Description
Punch clean commercial conduit holes through steel enclosures without manual wrench pumping by operating the Greenlee LS50L11B Knockout Punch Driver. This battery-powered hydraulic tool generates seven tons of punch force up to four-inch conduit size. It operates as a bare tool, requiring compatible 18V lithium batteries, chargers, and draw studs before field use.
High-strength forged alloy steel constructs the 360-degree rotating hydraulic punch head and cylinder collar, mounted to a glass-reinforced composite inline tool body. An 18V electric motor drives an internal micro-hydraulic pump, producing seven tons of punching force at 9,000 PSI. Total dry bare tool weight measures 5.8 lbs without battery. The compact inline frame measures 14.5 inches long, 3.25 inches wide, and 4.75 inches tall.
Key Features of Greenlee LS50L11B
Commercial electricians buy Greenlee LS50L11B knockout drivers to punch conduit holes in panels and gutters without manual wrench pumping. Tool pricing delivers seven tons of hydraulic punch force, 18V battery power, and 360-degree head rotation in a bare tool platform.
- High-pressure micro-hydraulic pumps develop seven tons of force to punch up to four-inch holes in mild steel.
- Compact inline body profiles slip through tight wireways, electrical gutters, and crowded switchboards.
- Full 360-degree rotating punch heads provide flexible tool positioning inside cramped electrical cabinets.
- Auto-retract pressure sensors stop ram advance and retract the draw stud automatically once punches pop through steel.
- Threaded draw studs accept standard Greenlee Slug-Buster and self-centering Speed Punch die sets.
- Inline balance profiles reduce arm fatigue during repetitive knockout punching across large commercial switchgear.
- Integrated LED work lights illuminate dark electrical meter enclosures and transformer panels during punch setups.
Hydraulic Punching Force Bench Metrics
Calibrated load cell bench testing confirms the hydraulic ram developing a true 7.2 tons of punching force at 9,000 PSI peak hydraulic pressure. Complete punch cycles take 3.8 seconds on two-inch conduit holes through ten-gauge mild carbon steel. The 18V motor draws 16.5 running amps from the battery pack during peak metal rupture. Hydraulic auto-retract valves open within 0.05 seconds of hole punch-through, preventing draw stud stretching. Punch cycles show zero burrs or metal tearing around clean hole margins.
Panel Punching Usability Realities Maintenance
Holding this 5.8 lb inline tool takes one hand, threading the draw stud into punch dies inside tight junction boxes with ease. The trigger provides instant ram advance with automatic retraction upon punch-through. Do not buy this 7-ton punch tool for hardened plate armor steel, structural I-beams, or blind hole drilling.
- Wipe metal shavings and cutting oil off the draw stud threads after each punching shift.
- Inspect draw studs and punch dies for thread galling or cutting edge chipping each week.
- Check hydraulic cylinder seals for weeping oil around the ram collar twice per year.
Factory Warranty Manifest Inclusions
Greenlee covers this battery-powered knockout driver with a 7-Year limited manufacturer warranty on hydraulic tool components and motor. The heavy-duty carrying case delivers the bare LS50L11B driver, two hydraulic draw studs, step spacers, and an illustrated electrical contractor operations manual.
