impulce 2 IT8003 Assembly Instructions Manual page 10

Step3 Assemble The Pillow Block
Attach the Pillow Block(#20) to the Main Upright(#1)
using:
two Allen Bolts(#47) M12×40
four Washers(#59)
two Nylon Locknuts(#61) M12
two Spacer(#86)
8
13× 24×1.5
Φ Φ