Crankshaft key (Woodruff key) 3x3,7x9.6

Crankshaft key 3 × 3.7 × 9.6 mm: a steel Woodruff (half-moon) key that sits in the shaft groove and keeps the flywheel from turning on the shaft.

• The three figures in the name are thickness 3 mm, height 3.7 mm and length 9.6 mm; that is the order they are marked in on this category's maker drawing
• The bottom is curved to the shaft groove and the top is flat — the same profile can be seen in every photo in this category
• You will know a worn key by a rubbed side and rounded edges — a key like that already lets the flywheel move on the shaft, and the ignition timing drifts with it
• The same category has a 2.5 × 3.7 × 9.5 mm DERBI key — the same height, but 0.5 mm thinner
• Crankshafts and the needle roller gudgeon-pin bearing are in the same category

We write only what we know. The product name says "cotter pin", while the photo shows not a cotter pin but a Woodruff key (a segment key); these are different parts, so we are confirming the name with the maker. Before ordering, measure your old key or the shaft groove — thickness, height and length — and send us a photo; we will check it before you order.

24-month warranty · tel. +370 685 777 56