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Woodruff Keys

Woodruff Key

Woodruff Keys are used for locking gears and pulleys to shafts. On the shaft, they fit into a keyseat, which is a circular pocket that retains the key. An exposed portion of the key fits into a rectangular groove, often called the keyway, in the gear or pulley. Because the keyseat is circular, the key will self-adjust to angled spines. The 200-series is full radius; all other Woodruff Keys have a flat bottom. See our Woodruff Key Dimensions reference charts.

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Code Product Qty. Package Qty. Carton  
KY103-8102 1/16 x 1/4" (0.248" Lng) Woodruff Key #201
KY103-9102 1/16 x 5/16" (0.311" Lng) Woodruff Key #206
KY103-0102 1/16 x 3/8" (0.374" Lng) Woodruff Key #211
KY103-1102 1/16 x 1/2" (0.491" Lng) Woodruff Key #1
KY113-7152 3/32 x 5/16" (0.311" Lng) Woodruff Key #207
KY113-8152 3/32 x 3/8" (0.374" Lng) Woodruff Key #212
KY113-9152 3/32 x 1/2" (0.491" Lng) Woodruff Key #2
KY113-0152 3/32 x 5/8" (0.612" Lng) Woodruff Key #4
KY113-1152 1/8 x 3/8" (0.374" Lng) Woodruff Key #213
KY113-2152 1/8 x 1/2" (0.491" Lng) Woodruff Key #3
KY113-3152 1/8 x 5/8" (0.612" Lng) Woodruff Key #5
KY113-4162 1/8 x 3/4" (0.740" Lng) Woodruff Key #7
KY113-5162 5/32 x 5/8" (0.612" Lng) Woodruff Key #6
KY113-6162 5/32 x 3/4" (0.740" Lng) Woodruff Key #8
KY113-7162 5/32 x 7/8" (0.866" Lng) Woodruff Key #10
KY103-2102 3/16 x 5/8" (0.612" Lng) Woodruff Key #61
KY103-3102 3/16 x 3/4" (0.740" Lng) Woodruff Key #9
KY103-4112 3/16 x 7/8" (0.866" Lng) Woodruff Key #11
KY103-5112 3/16 x 1" (0.992" Lng) Woodruff Key #13
KY103-6112 3/16 x 1 1/8" (1.114" Lng) Woodruff Key #16
KY103-7112 3/16 x 1 1/4" (1.240" Lng) Woodruff Key #19
KY103-9112 3/16 x 2 1/8" (1.380" Lng) Woodruff Key #126
KY103-8112 3/16 x 2 1/8" (1.723" Lng) Woodruff Key #26
KY113-3142 7/32 x 7/8" (0.866" Lng) Woodruff Key #12
KY113-4152 7/32 x 1" (0.992" Lng) Woodruff Key #14
KY113-5152 7/32 x 1 1/8" (1.114" Lng) Woodruff Key #17
KY113-6152 7/32 x 1 1/4" (1.240" Lng) Woodruff Key #20
KY103-0112 1/4 x 3/4" (0.740" Lng) Woodruff Key #91
KY103-1112 1/4 x 7/8" (0.866" Lng) Woodruff Key #A
KY103-2112 1/4 x 1" (0.992" Lng) Woodruff Key #15
KY103-4122 1/4 x 1 1/8" (1.114" Lng) Woodruff Key #18
KY103-5122 1/4 x 1 1/4" (1.240" Lng) Woodruff Key #21
KY103-6122 1/4 x 1 3/8" (1.362" Lng) Woodruff Key #22
KY103-7122 1/4 x 1 1/2" (1.484" Lng) Woodruff Key #24
KY103-9122 1/4 x 2 1/8" (1.380" Lng) Woodruff Key #127
KY103-8122 1/4 x 2 1/8" (1.723" Lng) Woodruff Key #27
KY103-0122 1/4 x 2 3/4" (2.137" Lng) Woodruff Key #R
KY103-1122 1/4 x 2 3/4" (2.000" Lng) Woodruff Key #RX
KY103-2122 5/16 x 1" (0.992" Lng) Woodruff Key #B
KY103-3122 5/16 x 1 1/8" (1.114" Lng) Woodruff Key #C
KY113-4132 5/16 x 1 1/4" (1.240" Lng) Woodruff Key #D
KY113-5132 5/16 x 1 3/8" (1.362" Lng) Woodruff Key #23
KY113-6132 5/16 x 1 1/2" (1.484" Lng) Woodruff Key #25
KY113-8132 5/16 x 2 1/8" (1.380" Lng) Woodruff Key #128
KY113-7132 5/16 x 2 1/8" (1.723" Lng) Woodruff Key #28
KY113-9132 5/16 x 2 3/4" (2.317" Lng) Woodruff Key #S
KY113-0132 5/16 x 2 3/4" (2.000" Lng) Woodruff Key #SX
KY113-1132 3/8 x 1" (0.992" Lng) Woodruff Key #152
KY113-2132 3/8 x 1 1/4" (1.240" Lng) Woodruff Key #E
KY113-3132 3/8 x 1 3/8" (1.362" Lng) Woodruff Key #F
KY113-4142 3/8 x 1 1/2" (1.484" Lng) Woodruff Key #G
KY113-6142 3/8 x 2 1/8" (1.380" Lng) Woodruff Key #129
KY113-5142 3/8 x 2 1/8" (1.723" Lng) Woodruff Key #29
KY113-7142 3/8 x 2 3/4" (2.317" Lng) Woodruff Key #T
KY113-8142 3/8 x 2 3/4" (2.000" Lng) Woodruff Key #TX
KY113-9142 7/16 x 2 3/4" (2.317" Lng) Woodruff Key #U
KY113-0142 7/16 x 2 3/4" (2.000" Lng) Woodruff Key #UX
KY113-1142 1/2 x 2 3/4" (2.317" Lng) Woodruff Key #V
KY113-2142 1/2 x 2 3/4" (2.000" Lng) Woodruff Key #VX