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OPERATION
CAUTION:
footwear, and leather gloves to protect from burrs and sharp edges.
1. Operating your TN-250 is very easy, but certain steps need to be followed.
2. After your notcher is assembled, it needs to be clamped into a vise or bolted to the side of a
workbench. The main vise plate has a machined step that is designed to make insertion into
vise jaws very easy.
3. Choose a hole saw that matches your materials outside diameter and screw it onto the
threaded stud on the end of the main shaft arbor.
4. If you will be notching on center,
check the height scale on the left
side of the notcher and make
sure the pivot clamp block is in
the zero position. If an offset
notch is required, loosen the two
hex screws using a 3/8 hex key
wrench and adjust it to the
desired offset.
5. Open your vise assembly using
the 3 legged hand wheel and
insert the desired tubing that
needs to be notched. The
amount of tubing protruding past
the vise will be determined by
the angle of notch, and the hole
saw should be slid forward to set that distance.
6. Tighten the material, being careful not to over tighten and crush your tube, as the vise has
supreme holding power.
7. If an angle notch is required, loosen the two hex bolts on the side of the clamp block with a
3/8" hex key. Position the pivot arm to the desired angle. And re-tighten. Angles up to 45
degrees work best using the center slot in the pivot arm, the second slot is used for extreme
angles and for notching on curved tubes as it aides in offsetting further.
8. When the desired angle is set, the aluminum bearing block should be slid as far forward as
possible to the notch, this will make the cutting as rigid as possible. Be sure to tighten the
two hex bolts beneath the aluminum block using a 3/8" hex key.
9. A 1/2" drive electric drill will need to be chucked onto the hexed arbor, and tightened
securely.
Always wear proper eye protection with side shields, safety
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