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Gear Blocks
The gear blocks, released only in set 872, were designed to
gear down the 4.5 or 12 volt Technic motors in a compact space. One gear block
was shaped the same as the motor and allowed in-plane transmission. The other,
a rectangular shape, attached to the motor with an adaptor block and allowed a
90 degree change in transmission direction. | |||||||||
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| Gear block, 3 x 2-1/3 x 3-2/3 | |||||||||
| x186 | Technic 20x Reduction Block 3 x 4 x 2 & 1/3 PR 1978-1989. 1:20 gear reduction. |
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| Gear block, 4 x 2 x 4 | |||||||||
| 768 | Technic Gear Block 2 x 8 x 3 LD, PR 1978-1989. 1:20 gear reduction. |
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| 3691 | Gear block adaptor, 4 x 4 x 4 Technic Holder Block 4 x 4 x 3 LD, PR 1978-1989 |
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