Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
ISO 28927-8:2009 — Hand-held portable tools — Vibration test for saws and filing machines
Laboratory measurement of hand-transmitted vibration for reciprocating and oscillating cutting tools | Engineering guide
Introduction to ISO 28927-8
ISO 28927-8:2009 specifies a laboratory method for measuring hand-transmitted vibration emission at the handles of hand-held power-driven saws, polishing and filing machines with reciprocating action, and small saws with oscillating or rotating action. Replacing ISO 8662-12:1997, it covers a diverse family of cutting and finishing tools.
This part covers reciprocating saws, jigsaws, files with reciprocating action, and small circular saws with oscillating or rotating action.
Key Technical Requirements
Machine-Specific Test Conditions
Each machine type within this family requires specific test conditions. Reciprocating saws are tested cutting standardized wood or metal workpieces, while oscillating tools are tested under controlled load conditions.
| Machine Type | Test Task | Workpiece Material | Integration Time |
|---|---|---|---|
| Reciprocating saw | Cutting through workpiece | Wood or steel (specified) | ≥ 8 s |
| Jigsaw | Cutting along a line | Plywood or metal sheet | ≥ 8 s |
| Filing machine | Surface filing | Steel plate | ≥ 8 s |
| Oscillating saw | Plunge or flush cutting | Wood or drywall | ≥ 8 s |
The vibration characteristics of saws vary significantly with blade condition, workpiece material, and feed force. Worn or damaged blades can increase vibration by 200% or more!
Engineering Design Insights
This standard addresses the challenge of measuring vibration on tools with highly variable operating conditions. The reciprocating action of saws creates periodic vibration patterns that must be captured over sufficient integration time to obtain representative values.
For oscillating tools (multi-tools), the vibration measurement is particularly challenging because the oscillating action creates complex three-dimensional vibration patterns. The prescribed transducer locations must be carefully selected to avoid the influence of the tool oscillating head.
The standard approach of using real cutting tasks rather than simulated loads ensures that the measured vibration is representative of real-world operating conditions.
Frequently Asked Questions
Q: Does the blade type affect vibration measurements?
A: Yes, blade tooth geometry, set pattern, and material significantly affect vibration. The standard specifies standardized blades for testing.
A: Yes, blade tooth geometry, set pattern, and material significantly affect vibration. The standard specifies standardized blades for testing.
Q: Are battery-powered saws covered by this standard?
A: Yes, regardless of power source.
A: Yes, regardless of power source.
Q: How does the cutting direction affect measurements?
A: Cutting direction influences the vibration transmission path to the handles. The standard specifies the cutting orientation for each machine type.
A: Cutting direction influences the vibration transmission path to the handles. The standard specifies the cutting orientation for each machine type.
