The "Cutter Milling and Gear Cutting Attachment" or "Slide Rest and Milling Attachment" as it was also called, was the same as the unit made for the 8 inch-precision lathe (early 608).
The cross feed was 4 inches and the vertical and angular movement 5 inches. Cutters up to a maximum diameter of 3 inches could be manufactured by the attachment, except ball cutters which could be generated in the range of 1/8 inch to 3 inches in diameter.
Index plates were supplied having 45, 56, 60, 64, 72, 80, 84 and 100 indents with others available to special order.
Rivett were inordinately proud of their lathes' ability to generate cutters and claimed that, even though they had milling machines of the very best kind in their workshops, nearly all their special angle cutters were made on either their No. 4 or 8-inch precision lathes.

The "Screwcutting and Power Taper-turning Attachment" with a feed to the top slide was also an option on the No. 3 and 8-inch Precision (608) lathes.
The slide had a travel of 4 inches and could turn tapers of up to 60 degrees.