PA 18″ – 63″ Large Diameter Chucks
- All steel body
- Standard 3-jaw closed center wedge chuck for general machining
- Hardened jaw ways and all internal parts
- Standard metric serrations 3.0mm serration pitch
Products
Atlas 3-Jaw Closed Center Power Chucks
| Model No. | Mount Width* | Jaw Stroke Dia | Sleeve Stroke | Gripping Capacity | Draw Bar Pull lb/f | Grip Force lb/f | Ma" RPM | Wt lbs | |
|---|---|---|---|---|---|---|---|---|---|
| Max | Min | ||||||||
| PA18-A11 | 1.06" | .630" | 1.378" | 17.71" | 5.19" | 18400 | 55977 | 2710 | 274 |
| PA21-A11 | 1.06" | .630" | 1.378" | 20.87" | 2.68" | 18400 | 61350 | 1940 | 367 |
| PA24-A11 | 1.06" | .630" | 1.378" | 24.02" | 5.98" | 18400 | 61350 | 1760 | 492 |
| PA24-A15 | 1.06" | .630" | 1.378" | 24.02" | 5.98" | 18400 | 61350 | 1760 | 492 |
| PA28-A11 | 1.06" | .630" | 1.378" | 27.95" | 1.37" | 18400 | 61350 | 1200 | 617 |
| PA28-A15 | 1.06" | .630" | 1.378" | 27.95" | 1.37" | 18400 | 61350 | 1200 | 617 |
| PA32-A11 | 1.06" | .787" | 1.496" | 31.49" | 7.08" | 22500 | 53900 | 900 | 705 |
| PA32-A15 | 1.06" | .787" | 1.496" | 31.49" | 7.08" | 22500 | 53900 | 900 | 705 |
| PA40-A11 | 1.06" | 1.181" | 2.244" | 39.37" | 11.42" | 40450 | 89900 | 500 | 1323 |
| PA40-A15 | 1.06" | 1.181" | 2.244" | 39.37" | 11.42" | 40450 | 89900 | 500 | 1323 |
| PA40-A20 | 1.06" | 1.181" | 2.244" | 39.37" | 11.42" | 40450 | 89900 | 500 | 1323 |
| PA50 | 1.06" | 1.181" | 2.244" | 49.21" | 11.42" | 40450 | 89900 | 450 | 1763 |
| PA55 | 1.06" | 1.181" | 2.244" | 53.12" | 11.42" | 40450 | 89900 | 400 | 2425 |
| PA63 | 1.06" | 1.181" | 2.244" | 62.99" | 11.42" | 40450 | 89900 | 350 | 3307 |
| *Add to dimension B for total width | |||||||||
| Dimensional Data (in inch) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Model | PA-18 | PA-21 | PA-24 | PA-28 | PA-32 | PA-40 | PA-50 | PA-55 | PA-63 |
| A | 17.71 | 20.87 | 24 | 27.95 | 31.49 | 39.37 | 49.21 | 55 | 63 |
| B | 4.48 | 4.92 | 4.92 | 5.9 | 5.9 | 7.09 | 7.09 | 7.8 | 7.8 |
| C | 11.81 | 14.96 | 14.96 | 14.96 | 14.96 | 20.47 | 20.47 | 28.35 | 28.35 |
| F | 0.236 | 0.236 | 0.236 | 0.236 | 0.236 | 0.314 | 0.314 | 0.314 | 0.314 |
| H | 9.25 | 13 | 13 | 13 | 13 | 18.25 | 18.25 | 25.5 | 25.5 |
| J | - | - | - | - | - | - | - | - | - |
| K | 6-M20 | 6-M22 | 6-M22 | 6-M22 | 6-M24 | 6-M24 | 6-M24 | 6-M24 | 6-M24 |
| L | 1.18 | 1.22 | 1.22 | 1.22 | 1.38 | 1.38 | 1.38 | 1.38 | 1.38 |
| M | 1.69 | 2.36 | 2.36 | 2.36 | 2.99 | 3.94 | 3.94 | 3.94 | 3.94 |
| N max. | 4.25 | 3.38 | 4.92 | 3.86 | 3.91 | 5.77 | 5.77 | 5.77 | 5.77 |
| N min. | 3.93 | 3.07 | 4.61 | 3.46 | 3.52 | 5.18 | 5.18 | 5.18 | 5.18 |
| O max. | 1.98 | 3.68 | 3.68 | 5.63 | 7.08 | 8.86 | 9.25 | 16.73 | 20.67 |
| O min. | 0.91 | 0.96 | 0.96 | 1.18 | 1.18 | 1.18 | 1.18 | 1.18 | 1.18 |
| P max. | 3.62 | 3.82 | 3.82 | 1.37 | 1.1 | 1.38 | 1.38 | 1.38 | 1.38 |
| P min. | 0.88 | 2.44 | 2.44 | -0.118 | -0.39 | -0.87 | -0.87 | -0.87 | -0.87 |
| Q | 1.97 | 2.56 | 2.56 | 2.95 | 2.95 | 3.35 | 3.35 | 3.35 | 3.35 |
| R | 1 | 0.984 | 0.984 | 9.84 | 1 | 0.984 | 0.984 | 0.984 | 0.984 |
| S | 2.16 | 2.165 | 2.17 | 2.56 | 2.36 | 2.539 | 2.559 | 2.559 | 2.559 |
| T | M30x3.5 | M30x3.5 | M30x3.5 | M30x3.5 | M30x3.5 | M36x4.0 | M36x4.0 | M36x4.0 | M36x4.0 |
| U | 0.078 | 0.118 | 0.118 | 0.354 | 0.236 | -0.159 | -0.159 | -0.159 | -0.159 |
| V | 2.36 | 2.36 | 2.36 | - | - | - | - | - | - |
| W | 2.4 | 2.8 | 2.8 | 2.95 | 3.19 | 4.17 | 4.17 | 4.17 | 4.17 |
| X | 5.31 | 7.09 | 7.09 | 6.3 | 6.3 | 7.87 | 7.87 | 7.87 | 7.87 |