Nut screwing unit SEM

automatedin-linefor screw assembly

Product overview
WEBER SEM and SEK are fixtured screwdriving units designed for automated installation of nuts and head‑heavy screws. SEM is intended for DIN, flange and special nuts; SEK is intended for head‑heavy screws. Both versions offer vacuum handling options and automatic feeding for reliable integration into assembly stations and lines.

Key features

• Screwdriving spindle with controlled and monitored pusher for head‑heavy screws, flanges and special nuts
• Automatic feed system with profiled feed tube (profile hose)
• Pneumatic or electric drive options
• Optional vacuum module to hold fasteners at the bit for hard‑to‑reach positions
• Fixed drive module to reduce moving mass and increase process stability

Highlights

• Automatic feeding for nuts and head‑heavy screws
• Suitable for interference contours up to 150 mm
• Screwdriving head in pusher/drawer design enabling feeding during screwdriving
• Vacuum module for retaining fasteners on the bit during the head stroke

Technical data (excerpt)
Series: 03 | 10 | 30 | 60 | 120
Torque range [Nm]: 0.3–3 | 1–10 | 3–30 | 6–60 | 12–120
Max. rotation speed [rpm]: 2,500 | 2,500 | 1,500 | 1,500 | 300
Head diameter (SEK) [mm]: 3–16 | 5–21 | 9–24 | 9–24 | 9–24
Nut size (SEM): M2–M4 | M3–M8 | M5–M10 | M5–M10 | M5–M10
Tool holding coupler: 3/16" | 1/4" | 5/16" | 7/16" | 7/16"
Bit stroke (examples) [mm]: 70, 90, 120, 160, 190, 200, 240
Axial force bit (1 | 3 | 6 bar) [N]: example values 30 | 90 | 180 … up to 160 | 480 | 960

Technical specifications

• Models: SEM (DIN, flange and special nuts) and SEK (head‑heavy screws)
• Feeding: profiled feed tube / automatic feed system; pusher modules for reliable feeding
• Vacuum handling: optional module to fix nuts/head‑heavy screws at the bit
• Drive: pneumatic or electric
• Torque coverage: 0.3–120 Nm depending on series
• Designed for integration into automated fixtured screwdriving systems and for use with interference contours up to 150 mm