The latest deal brings the total value of purchases in the last 12 months to £35m.
The new order consists of 21 Cat 320ELs and five 312Es, adding to the fleet of 109 excavators purchased earlier in the year and 463 C series telehandlers purchased in late 2013.
It takes the total number of new Cat core fleet products purchased in the last 12 months to 598 units.
Hewden Director Mark Hogg, said: “Our core fleet next day delivery guarantee has been a real success, with the 109 excavators previously purchased from Finning proving to be very popular.
“This latest purchase is testament to the success of our ongoing relationship with Finning and shows just how important the combination of Cat equipment and service support is in the competitive market of plant hire.”