture and the insulating paper for damage | Coil and insulating paper burn-out due to heat release caused by mixing in of foreign matter | Replacing | Exchanging the stator | |
| Insufficient cleaning | |||||
| Carbon brush | Check whether the carbon brush is on the amateur and the stator | Quality problem of carbon brush | Cleaning and replacing | Exchanging the carbon brush | |
| Insufficient cleaning | |||||
| Brush holder | Crack and damage of brush holder | Short occurred due to loosening of stator socket lead wire (fire phenomenon) | Replacing the brush holder | Exchanging the brush holder | |
| Check the brush holder socket insertion part | |||||
| Code | Check whether the code sheath is peeled off | Consumer carelessness | Modifying, replacing the code | Exchanging the code | |
| Check the code socket | Failure of code itself | ||||
| Failure during assembly | |||||
| 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 the squashed part | Check the squashed wire with the naked eye |