How to Change a Cutting Drum on a Scarifier
If you have been using your scarifier for a while, the scarifier's cutting drum will need to be replaced periodically. Your manufacturer's manual is helpful in understanding this procedure, but we will explain the steps necessary to replace your dethatcher drum. By following the four steps in this method, you can replace your drum easily and efficiently. The main four steps are: Removing the cutting drum, disassembling the cutting drum, reassembling the cutting drum, and reassembling the cutting drum. Because of the complex process involved in these stages, we break it down into simple steps. Follow these instructions to get your scarifier ready for use.
A) Cutting roller removal:
1. Rotate the scarifier so that it rests on the handle bar.
Note: Never place the scarifier on the back of the handle bar
2. Locate the shaft cover and mounting screws.
3. Remove the shaft cover and cage, use 9/16 wrenches and/or sockets on the rear retaining bolt, and loosen the front retaining bolt.
4. Remove the shaft and plastic cover from the belt guard and expose the shaft.
5. Use a 15/16-inch socket wrench to loosen the outer shaft.
Note: Turn it counterclockwise.
6. Remove the outer shaft while pulling on the retaining nut with your index and middle fingers. (see pictures missing below*)
Note: Repeat step 6 for the inner shaft and also the retaining nut.
7. Remove the cutting roller as shown by pushing it away from the belt side and removing the shaft.
B) Cutting drum disassembly:
1. Locate the retaining ring and retaining screws on the edges of the cutting drum.
2. Use a 7/16 inch wrench to remove the 3 retaining screws.
3. Remove the drum retaining ring and the three apartment washers Note: Place these items in a safe place.
Cutting Drum Components + Assembly:
There are a few things to consider on each side of the retaining plates before installing the cutting drums: Both sides are wide. Moreover, three major components may be accommodated within these plates:
shafts made of hardened steel. spacers made of hardened steel.
2) Cutter drums.
The two primary assemblies will be examined: the flat tip drum assembly for typical applications and the tungsten carbide assembly for more aggressive finishing. Let's examine a few things to remember:
Shafts, which are sometimes known as "bars" or "handles," serve to hold the most popular cutting discs or cutters. Six hardened steel shafts are held by two retention plates and one central plate for cutting drums that are 8 inches long.
Spacers: This device provides for just the right amount of movement—not too much—between each other cutter. Check that all of the cutters may spin freely without being overly tightened in order to evaluate the space balance of your drum. If there is too much room, it could lead to early deterioration of the Cutting Drum and premature wear. Drums for scarifiers need to be balanced well enough to spin easily; if they are too loose, you can add a cutter or a spacer to the shaft.
Scarifier drum cutters are sometimes known as "Cutting Discs" or simply "drum cutters." This tool lets you specify the kind of surface finish you want at the job site. When installing the drum cutter conditions into the shafts, we advise updating them. Verify that the tips are not missing and that they are not overly worn. There are many distinct kinds of cutters, each with unique features. Depending on the material, certain cutters survive longer than others. We shall briefly discuss the three main categories of cutters. Visit our blog on "Scarifier Cutters" to discover more about their primary use.
The most cost-effective cutter for a long-lasting smooth finish is the steel scarifier cutter. used best for mild surface preparation tasks like coating applications or substance removal. Furthermore practical for everyday tasks like cleaning Waterproofing membranes, plastic coatings, glues, and other thick and soft materials can be removed with a milling scarifier cutter. Traffic lines, epoxy, and other types of general scarification can all be removed with a milling cutter.
• Tungsten Carbide Cutter (TCT): Designed for heavy-duty scarifying applications, it has an exceptional life. For extremely severe jobs like grinding, leveling, grooving, cleaning, and other general surface treatments, use this cutter. For general purposes, let's examine how a 6-tooth tungsten carbide drum is put together:
1. Take off the retaining plate on the drum:
2. Put the cutting drum together by doing the following:
a. Remove the first shaft's widest side.
b. Five steel spacers and one carbide cutter should be added to the wide side's edges.
c. Include a carbide and a few spacers.
d. Add 4 cutters as soon as you get to the middle of the shaft's end. e. Add one to two spacers to finish.
Ensure sure all cutters can spin freely; if a spacer seems too tight, remove it.
3. Assemble the shaft's narrower side by inserting two spacers:
f. Including 3 spacers and 1 carbide cutter.
g. Repeat steps (adding 1 cutter and 3 spacers) for the following round.
g. Add one or two spacers last.
4. The first shaft's design is reversed in the following shaft. While working on the scarifier, be careful to balance the drum in the same manner as the reverse section to ensure that all of the cutters strike the surface.
5. Use the to close the cutting drum.
Installation of the cutting drum:
1. Place the cutting drum into place by lining it up with the shaft-side bearing.
Keep in mind to confirm that the scarifier's cutting drum and shaft are completely assembled.
2. Put the shaft's inner retaining nut into place.
3. Tighten the inner retaining nut on the shaft using a 15/16-inch socket.
Be sure to counterclockwise-rotate the shaft.
4. After the shaft has been inserted, reattach the belt guard's holding nut.
5. Swing the shaft guard cover into position and fasten the rear retention screw.
After you comprehend the crucial elements of your concrete scarifier, these methods will become simpler to follow. To replace your cutting drum, follow these four steps. Also, be sure to get the proper drum cutters, as they will affect how smooth your surface will be.
Don't forget to select the appropriate cutter type for the task. Keep track of the drum cutter's lifespan and how often the scarifier is used. Verify that the new set of cutters is in proper shape and is missing no tips.
Make that the cutter drum is balanced and has the right size, quantity, and number of cutters. Your drum needs to be bounced in order to avoid malfunction and potential premature wear. Finishing the edges or corners of the retaining plate can be difficult and time-consuming. In fact, after experimenting with the other shafts, you will have a balanced, spin-free drum that is ready for use.
