5/8 inch drive ratchet HD-7
1927 Catalog Drawing vs 1929 ratchet (15 tooth)
5/8 inch drive ratchets
The 5/8 inch drive was first offered in 1923 and continued in some form into the 1970s. There is a huge gap in the catalogs and these ratchets were offered for 8 years (in the catalogs). The 3/4 inch ratchet is exactly the same. Snap on names these -– Heavy Duty – and then does not define the square size (5/8 drive). During the early period the 9/32, ½, 5/8 and 7/8 drives were the offerings. Later the 1/4, 3/8, 1/2, 3/4 were standards
Stock Number | Description | Date range |
HD-7 | Ratchet (15 tooth) | 1923 – 1931 |
HD-7A | Extra Socket receiving plug | 1925 – 1931 |
HD-7B | Extra Socket receiving plug 5/8 handle 7/8 drive (an adaptor) | 1925 – 1927 |
HD-7C | Plug with handle | 1927 – 1929 |
HD-8 | 5/8 ½ ratchet plug | 1929 – 1931 |
The HD-7 ratchet was riveted closed with 4 rivets. The plug is an HD7A
Ratchet
The ratchet is the standard – to reverse take the plug out and put it in the other way.
The ratchet is the standard – to reverse take the plug out and put it in the other way. Very simple.
Bridge from 5/8 to 3/4 inch drive
Here is a way to bridge the Heavy Duty – 5/8 inch drive to the “new” 3/4 inch drive
This allows a 5/8 ratchet to be used for 3/4 inch drive socket. Very simple.