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Customer Support
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 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 change 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

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