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Question

Difficulty: MediumPortable Power Saws

When cutting a sheet of hardwood-veneered plywood with a portable circular saw, the blade teeth enter the bottom of the wood and exit through the top face. To prevent splintering and tear-out on the decorative veneer surface, how should the workpiece be positioned on the cutting supports?

  1. A
    Position the sheet with the decorative veneer facing up and adjust the blade depth to maximum extension.
  2. B
    Position the sheet with the decorative veneer facing up and use a coarse rip blade with few teeth.
  3. Position the sheet with the decorative veneer facing down on the cutting support.Answer
  4. D
    Position the sheet with the decorative veneer facing up and bypass the equipment ground prong to eliminate vibration.

Answer

Position the sheet with the decorative veneer facing down on the cutting support.
Portable circular saws are designed with blades that rotate upward into the base shoe. As a result, the blade teeth enter the stock from the bottom face and exit through the top face. Since splintering and tear-out occur on the exit side of the cut, positioning the decorative veneer face down ensures the visible surface receives a clean entry cut, while any splintering is limited to the unfinished back side.

Step-by-Step Solution

1
Analyze the blade rotation direction of a portable circular saw relative to the workpiece.
The blade rotates upward through the bottom of the base plate, meaning teeth enter from the underside of the stock and exit out the top.
Tear-out and chip-out occur where saw teeth exit a material, while the entry side produces a clean, sharp edge.
2
Determine the proper workpiece orientation to protect the decorative veneer face.
Placing the finished veneer face down ensures that the blade teeth enter the finished surface cleanly, confining any exit tear-out to the hidden back side.
This workshop practice keeps the visible surface free of splintering when using handheld circular saws.

Key Concept

Portable Circular Saw Cutting Mechanics and Workpiece Orientation
Estimated Time:1m 0s
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Topics

Portable Power Saws

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