Good power tool maintenance comes down to five habits: clean after every use, check and replace carbon brushes before they wear to the limit, lubricate moving parts on schedule, inspect cables and guards for damage, and store dry away from moisture. Multi Trade Combines stocks genuine Bosch spares — carbon brushes, gears, chucks and switches — on AT Road, Guwahati.
Clean, inspect brushes, lubricate, check cables, store dry
1. Clean after every use: Blow dust from motor vents with compressed air immediately after use — especially after grinding or cutting concrete, where dust can clog vents and cause overheating within a single shift.
2. Check carbon brushes: Brushes wear gradually and give warning signs — reduced power, excessive sparking at the commutator or intermittent cutting out. Inspect every 50–100 hours and replace before they reach the wear limit. Continuing to run worn brushes can score the commutator, turning a ₹50 spare into a costly rewind.
3. Lubricate on schedule: Angle grinder gearboxes need grease replenishment every 200–300 hours. Use the grade specified in your tool manual. Rotary hammer SDS mechanisms need light oil on the shank before each session. Never use petroleum-based sprays (WD-40) inside a gearbox — they dissolve grease rather than providing it.
4. Inspect cables and guards: A nicked power cable is a serious electrical hazard. Check the full length of the cable monthly and replace at the first sign of insulation damage. Confirm disc guards are undamaged and locked before switching on.
5. Store dry: Moisture causes armature winding rust and corrosion on switch contacts. Store tools in a dry cabinet or case, especially in Assam's monsoon season when humidity is extreme.
See: Power Tools Catalogue | Bosch Products | Best Cordless Drill for Professionals
Carbon brushes, chucks, grease and switch assemblies in stock
Using genuine manufacturer spares is the single biggest factor in getting a long, reliable life from a professional power tool. Multi Trade Combines stocks on-counter genuine Bosch spares in Guwahati for the most common professional tools:
Bring your tool to the AT Road counter and our team can identify the right spares on the spot. We can also advise when a repair is not economical and a replacement is a better investment.
Carbon brushes in angle grinders and drills should be inspected every 50–100 hours of use or whenever you notice reduced power, sparking or intermittent running. Most Bosch tools have a brush length indicator — replace when the brush reaches the minimum mark. Multi Trade Combines stocks genuine Bosch carbon brushes in Guwahati.
After each use, blow out dust from vents with compressed air (never water). Wipe the housing with a dry cloth. Clean chuck jaws with a dry brush — never submerge in solvent as this washes out factory grease from the gearbox. For gearbox lubrication, use the manufacturer-specified grease (not WD-40) at the intervals in your tool's manual.
Multi Trade Combines on AT Road, Guwahati is an authorised Bosch dealer stocking genuine carbon brushes, gears, switch assemblies and chucks for Bosch angle grinders, drills and demolition hammers. For tools requiring service beyond brush replacement, we can advise on the nearest Bosch service centre. Call +91 91812 13332 or WhatsApp +91 76359 98826.