Borum CH30T, Owner'S Manual

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10/19 CH30T
Made in China to TQB Brands Pty Ltd specifications P a g e | 6
Visit us at www.tqbbrands.com.au
Drilling Speed (Approximately)
Belt Tension Adjustment
Correct belt tension: Use 4.5kg’s of hand pressure on the belt as shown below. The distance is
1/2” (13mm) + 10%
Quill Spring Adjustment
Fig 17 Speed Adjustment
1. Move the stop nuts to the lowest position and lock into
place with a wrench to prevent quill dropping while
tensioning spring
2. Place screwdriver in lower front notch (A) of spring cap
(B) and hold it in place while loosening and removing
nuts.
3. Carefully turn screwdriver counter clockwise and
engage next notch
4. Tighten inner nut (C) with wrench. DO NOT
overtighten as this will restrict quill removal.
5. Move stop nuts to highest position and check tension
while turning feed handle. It there isn’t enough
tension on spring, repeat steps 2 – 4.
6. Check quill while feeding for: Smooth and unrestricted movement. If movement is too
tight slightly loosen nuts until unrestricted.
Size
Diameter
Cast Steel Tool Steel Cast Iron Mild Steel Alum. & Copper
Cutting Speed
m/min ft/min m/min ft/min m/min ft/min m/min ft/min m/min ft/min
12 40 18 60 24 80 30 100 60 200
mm Inch Cutting Speed Revolution Per Minute
2 1/16 1910 2445 2865 3665 3820 4890 4775 6110 9550 12225
3 1/8 1275 1220 1910 1835 2545 2445 3185 3055 6365 6110
5 3/16 765 815 1145 1220 1530 1630 1910 2035 3820 4075
6 ¼ 610 610 955 915 1275 1220 1590 1530 3180 3055
8 5/16 480 490 715 735 955 980 1195 1220 2390 2445
10 3/8 380 405 570 610 765 815 955 1020 1910 2035
11 7/16 350 350 520 525 700 700 870 870 1740 1745
13 1/2 300 305 440 460 590 610 735 765 1470 1530
16 5/8 240 245 360 365 480 490 600 610 1200 1220
19 3/4 190 205 285 305 380 405 480 510 955 1020