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7.5 KW 1440 RPM Wood Splitter with 80mm Drill & 1050mm Belts: Techniques to Prevent Blockages

piotruś 123 12771 16
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How can I stop a 7.5 kW wood splitter with an 80 mm auger from jamming and making the drive belts slip when splitting hard wood?

Use toothed V-belts and align the motor so the belts sit properly in the pulley grooves; the small motor pulley is causing poor belt contact and slip, and a larger pulley on the motor and/or auger would also improve torque and reduce stalling [#16323712][#16323836][#16329033] Check the pulley groove angle, belt depth, and clean/degrease the belt and grooves so the belts grip correctly [#16323836][#16323946] The original poster reported the splitter was repaired after fitting toothed V-belts and setting the motor correctly on the belts, after which the auger worked normally [#16328998]
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  • #1 16323664
    piotruś 123
    Level 9  
    Posts: 112
    Rate: 120
    Hello, I have a splitter like in the picture. 7.5 kw engine, 1440 revolutions, drill fi 80, drive for belts 17 two pieces length 1050, belt pulley on the engine external dimension 80 and shaft on the shaft fi 170. The problem is that the drill comes into a tree and blocks . The belts slide on the engine. When I pull the straps, the drill comes in and stands again. I will split the tree on the pine tree. Pr I brought a tree called elm and that's how it is that the splitter is becoming. Even when I take a tree with my sides it is also the same. I thought I could put on longer straps for example 1300. But will it help? someone has an idea. The engine was checked by an electrician and is ok.
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  • #2 16323712
    tata1
    Level 20  
    Posts: 785
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    From the photo you can see that you have too small a pulley on the engine. From here the straps catch the slip.

    Just a small pulley has too small a contact area to the belt and hence a slip.

    Of course, the wheel on the auger must also be bigger then.
  • #3 16323836
    1 PAWEL
    Level 42  
    Posts: 7210
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    Insert the image of the drill bit at the side, look also at the angles of the belt grooves and the belt or the belt is not too shallow in the grooves.
    A good solution for the small wheel on the engine is the toothed belt.
    A pulley on a steel or cast iron engine?

    7.5 KW 1440 RPM Wood Splitter with 80mm Drill & 1050mm Belts: Techniques to Prevent Blockages
  • #4 16323884
    piotruś 123
    Level 9  
    Posts: 112
    Rate: 120
    the wheel is steel.
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  • #5 16323902
    marek49ae
    Level 24  
    Posts: 636
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    Rate: 252
    My log splitter has a 300mm shaft on the 150mm engine, 4kw engine, 900 rpm, 2 V-belts 17. The roller speed is about 450 revolutions. Strips tensioned on the string, sometimes as it hits the knot also becomes but the engine. I have a switch on hand so I switch it off quickly.
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  • #6 16323911
    wojtek1234321
    Level 36  
    Posts: 3553
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    I would put a circle on the drill again, it would be slower to spin, and it would be "stronger".
    I do not know if I counted correctly, but the borer rotates at 677,6 revolutions per minute, for which he has such a turnover, it will be enough for 400-450, recommended from 400 to 600.
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  • #7 16323946
    1 PAWEL
    Level 42  
    Posts: 7210
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    The steel wheel is not recommended, the cast iron is better, the straps are well laid out to the depth.
    Check again if the straps adhere well to the sides of the belt grooves and try to degrease the surfaces of the grooves and the belt.
    Colleagues are good at replacing wheels.
    Enlarges the wheel on the engine and the wheels on the auger spindle.
    You currently have around 677,6 rpm without load.
    Certainly it would be enough for around 400 - 500 rpm.
  • #8 16323960
    Rezystor240
    Level 42  
    Posts: 9240
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    Use a larger pulley on the auger, torque will increase.
    You could use a flywheel on a drill and not stuck on a gnarled tree.
    You can reduce the drill itself, you would slower it, but it would not stutter.
  • #9 16323964
    Wawrzyniec
    Level 38  
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    Simple, you have too small pulleys, and therefore too small belt. You also have a bad transmission and too high a turn of the bit, so it can also wedge. I also have a borer 80, and the pulleys are: on a 100mm motor, 2x17 a on a 300mm borer. At 270 it would also be fine and a little faster. I have never blocked the bit, and I also crush the gnarled and twisted. Recently, I was cutting an apple tree 50cm in diameter and 40cm in height and birch, the same blocks. The engine warmed up a little, and I have 5.5kW of 1,440 revolutions.

    7.5 KW 1440 RPM Wood Splitter with 80mm Drill & 1050mm Belts: Techniques to Prevent Blockages
  • #10 16324252
    piotruś 123
    Level 9  
    Posts: 112
    Rate: 120
    I will start by replacing the toothed belts. If it does not help, I'll put a circle on the 270 drill.
  • #11 16328998
    piotruś 123
    Level 9  
    Posts: 112
    Rate: 120
    Łupiarka repaired. I put on the toothed V-belts and set the engine well on the strings so that the belts fit well into the engine belt pulley. The smoke goes out with the drill :D . Thank you for your help. If someone wants to buy a tree saw, I invite you to my olx auctions. Gives the ID of the ad: 284505359
  • #12 16329033
    1 PAWEL
    Level 42  
    Posts: 7210
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    Toothed belts are the best output for smaller pulleys, they are much better around the wheel than ordinary V-belts which are too stiff.
  • #13 16329221
    Wawrzyniec
    Level 38  
    Posts: 3974
    Help: 390
    Rate: 1065
    There is one more thing about this splitter: an incorrect switch, not the motor. You have this: 7.5 KW 1440 RPM Wood Splitter with 80mm Drill & 1050mm Belts: Techniques to Prevent Blockages
    With such an engine 7.5 KW 1440 RPM Wood Splitter with 80mm Drill & 1050mm Belts: Techniques to Prevent Blockages
    And you should have one

    Added after 45 [seconds]:

    7.5 KW 1440 RPM Wood Splitter with 80mm Drill & 1050mm Belts: Techniques to Prevent Blockages
    and for a current greater than 20A. With this connection you have now overheated the engine.
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  • #14 16329233
    piotruś 123
    Level 9  
    Posts: 112
    Rate: 120
    But then it is not left - right. And if it's jammed, it's a problem. And so the rotation to the left and wykręcam.A engine is connected in a can at once and is ok.
  • #15 16329247
    Wawrzyniec
    Level 38  
    Posts: 3974
    Help: 390
    Rate: 1065
    piotruś 123 wrote:
    turn to the left and twist
    Did you check it? Probably not. And if you come to crush gnarled wood, you will burn the engine, or the switch, or the installation at home, because such a connected motor generates high currents, you have a clear sign, you see. This is a connection to start-up, not work. If it fits well, there is no chance to unscrew the engine, and besides, this engine in this connection has a much lower power with a higher power consumption and does not keep the rotation.
    I saw once the switch right / left / star / triangle.
  • #16 16329312
    kortyleski
    Level 43  
    Posts: 12262
    Help: 957
    Rate: 3834
    What are you saying, Wawrzyniec, for nonsense? According to a readable plate, it should be associated in a star. Only switching into a triangle will cause the flow of high currents, but only briefly because the engine will burn.
  • #17 16329388
    Wawrzyniec
    Level 38  
    Posts: 3974
    Help: 390
    Rate: 1065
    This is probably a spring eclipse. From the morning I would split a tree, cut into blocks and plunder again.
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Topic summary

✨ The discussion revolves around a 7.5 kW wood splitter experiencing blockages when drilling into trees, particularly elm. Users suggest that the issue may stem from the small pulley size on the engine, leading to belt slippage. Recommendations include using larger pulleys on both the engine and auger to increase torque, switching to toothed belts for better grip, and ensuring proper alignment and tension of the belts. Some users also mention the importance of using cast iron pulleys over steel for better performance. Additionally, concerns about the electrical switch and motor connections are raised, indicating potential overheating issues. The author plans to implement some of these suggestions, including replacing the belts and adjusting the drill size.
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