Expanders are used for enlarging the hole after the initial bore is made. The expander is designed for use with a pulling attachment and a steel cable. In addition, it must be assisted with a power winch or some other pulling equipment to assure continued tension on the cable. Front End Expanders are recommended for occasional use only.

expander
Part Number Grundomat Model Exp. Size (In)
70836-45 75ZS 4.50
70836-50 75ZS 5.00
70695-52 95ZS 5.25
70695-60 95ZS 6.00
70696-60 110ZSK 6.00
70697-63 130Z 6.50
70697-80 130Z 8.00
70067-57 145Z 6.50
70699-80 145Z 8.00
70700-80 160EF 8.00
70698-98 180EF 10.00

**Other sizes are available upon request.