20 Most Recent Bosch HCBG500, 5 Pc Industrial Hammer Drill Bit Set Questions & Answers

cooling holes blocked
drill is being used at too hi a pressure, so the bit does not clear debris fast enough,
bit is blunt, even diamond drills blunt
the objuect being drilled is a composite, and some part of the composite is flammable
using a steel twist bit where a carbide impact bit should be used

not solution just some things to check

Remove the REVERSE-THREAD screw at the bottom of the chuck. Set the clutch collar to the highest setting, and set the gear to the slowest setting if this drill has a 2 speed transmission. Remove the power source! Get the biggest allen wrench you can fit in the end of the chuck(the shortest leg) and tighten the chuck down around it, allowing the jaws to rest and tighten on the flats of the wrench. Lay the drill on its side(chuck toward you, handle to the left, and allen wrench to the left, horizontal to the deck. Then with a hammer(soft hammer if you care about the allen wrench) quickly and deliberately hit the allen wrench in an attempt to cause the allen wrench to spin counter clockwise. Let me know if this works for you!

i suspected burnt armature...

Check the Cable between the plug and the switch for continuity using the ohmeter or continuity tester part of a cheap multimeter. Place one lead on each of the plug contacts in turn, and the other on the other end of that wire. If this is okay, check the switch for continuity by placing each lead of your tester on the in and out contacts and pressing the trigger. If still no joy, check the brushes. If still no joy, check the motor windings for continuity.

Hydraulic fluid straight from the drum, has a typical cleanliness level of ISO 4406 21/18. A 25 GPM pump operating continuously in hydraulic oil at this cleanliness level will circulate 3,500 pounds of dirt to the hydraulic system's components each year! To add hydraulic oil, and not the dirt, always filter new oil prior to use in a hydraulic system. This can be accomplished by pumping the oil into the hydraulic reservoir through the system's return filter. The easiest way to do this is to install a tee in the return line and attach a quick-connector to the branch of this tee. Attach the other half of the quick-connector to the discharge hose of a drum pump. When hydraulic oil needs to be added to the reservoir, the drum pump is coupled to the return line and the oil is pumped into the reservoir through the return filter. As well as filtering the oil, spills are avoided and the ingress of external contamination is prevented. The benefits of carrying out this simple modification are well worth the minor cost involved.

replace switch

check out toolpartsdirect for electrical diagram.
the think its electrical problem

if your internet provider is ok then the problem is your internet security setting is the problem.

i really dont worry about the leak near the shaft because with out the oil in the shaft there is a possibility that the shaft can jam. even dewalt new hammer when you purchase it come with the grease/lube like a toothpaste size. this is to lube the bits for the purpose the bit/shaft can move freely & also can hammer freely. our you can do is to dis-assemble the front end sleeve & remove the excess oil.will i agree weather can also change the viscosity of the oil. varsol cleaner can do the trick available at walmart.

yes but its depend on the problem

Are you thinking you are posting to Bosch Technical Services or Bosch Customer Complaints Department? We are FIXYA dot com. It sounds like the battery is flat. Did you charge the battery? You can test the output voltage of the battery with a multimeter. You can't do anything else as that would void the warranty. Contact the company and claim on it. As it is only one month old you can ask the seller to change it or refund under the UK Sale of Goods Act 'not of merchantable quality'. I presume you are UK as you refer to the light as a 'torch'. I am British, but live in Canada. ..

If you've replaced the variable speed unit in your Bosch 11318EVS SDS-max Demolition Hammer and the variable speed is still not working, there could be a few potential reasons for this issue. Here are some steps you can take to troubleshoot and address the problem:

1. Check Wiring Connections: Ensure that all wiring connections related to the variable speed control are properly connected and secure. Loose or damaged wires can disrupt the variable speed function.
2. Control Switch: The control switch itself could be faulty. Test the switch to make sure it's functioning as intended. Use a multimeter to check for continuity across the switch terminals in different speed settings.
3. Speed Control Potentiometer: The potentiometer, which is responsible for adjusting the variable speed, could be malfunctioning. Test the potentiometer with a multimeter to ensure it's changing resistance smoothly as you adjust the speed.
4. Electronic Control Board: The issue could be with the electronic control board that governs the variable speed function. Inspect the board for any signs of damage, such as burnt components or solder joints.
5. Brushes and Carbon Motor Contacts: Worn brushes or carbon motor contacts can affect the motor's performance and, consequently, the variable speed control. Check the condition of the brushes and motor contacts and replace them if necessary.
6. Power Supply and Voltage: Ensure that the tool is receiving the correct power supply and voltage. Incorrect power supply can affect the tool's overall performance.
7. Manufacturer's Support: If you've exhausted your troubleshooting efforts and the variable speed is still not working, it's advisable to contact Bosch customer support or a professional tool technician. They can provide more specific guidance based on the model and diagnose the issue accurately.
8. Professional Repair: If the issue is complex or involves internal components, it might be best to seek the assistance of a professional tool repair technician who has experience with Bosch power tools.

Remember that working with power tools and electrical components carries inherent risks. If you're not comfortable or experienced with tool repairs, it's recommended to seek professional assistance to ensure safety and prevent further damage to the tool.

It sounds like the issue with your Bosch bulldog extreme max hammer is likely due to worn out or damaged brushes. Here are the steps to remove and replace the brushes:

1. Unplug the hammer drill from the power source.
2. Remove the two screws on the top of the hammer drill handle with a screwdriver.
3. Lift off the top of the handle to expose the motor.
4. Locate the brush holders on either side of the motor.
5. Gently pull out the brush holder on one side of the motor.
6. Remove the brush from the holder by gently pulling it straight out.
7. Repeat for the other side of the motor.
8. Inspect the brushes for damage, wear, or discoloration. Blackening of the brushes is normal, but if they are excessively worn or damaged, they should be replaced.
9. Insert the new brushes into the brush holders, making sure they are properly seated.
10. Replace the brush holder on one side of the motor, then the other.
11. Reattach the top of the handle and replace the screws.

Regarding the digs in the motor surface, if they are not too deep and do not appear to affect the operation of the motor, they may not need to be addressed. However, if they are deep or if they appear to be affecting the motor's performance, it may be necessary to replace the motor. It's important to note that working on power tools can be dangerous and should only be attempted by those with the necessary knowledge and experience. If you're unsure about any step in the process, it's best to seek the help of a professional.

Yes, the issue you're describing with the green power light coming on but the tool not functioning could be related to the trigger/switch. A malfunctioning trigger/switch can prevent the tool from operating properly. You may want to test the trigger/switch with a multimeter to see if it is functioning properly. If the trigger/switch is not the issue, it could be with the motor or power supply. In that case, I would recommend reaching out to a professional for repair

Question edited for clarity, add MAKER. Question moved from Cars and Trucks. You fill it. https://www.google.com/search?q=ubh+12%2F50+rotary+hammer+oil+change ..

Disassembly videos. You may be able to fix it with Electrical contact cleaner.

1. Make sure the drill is properly plugged in and that the outlet is functioning.
2. Check the power cord for any visible damage, such as frays or cuts, that may be preventing the drill from receiving power.
3. Check the switch or trigger for any debris or foreign objects that may be preventing it from functioning properly.
4. Check the battery for any visible damage or corrosion. If the battery is damaged or no longer holds a charge, it may need to be replaced.

Faulty switch or worn / badly seated carbon brushes are the most likely reason. https://www.google.com/search?q=Bosch+Bulldog+Cordless+hammer+drill+stops+working+when+pressure+is+applied+to+drill+bit ..