Description
The Viadana 89.51 is a compact, high-quality single-sheave block designed for sailboat rigging — ideal for halyards, sheets, control lines or other rope runs where reliability, smooth operation, and adequate load capacity matter. It belongs to Viadana’s “strengthened / ball-bearing” block line, meaning it uses stainless-steel bearing balls between steel covers to evenly distribute load and withstand sustained stress.
| Sheave size | 34mm / 1 5/16″ |
| Max line size | 8mm / 5/16″ |
| Overall Height | 66mm / 2 5/8″ |
| Weight | 38 grams / 1.34 ounces |
| Breaking Load | 800 kg / 1,736 lbs |
| Max. Working Load | 300 kg / 661 lbs |
“We appreciate your patience with this product, please allow 2-3 weeks for fulfillment. We will ship the balance of your order once available”






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