1. What is SFM for Aluminum Cutting?

Surface Feet per Minute (SFM) is the speed at which the band saw blade teeth pass by the cutting surface. For aluminum, the recommended SFM range is typically 200 to 300.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( SFM \) — Surface feet per minute (200-300 for aluminum)
• \( Diameter \) — Band saw wheel diameter in inches
• 3.82 — Conversion constant

Explanation: The formula converts SFM to RPM based on the wheel diameter to ensure optimal cutting speed.

3. Importance of Proper Band Saw Speed

Details: Using the correct speed extends blade life, improves cut quality, and prevents material damage. Too slow causes rubbing, too fast causes overheating.

4. Using the Calculator

Tips: Enter the band saw wheel diameter in inches and desired SFM (200-300 for aluminum). The calculator will output the recommended RPM setting.

5. Frequently Asked Questions (FAQ)

Q1: Why is 200-300 SFM recommended for aluminum?
A: This range provides the best balance between cutting efficiency and blade life for most aluminum alloys.

Q2: What if my saw doesn't have exact RPM settings?
A: Choose the closest available setting, preferably erring on the slower side for harder alloys.

Q3: Does alloy type affect the optimal speed?
A: Yes, softer alloys can handle higher SFM while harder alloys may require lower speeds within the range.

Q4: How does blade pitch affect speed selection?
A: Finer pitch blades generally perform better at higher speeds within the recommended range.

Q5: What are signs of incorrect speed?
A: Excessive heat, poor surface finish, blade teeth stripping, or workpiece vibration indicate speed issues.