Our inventory of NOV (Shaffer) Variable Bore Rams ranges from 7-1/16 inches to 21-1/4 inches, with working pressures of 2M, 3M, 5M, 10M and 15M.
Click here to download our variable bore ram specification chart.
Please refer to the graphs below for variable bore ram specifications:
| Bore Size (inches) | 7-1/16" | 7-1/16" | 7-1/16" | 11" | 11" | 11" | 13-5/8" | 13-5/8" | 13-5/8" | 18-3/4" | 18-3/4" | 18-3/4" | 20-3/4" | 21-1/4" |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Working Pressure (psi) | 5M | 10M | 15M | 5M | 10M | 15M | 5M | 10M | 15M | 5M | 10M | 15M | 3M | 2M |
| Type | "LWS" | "LWS" | "LWS" | "LWS" | "LWS" | "LWS" | "LWS" | "LWS" | "LWS" | "LWS" | "LWS" | "LWS" | "LWS" | "LWS" |
| VBR Ranges | 2-3/8" To 3-1/2" | * | * | 2-7/8" To 5" | 2-3/8" To 3-1/2" | * | 2-7/8" To 5-1/2" | 2-3/8" To 3-1/2" | * | * | * | * | 4-1/2" To 7" | 4-1/2" To 7" |
| VBR Ranges | * | * | * | * | 3-1/2" To 5" | * | 4-1/2" To 7" | 3-1/2" To 5" | * | * | * | * | * | * |
| VBR Ranges | * | * | * | * | * | * | * | 3-1/2" To 5-1/2" | * | * | * | * | * | * |
| VBR Ranges | * | * | * | * | * | * | * | 5" To 6-5/8" | * | * | * | * | * | * |
| Bore Size (inches) | 7-1/16" | 7-1/16" | 7-1/16" | 11" | 11" | 11" | 13-5/8" | 13-5/8" | 13-5/8" | 18-3/4" | 18-3/4" | 18-3/4" | 21-1/4" |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Working Pressure (psi) | 5M | 10M | 15M | 5M | 10M | 15M | 5M | 10M | 15M | 5M | 10M | 15M | 2M |
| Type | "LXT" | "LXT" | "LXT" | "LXT" | "LXT" | "LXT" | "LXT" | "LXT" | "LXT" | "LXT" | "LXT" | "LXT" | "LXT" |
| VBR Ranges | 2-3/8" To 3-1/2" | * | * | 2-7/8" To 5" | * | * | * | 3-1/2" To 5-7/8" | * | * | * | * | * |
| VBR Ranges | * | * | * | * | * | * | * | 4-1/2" To | * | * | * | * | * |
| Bore Size (inches) | 7-1/16" | 7-1/16" | 7-1/16" | 11" | 11" | 11" | 13-5/8" | 13-5/8" | 13-5/8" | 18-3/4" | 18-3/4" | 18-3/4" | 21-1/4" |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Working Pressure (psi) | 5M | 10M | 15M | 5M | 10M | 15M | 5M | 10M | 15M | 5M | 10M | 15M | 2M |
| Type | "NXT" | "NXT" | "NXT" | "NXT" | "NXT" | "NXT" | "NXT" | "NXT" | "NXT" | "NXT" | "NXT" | "NXT" | "NXT" |
| VBR Ranges | * | * | * | * | * | * | * | 3-1/2" To 5-1/2" | * | * | * | 3-1/2" To 5-1/2" | * |
| VBR Ranges | * | * | * | * | * | * | * | * | * | * | * | 3-1/2" To 5-7/8" | * |
| VBR Ranges | * | * | * | * | * | * | * | * | * | * | * | 3-1/2" To 6-5/8" | * |
| VBR Ranges | * | * | * | * | * | * | * | * | * | * | * | 5" To 7" | * |
| VBR Ranges | * | * | * | * | * | * | * | * | * | * | * | 5" To 7-5/8" | * |
| Bore Size (inches) | 7-1/16" | 7-1/16" | 7-1/16" | 11" | 11" | 11" | 13-5/8" | 13-5/8" | 13-5/8" | 18-3/4" | 18-3/4" | 18-3/4" | 21-1/4" |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Working Pressure (psi) | 5M | 10M | 15M | 5M | 10M | 15M | 5M | 10M | 15M | 5M | 10M | 15M | 2M |
| Type | "SL" | "SL" | "SL" | "SL" | "SL" | "SL" | "SL" | "SL" | "SL" | "SL" | "SL" | "SL" | "SL" |
| VBR Ranges | * | * | * | * | 2-3/8" To 3-1/2" | * | 2-7/8" To 5-1/2" | 2-3/8" To 3-1/2" | 3-1/2" To 5" | * | 3-1/2" To 5" | 3-1/2" To 5-1/2" | * |
| VBR Ranges | * | * | * | * | 3-1/2" To 5" | * | 4-1/2" To 7" | 3-1/2" To 5" | 5" To 7" | * | 3-1/2" To 5-1/2" | 3-1/2" To 5-7/8" | * |
| VBR Ranges | * | * | * | * | * | * | * | 3-1/2" To 5-1/2" | * | * | * | 5" To 7" | * |
| VBR Ranges | * | * | * | * | * | * | * | 5" To 6-5/8" | * | * | * | * | * |
| VBR Ranges | * | * | * | * | * | * | * | * | * | * | * | 5" To 7-5/8" | * |
| Bore Size (inches) | 7-1/16" | 7-1/16" | 7-1/16" | 11" | 11" | 11" | 13-5/8" | 13-5/8" | 13-5/8" | 18-3/4" | 18-3/4" | 18-3/4" | 21-1/4" |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Working Pressure (psi) | 5M | 10M | 15M | 5M | 10M | 15M | 5M | 10M | 15M | 5M | 10M | 15M | 2M |
| Type | "SLX" | "SLX" | "SLX" | "SLX" | "SLX" | "SLX" | "SLX" | "SLX" | "SLX" | "SLX" | "SLX" | "SLX" | "SLX" |
| VBR Ranges | * | * | * | * | * | * | 2-7/8" To 5-1/2" | 2-3/8" To 3-1/2" | * | 3-1/2" To 5" | 3-1/2" To 5" | 3-1/2" To 5-1/2" | * |
| VBR Ranges | * | * | * | * | * | * | 4-1/2" To 7" | 3-1/2" To 5" | * | 3-1/2" To 5-1/2" | 3-1/2" To 5-1/2" | 3-1/2" To 5-7/8" | * |
| VBR Ranges | * | * | * | * | * | * | * | 3-1/2" To 5-1/2" | * | 5" To 7" | 5" To 7" | 5" To 7" | * |
| VBR Ranges | * | * | * | * | * | * | * | 5" To 6-5/8" | * | * | * | 5" To 7-5/8" | * |