Ball bearing swivel bases feature dual rows of Delrin® ball bearings that swivel freely even under high loads. Bases include stand-up springs and a U-adaptor to accept a variety of appropriate blocks.

Height (mm)
110 mm

Height (in)
4 5/16 in

Weight (g)
398 g

Weight (oz)
14 oz

Minimum line Ø (mm)
3 mm

Minimum line Ø (in)
1/8 in

Maximum line Ø (mm)
12 mm

Maximum line Ø (in)
1/2 in

Fastener spacing (mm)
19 mm

Fastener spacing (in)
3/4 in

Fasteners (mm)
5 FH mm

Fasteners (in)
#10 FH in

Use with
Big Bullet / Dinghy / 2.25" / little ratchets