Precision Collet Clamping Across a Wide Diameter Range
The manufacturer specifies a 2–34 mm workpiece clamping range in 1 mm increments when the fixture is equipped with the correctly sized compatible collet. Five metric collets—4, 8, 12, 16 and 20 mm—are supplied with the fixture; additional collets are required to cover the complete published diameter range.
Manufacturer accuracy data specifies a maximum indicated clamping runout of 0.01 mm. The inspection distance from the collet face changes according to the diameter of the test piece, as shown below.
| Workpiece diameter D | Inspection distance L | Published accuracy |
|---|---|---|
| 1.0–1.6 mm | 6 mm | 0.01 mm |
| 1.6–3.0 mm | 10 mm | 0.01 mm |
| 3.0–7.0 mm | 16 mm | 0.01 mm |
| 7.0–10.0 mm | 25 mm | 0.01 mm |
| 10.0–18.0 mm | 40 mm | 0.01 mm |
| 18.0–24.0 mm | 50 mm | 0.01 mm |
| 24.0–34.0 mm | 60 mm | 0.01 mm |
The 0.01 mm value refers to workpiece clamping/runout accuracy at the manufacturer-specified inspection distance. It should not be interpreted as angular indexing accuracy.
Technical Specifications
| Product type | Stainless steel EDM dividing and indexing fixture |
|---|---|
| Brand / series | HHIP Pro-Series |
| Model / SKU | 3903-1605 |
| Collet interface | ER32-type system specified by the manufacturer |
| Published clamping range | 2–34 mm in 1 mm increments, using the appropriate compatible collet |
| Included collets | 4, 8, 12, 16 and 20 mm |
| Published clamping/runout accuracy | 0.01 mm at the specified inspection distance |
| Index positions | 24 |
| Index spacing | 15° |
| Published angular indexing accuracy | 15° ±5 arc seconds |
| Center height | 60 mm ±0.5 mm |
| Through-hole diameter | 21 mm |
| Ingress protection | IP68 |
| Body construction | Stainless steel |
| Country of manufacture | Taiwan |
| Shipping weight | 30 lb |
Collet Compatibility Notice
The fixture includes five collets covering nominal diameters of 4, 8, 12, 16 and 20 mm. These five pieces do not provide every 1 mm size across the full published 2–34 mm range. Confirm the availability and compatibility of any additional diameter-specific collets before ordering the fixture for workpieces outside the included sizes.
Material notice: the fixture body is stainless steel, but the supplied collets and collet nut are not stainless steel. Clean, dry and protect these components following exposure to water or dielectric fluid.
Complete Your EDM Workholding Setup
Need additional diameters beyond the five supplied collets? Browse our ER32 collets and precision collet tooling to configure the fixture for your required workpiece sizes.
For other positioning and workholding applications, compare our rotary indexing fixtures and spacers. If your operation requires variable-angle indexing, gear cutting or conventional milling instead of wet EDM work, explore our milling-machine dividing heads.
Confirm Compatibility Before Ordering
Send us your EDM machine model, workpiece diameter, required index positions and dielectric-fluid conditions. We can help confirm the appropriate fixture and collet configuration before shipment.
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