Tool-Wise V2Hole Saw Arbor Selection
What is a hole saw arbor and how do I select the correct one?
For hole saws below 1-1/4" (or 32mm) in diameter the most popular arbor is an M34. To attach a hole saw to the arbor simply screw a hole saw that contains a male thread in the centre of the cap to the corresponding female thread on the arbor shank.
For saws over 1-1/4" (or 32mm) in diameter the most popular arbor is an M45P, which in addition to the thread attachment also has two pins which move up and down to slot into the rear of the hole saw's body once the saw has been attached by the thread to the arbor. This gives extra support and prevents the thread from being stripped.
Both the M45P and M34 are suitable for use with standard ½" (or 13mm) chucks.
For those customers who do not want two separate arbors or are using the hole saws occasionally we produce an arbor that is suitable for use with all our hole saws irrespective of diameter. The M44K is suitable for use with hole saws from 9/16" (or 14mm) in diameter to 6" (or 152mm) and is again suitable for use with a ½" (or 13mm) drill chuck.
If you require different chuck sizes then please see the table below to find the most suitable arbor or alternatively please give us a call to discuss. All our Morse arbors come complete with a pilot drill. For use with carbide tipped hole saws or carbide grit hole saws please select the M34CT and M45PCT which comes complete with a carbide tipped pilot drill.
Arbor Selection
| Product Code | Chuck Size | Fits saws |
| M24K | 1/4" | 14mm - 30mm (9/16" - 1-3/16") |
| M24 | 1/4" | 14mm - 30mm (9/16" - 1-3/16") |
| M34 | 3/8" | 14mm - 30mm (9/16" - 1-3/16") |
| M44K | 1/2" | 14mm - 152mm (9/16" - 6") |
| M44 | 1/2" | 14mm - 30mm (9/16" - 1-3/16") |
| M35PS | 3/8" | 32mm - 152mm (1-1/4" - 6") |
| M45 | 1/2" | 32mm - 152mm (1-1/4" - 6") |
| M45P | 1/2" | 32mm - 152mm (1-1/4" - 6") |
| M46PS | 1/2" | 32mm - 152mm (1-1/4" - 6") |
| M55P | 3/4" | 32mm - 152mm (1-1/4" - 6") |
| M34CT | 3/8" | 14mm - 30mm (9/16" - 1-3/16") |
| M45PCT | 1/2" | 32mm - 152mm (1-1/4" - 6") |
| SDS5/8QC | SDS | 32mm - 152mm (1-1/4" - 6") |
| SDS1/2QC | SDS | 14mm - 30mm (9/16" - 1-3/16") |
