Crankshaft key (Woodruff key) 3x6,5x16

Crankshaft key 3 × 6,5 × 16 mm — a segment key, also called a half-moon or Woodruff key: a steel part with a flat top edge. It sits in the shaft's groove and holds the flywheel so it cannot turn on the shaft.

• Three numbers in the name — thickness 3 mm, height 6,5 mm and length 16 mm; that is the order the maker's drawing for this category marks them in
• The bottom is curved to match the shaft's groove, the top is flat — the same profile is seen in every photo in this category
• A worn key is recognised by a rubbed-flat side and rounded edges — a key like that already lets the flywheel shift on the shaft, and the ignition timing drifts along with it
• The same category has a 4 × 6,5 × 16 mm key — the same height and length, just 1 mm thicker
• Crankshafts and the needle roller gudgeon-pin bearing are in the same category
• Supplier code 2743 — quote it again when ordering

We write only what we know. The supplier calls this part a cotter pin, but the photo shows not a cotter pin but 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