Crankshaft key (Woodruff key) 4x6,5x16

Crankshaft key 4 × 6.5 × 16 mm — a segment key, also called a half-moon or a Woodruff key: it sits in the shaft groove and stops the flywheel turning on it.

• The three figures in the name are the thickness 4 mm, the height 6.5 mm and the length 16 mm; that is the order they are marked in on this category's maker's drawing
• The bottom is curved to follow the shaft groove, the top is flat — the same profile can be seen in every photo in this category
• You will know a worn key by its rubbed side and rounded edges — one like that already lets the flywheel move on the shaft, and the ignition timing runs away with it
• The same category holds a 3 × 6.5 × 16 mm key — the same height and length, but 1 mm thinner
• Crankshafts and the needle bearing for the gudgeon pin sit in the same category

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

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