Harken Radial 20 Self-Tailing Winch, Bronze, One Speed
- Brand:
- Harken
- Part no:
- 20STBBB
Image: mauripro.com
Where to buy
View on Amazonpaid link
Specifications
- Size
- 20
- Power ratio
- 19.2
- Speeds
- 1
- Self-tailing
- Yes
- Max line diameter
- 12 mm
- Drive
- Manual
- Base diameter
- 137 mm
- Gear ratio
- 2.76
- Weight
- 3.9 kg
Manuals
- Installation instructions (HTML)manualmachine.com
The Harken Radial size 20 is a self-tailing manual winch in bronze with a plain-top configuration. It runs in one speed, with a power ratio of 19.2 and a gear ratio of 2.76. The drum is 73 mm across and the base is 137 mm. It takes line up to 12 mm and weighs 3.9 kg.
Our take
A power ratio of 19.2 in one speed sets what this winch can do: there is no second speed to drop into when the load builds, and 12 mm is the largest line it takes. At 3.9 kg in bronze, it is a solid piece of hardware.
From our buying guide
A winch's size number sits close to its top power ratio, though not exactly, and first-gear ratios vary more between brands. Each maker publishes its own sizing chart, so use the chart from the maker you're buying.
Check before you buy:
- It fits your existing holes, since same-size winches from different makers need not share a bolt circle.
- The self-tailing jaws take your rope, since they have a range.
- You have the right bolts. Harken does not supply them, and the makers disagree about countersunk heads.
Read the full winch guide
Photo: Egor Myznik on Unsplash

