Polycast Shell Specifications
Sizes readily available: -
| Outside Diameter |
Wall Min. |
Wall Max. |
Length Max. |
| 13.93" |
0.69" |
2.83" |
246" |
| 14.25" |
0.69" |
3.39" |
246" |
| 16.25" |
0.69" |
2.91" |
316" |
| 16.91" |
0.69" |
3.58" |
246" |
| 18.30" |
0.69" |
3.24" |
316" |
| 20.25" |
0.81" |
3.81" |
349" |
| 22.37" |
0.81" |
3.81" |
349" |
| 23.50" |
0.81" |
3.18" |
361" |
| 24.37" |
0.88" |
2.88" |
361" |
| 24.59" |
0.88" |
2.88" |
400" |
| 24.95" |
0.88" |
2.75" |
246" |
| 26.65" |
0.88" |
3.57" |
400" |
| 27.50" |
0.88" |
3.75" |
400" |
| 30.57" |
1.19" |
3.75" |
317" |
| 31.74" |
1.19" |
3.09" |
317" |
| 32.58" |
1.19" |
2.63" |
348" |
| 36.91" |
1.19" |
3.27" |
317" |
Machining Stock Allowance: -
|
Outside Diameter Size |
Outside Diameter Allowance |
| Through |
24.38"/619.3mm |
0.38"/9.7mm |
| Over |
24.38"/619.3mm |
0.50"/12.7mm |
Some shells may require straightening and/or minor weld repair.
|
Outside Diameter Size |
Counterbore Allowance |
| Through |
20.25"/514.4mm |
0.31"/7.9mm |
| Over |
20.25"/514.4mm |
0.38"/9.7mm |
These tolerances typically yield a 70%-80% tooled surface.
Typical Chemistry and Properties: -
| C. |
Mn. |
Si. |
Fe. |
| 0.20% |
0.70% |
0.40% |
Rem. |
ASTM A27 Gr. N-1 Carbon Steel.
| Tensile Strength |
Yield Strength |
Elongation in 2" |
Hardness BHN |
Modulus of Elasticity in Tension |
| 483 MPa |
276MPa |
11% |
150 |
203,000 MPa |
| 70,000 psi |
40,000 psi |
n/a |
n/a |
29.5 x 106 psi |
Suction Roll Shells