What oil should be added to an impact drill?

[GenevieveDella]

Impact drills can be lubricated with grease. If you want to maintain and use it properly, you can purchase high-temperature grease that can withstand temperatures up to 320 degrees or higher. More details are as follows: How an impact drill works: An impact drill operates through both impact and rotation. If it only relies on impact, the effect would be minimal. It needs to achieve an impact frequency of over 40,000 times per minute to generate continuous impact force. It can be used on natural stone and concrete. Precautions: When using an impact drill, first connect it to the power source. Then, let it idle for a while to check its impact force and rotation sensitivity. During operation, ensure that the drill's pointer aligns with the working material. Additionally, wear safety goggles before starting the operation.

[LeClara]

As an experienced renovation master, those who frequently use impact drills know that maintenance is crucial. For the gearbox, apply high-viscosity lithium-based grease, the kind similar to butter, to reduce gear wear. The gearbox is best lubricated with fluid 20-grade machine oil—just drip it into the oil filler hole until it overflows. Don’t rush to lubricate a new machine; wait about a year and assess the situation. A crucial reminder: always distinguish between a rotary hammer and an impact drill. Professional equipment like rotary hammers require 32-grade hydraulic oil, filled to about 80% of the oil reservoir’s capacity. Using the wrong oil can cause the machine to malfunction at best or even be permanently damaged. Also, remember to clean and apply some rust-proof oil if the tool won’t be used for a long time.

[MacFelicity]

Last week, I just performed maintenance on my Bosch impact drill. The key to maintaining an impact drill lies in the rotating components, especially the gear set, which must be lubricated with molybdenum disulfide lithium-based grease for its high-temperature resistance and anti-wear properties. For the bearings, a bit of high-speed bearing grease can be applied. Timing is crucial when adding lubricant—once you noticeably feel the impact weakening, it's time to disassemble, clean out the old grease sludge, and apply fresh lubricant. Upon disassembly, I've noticed many people mistakenly use WD-40 as a lubricant, which is a major no-no! It's only for rust removal, not lubrication. After each use, remember to clean out drilling debris to prevent particles from mixing into the gears and accelerating wear.

[Ashley]

Having worked on construction sites for ten years, impact drill maintenance is crucial. First, identify which type you have: light-duty household impact drills are basically maintenance-free, only professional-grade gear-driven ones require upkeep. For grease, choose a high-temperature, pressure-resistant type, such as Mobil XHP222 or Shell Alvania EP2. When applying grease, observe the condition of the old grease—if it's blackened or clumped, it must be thoroughly cleaned. Every time you change the drill bit, add a couple of drops of light oil into the chuck to keep it flexible. The worst thing is when beginners use ordinary grease indiscriminately—that stuff melts away at high temperatures.

[AnastasiaDella]

Remember when buying the impact drill, the manual stated that regular maintenance is required. The oil level should be checked after every 20 working hours. A medium-viscosity ISO VG68 hydraulic oil is suitable for the gearbox. If there's a metal friction sound from the impact mechanism, oil must be added immediately. The maintenance tip is to disassemble the machine first, clean the parts with kerosene, let them air dry, and then apply new oil. Don't cut corners by using automotive engine oil as a substitute, as it can easily cause sludge and jam the parts. Always remove the drill bit before storage, otherwise the spring can easily lose its effectiveness.