| 摘要 |
<p>A radial arm (16) of a radial arm saw (10) comprises a lightweight metal casting of inverted U cross-section and having opposing longitudinal grooves (32,34) in the innerfaces of the side walls (30) of the inverted U. A metal strip (40, 42) of resilient arcuate cross-section is press fitted into each groove (32, 34) to form guides for supporting and guiding a power saw unit (18) movable along the radial arm. The low weight of the radial arm (16) is particularly advantageous for a portable radial arm saw, and the inserted metal strips (40, 42) form inexpensive durable guides.</p> |
