RD-820

Column Diameter8.29 in.
Head Travel25.20 in.
Column to Spindle33.46 in.

Overview

This is a high performance machine ideal for drilling, tapping , boring, reaming, lapping, screwing, counter boring, spot facing, and much more, on materials such as cast iron and steel.

  • 8.29” column diameter
  • MT#4 spindle, 3 HP motor
  • 33.46” column to spindle center
  • Drilling : 1.968” cast iron, 1.259” steel
  • Boring : 4.125” cast iron, 2.75” steel
  • Hardened and ground arm slide ways and gears
  • Arm elevation controlled by electric motor
  • Manually operated arm, head, clamping
  • Counter balanced spindle (spring action) to increase durability
  • Safety device prevents arm from dropping even when bronze nut is worn out
  • T-slots and drain channels on box table

Features

Auto reverse tapping function

Spindle depth setting with automatic kickout

Specs

InchMetric
Diameter of column8.29 inches210 mm
Distance from column surface to spindle center, max.33.46 in.850 mm
Distance from column surface to spindle center, min.9.06 in.230 mm
Travel of spindle head25.2 in.640 mm
Distance from base surface to spindle end, max.47.64 in.1210 mm
Distance from base surface to spindle end, min.14.76 in.375 mm
Elevating height of arm24.61 in.625 mm
Effective area of table23.62 x 17.52 x 14.96 in.600 x 445 x 380 mm
Dimensions of base49.21 x 25.20 x 6.30 in.1250 x 640 x 160 mm
Taper hole in spindle MT #4
Stoke of spindle8.27 in.210 mm
R.P.M. of spindle (rpm range x steps)73-1247 x 6 Steps73-1247 x 6 Steps
Feed of spindle (1PR x steps)88-1500 x 6 Steps88-1500 x 6 steps
Main motor (HP)3 HP3 HP
Elevating motor (HP)1 HP1 HP
Clamping motor for column and gear-box (HP)Manual ClampManual Clamp
Clamping motor for arm (HP)Manual ClampManual Clamp
Coolant pump (HP)1/8 HP1/8 HP
Machine height from floor, max.91.34 in.23.20 mm
Measurement (LxWxH)66 x 32 x 87 in.1680 x 810 x 2210 mm
Approximate shipping weight2976.25 Lbs.1350 Kg
Cast IronInchMetric
Drilling1.97 in.50 mm
Capacity Tapping1.26 in.32 mm
Boring4.17 in.106 mm
SteelInchMetric
Drilling1.26 in.32 mm
Capacity Tapping0.98 in.25 mm
Boring2.75 in.70 mm
Total Power ConsumptionInchMetric
220V5KVA/15 amps5KVA/15 amps
440V5KVA/7.5 amps5KVA/7.5 amps

Accessories

Standard Accessories

  • Box table
  • Coolant system
  • Work light
  • 220V or 440V

Optional Accessories

  • Tilting box table

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