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18 in side-mount ball-bearing slide envelope (closed), 45 × 12.7 mm, Ø4.5 holes every 32 mm (check your slide)

Exact dimensions. True size, no printing tolerance added. Threads are plain cylinders at the major diameter.

STEP STL free, CC BY 4.0 (credit "Xem Studio")

Dimensions

length_in	12
height_mm	45.0
thickness_mm	12.7

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From the full sheet

Drawer slides for 15-series benches: 12 to 24 in slide envelopes and slide-to-upright plates: every size, notes, mating features and sources. How do I mount drawer slides on a T-slot frame?

Other sizes

12 in side-mount ball-bearing slide envelope (closed), 45 × 12.7 mm, Ø4.5 holes every 32 mm (check your slide)
plate for a 12 in slide between two 1515 uprights
14 in side-mount ball-bearing slide envelope (closed), 45 × 12.7 mm, Ø4.5 holes every 32 mm (check your slide)
plate for a 14 in slide between two 1515 uprights
16 in side-mount ball-bearing slide envelope (closed), 45 × 12.7 mm, Ø4.5 holes every 32 mm (check your slide)
plate for a 16 in slide between two 1515 uprights
plate for a 18 in slide between two 1515 uprights
20 in side-mount ball-bearing slide envelope (closed), 45 × 12.7 mm, Ø4.5 holes every 32 mm (check your slide)
plate for a 20 in slide between two 1515 uprights
22 in side-mount ball-bearing slide envelope (closed), 45 × 12.7 mm, Ø4.5 holes every 32 mm (check your slide)
plate for a 22 in slide between two 1515 uprights
24 in side-mount ball-bearing slide envelope (closed), 45 × 12.7 mm, Ø4.5 holes every 32 mm (check your slide)
plate for a 24 in slide between two 1515 uprights