Used in tube mill 1. material : Cr12/Cr12MoV 2. high precision 3. long life time

Tube Mill Roll:

Breakdown Pass Clearances

The radial clearance between the top and bottom rolls of each driven breakdown pass is equal to the gauge of the strip to be run through the mill. Set the clearances on all driven breakdown passes to this dimension. Many times mill operators ask “how tight is too tight?” when they are setting up this clearance. At this point of our set up (before the strip is threaded into the mill) it is best to use gauges to measure this clearance at the drive points on each roll. This is illustrated in Figure 1. Another method that may be easier than using gauges is the use of a self-made measuring tool. This tool is nothing more than a small section of the actual strip that will be formed on the mill. Place the strip between the top and bottom roll and set the clearance. After the strip has been threaded, we will check for thinning and proper “feel”. Clearance for the side rolls is measured at the bottom rim of both rolls as shown in Figure 2. The dimension is found in the Set Up Chart (see Note 2 on chart). In our example, we have three sets of side rolls in the breakdown section. They are designated as EF1-2,2-3, and 3-4. Use taper gauges or gauge blocks to measure the rim clearance. Adjust as necessary.

Tube Mill Roll