• Challenge EH-3 hydraulic three-spindle paper drill with adjustable side tables, shown on a white background.
  • Challenge Machinery EH-3 Hydraulic Drill Video Demonstration
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Challenge

Challenge EH-3 Multiple-Spindle Drill

Challenge EH-3 Multiple-Spindle Drill

Item Number: CMC-391-11D-SB
Model
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Challenge EH-3 — Three-Spindle Hydraulic Paper Drill

The original multi-spindle drill since 1961. Rugged steel and cast-iron construction, powerful hydraulic drive, and fast head adjustments for reliable, high-volume drilling.

The EH-3 delivers accurate, clean holes with minimal operator fatigue. Taper-fit shanks center bits securely, automatic head return protects blocks and extends bit life, and the standard 2-1/2″ capacity lets you drill up to 25% more stock per stroke.

Key Features

  • Powerful hydraulic operation with foot-pedal control
  • 2-1/2″ drilling capacity; drills 1, 2, or 3 holes in a single stroke
  • Automatic drill-head return reduces block wear and extends bit life
  • Fast head spacing and flexible backgauge adjustments
  • Center head stationary; outside heads adjustable
  • Taper-fit shanks seat bits centrally for clean, accurate holes

Included

  • Three 2-1/2″ capacity 1/4″ hollow drill bits
  • Three 2-1/2″ capacity 5/16″ hollow drill bits
  • Twelve drilling blocks
  • Hydraulic foot pedal
  • Hollow-bit hand sharpener / chip removal tool
  • Tool kit

Specifications — General

Number of drill heads 3
Drill sizes (2″ capacity) 1/8″–1/2″ (3–13 mm)
Drill sizes (2-1/2″ capacity) 1/4″–1/2″ (6–13 mm)
Range between drills 2-3/4″ to 4-1/2″ (7–11 cm)
Range between outside drills 5-1/2″ to 9″ (14–23 cm)
Maximum drilling capacity 2-1/2″ (63 mm)
Strokes per minute (adjustable) Up to 18
Backgauge adjustment 0–4-1/2″ (0–11 cm)
Vertical adjustment of individual heads 1/4″ (6 mm)

Specifications — Dimensions

Table size 19-1/2″ × 31-1/2″ (50 × 80 cm)
Table height 37″ (94 cm)
Overall height 59-1/4″ (151 cm)
Floor space needed 36″ × 41-1/2″ (91 × 105 cm)
Net / shipping weight 520 lb / 570 lb (236 / 259 kg)

Specifications — Electrical

Power 1-phase, 60 Hz, AC
Motors Pump: 1/2 HP; Spindle motor: 1 HP
Voltage / current 208 V, 18 A (service 30 A) or 230 V, 17 A (service 30 A)
Compliance UL Listed

Applications

Binders and manuals, NCR and carbonless sets, presentation kits, high-volume ring-binder patterns, in-plant and commercial print finishing.

Benefits

  • Consistent, clean holes with minimal setup time
  • Higher throughput from 2-1/2″ capacity and three-spindle drilling
  • Reduced wear and longer bit life with automatic head return
  • Durable build for decades of reliable shop service

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