Grundomat Front Expander. Stock number: GRU020
GRUNDOMAT Front End Expanders are used to enlarge the hole after the initial bore has been completed. They are designed for use with GRUNDOMAT pneumatic piercing tools when a larger final bore diameter is needed for pipe, conduit, cable, or utility installation.
Each expander is designed to be used with a pulling attachment and a steel cable. For proper operation, the expander must be assisted by a power winch or other pulling equipment to maintain continuous tension on the cable during the bore enlargement process.
Front End Expanders are recommended for occasional use only and are a practical accessory for contractors who need to increase bore size after the pilot bore has already been made.
Available Front End Expanders
| Part Number | GRUNDOMAT Model | Expander Size O.D. |
| 07083730 | 65P | 3.00 in. |
| 07083645 | 75P | 4.50 in. |
| 07083650 | 75P | 5.00 in. |
| 07068555 | 85P | 5.50 in. |
| 07069552 | 95P | 5.25 in. |
| 07069560 | 95P | 6.00 in. |
| 07069660 | 110P | 6.00 in. |
| 07069763 | 130P | 6.50 in. |
| 07069780 | 130P | 8.00 in. |
| 07069980 | 145P | 8.00 in. |
| 07070080 | 160P | 8.00 in. |
| 07069898 | 180P | 10.00 in. |
Features
- Used to enlarge the bore after the initial hole is completed
- Designed for use with GRUNDOMAT pneumatic piercing tools
- Requires a pulling attachment and steel cable
- Must be used with a power winch or other pulling equipment
- Helps maintain cable tension during bore enlargement
- Available in multiple outside diameters for different GRUNDOMAT models
- Recommended for occasional use only
GRUNDOMAT Front End Expanders are a useful accessory for contractors who need to increase bore diameter after the initial underground piercing pass, while using controlled pulling force to support a smoother expansion process.
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