Precision Expanding Dowels
Jergens Precision Expanding Dowels allow for fast and accurate location of twin vises on locator plates. The top and bottom half of the dowel expand separately. Aligns (2) holes concentrically and locks them into position. Both locking screws are accessed from the top of the pin.
Features, Benefits, & Product Specifications:
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Material: Alloy Steel
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Heat Treat: Case Hardened to 50-55 RC
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Self-centering and repeatable within ±0.0005" (0.013mm)
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Patented
Installation Instructions:
1. Remove the top screw, insert the dowel into the locating hole of the first part, and expand the bottom half with a hex wrench.
2. Replace the top screw, slide the locating hole of the second part over the dowel and expand the top half with a hex wrench.
Precision Expanding Dowels
Select a part number for CAD drawings, price and stock availability.
| Part Number | CAD | Unit | Nominal Diameter (In) | Nominal Length H (In) | Recommended Hole Diameter +0.001/-0.000 (In) | A DIA. +0.000/-0.001 (In) | B DIA. +0.000/-0.010 (In) | H1 +/- 0.005 (In) | L1 +/-0.005 (In) | Hex Key Size Bottom: Step 1 | Hex Key Size Top: Step 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 29401 |
|
Inch | 1/4 | 1/2 | 0.250 | 0.249 | 0.245 | 0.428 | 0.428 | 5/64 | 3/32 |
| 29402 |
|
Inch | 3/8 | 3/4 | 0.375 | 0.374 | 0.370 | 0.634 | 0.634 | 1/8 | 5/32 |
| 29403 |
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Inch | 1/2 | 1 | 0.500 | 0.499 | 0.495 | 0.881 | 0.881 | 5/32 | 3/16 |
| 29404 |
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Inch | 5/8 | 1 1/4 | 0.625 | 0.624 | 0.620 | 1.162 | 1.162 | 3/16 | 7/32 |
| 29405 |
|
Inch | 3/4 | 1 1/2 | 0.750 | 0.749 | 0.745 | 1.390 | 1.390 | 1/4 | 5/16 |
| 29406 |
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Inch | 1 | 2 | 1.000 | 0.999 | 0.995 | 1.758 | 1.758 | 3/8 | 1/2 |
| Part Number | CAD | Unit | Nominal Diameter (mm) | Nominal Length H (mm) | Recommended Hole Diameter +0.025/-0.000 (mm) | A DIA. +0.000/-0.025 (mm) | B DIA. +0.000/-0.254 (mm) | H1 +/- 0.13 (mm) | L1 +/-0.013 (mm) | Hex Key Size Bottom: Step 1 | Hex Key Size Top: Step 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 29451 |
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Metric | 10 | 20 | 10 | 9.98 | 9.88 | 17.45 | 17.45 | 3 | 4 |
| 29452 |
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Metric | 12 | 25 | 12 | 11.98 | 11.89 | 22.48 | 22.48 | 4 | 5 |
| 29453 |
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Metric | 14 | 28 | 14 | 13.97 | 13.89 | 24.74 | 24.74 | 4 | 5 |
| 29454 |
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Metric | 16 | 32 | 16 | 15.98 | 15.90 | 29.51 | 29.51 | 5 | 6 |
| 29455 |
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Metric | 20 | 38 | 20 | 19.98 | 19.89 | 35.31 | 35.31 | 6 | 8 |
Documents and Videos
Operating Manual- Operating Manual - 81600 ONLY
- Jergens Production Vise System
- Jergens Production Vises Features and Benefits
- Vertical Machine Solutions
- Horizontal Machine Solutions
- Hydraulic Production Vises
- Production Vises