TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key

TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key

$999.99 CAD
$999.99 CAD
TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key

TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key

$999.99 CAD
$999.99 CAD

Professional 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck (Plain Back)

The TOP-TOOL four-jaw independent chuck holds round, square, rectangular, and irregular parts by adjusting each jaw separately. Unlike a self-centering scroll chuck, you can dial in concentricity with a dial indicator or intentionally offset the work for boring or turning eccentric features. This listing is the plain back configuration—machine an adapter plate to match D1, D2, and the bolt pattern (adapter not included).

Envelope reference: combined internal-jaw and external-jaw ranges cover approximately 100–1000 mm (3.94–39.37 in) depending on jaw orientation and setup.

Materials

Component Material
Body High-grade gray cast iron (HT200 / HT300 class, series dependent)
Jaws Hardened steel
Screw Hardened steel 

Clamping ranges

Internal jaws (A–A1): 100–680 mm — typical OD gripping with jaws in the standard orientation.

External jaws (B–B1): 250–1000 mm — clamping larger diameters / reverse-jaw style holding per factory chart.

Use the jaw positions and factory instructions that match your operation; the overall span above is a quick reference only.

Key Features

  • Independent jaws: Four separate adjustments for square, round, or off-center work.
  • Plain back (D1/D2): Recess diameter D1 = 320 mm, depth h = 15 mm; bolt circle D2 = 370 mm; 8× M20.
  • Through hole D3: 305 mm for bar work (confirm against your bar stock).
  • Heights: H = 236 mm overall, H1 = 145 mm body thickness reference.
  • T-Key included for jaw adjustment.

Technical Specifications

Dimensions from factory K72-series plain-back table; clamping from K72 clamping-range chart.

Parameter Value
Chuck diameter (D) 1000 mm (39.37 in)
D1 (mounting recess diameter) 320 mm
h (recess depth) 15 mm
D2 (bolt circle diameter) 370 mm
D3 (through hole) 305 mm
H (overall height) 236 mm
H1 (body thickness) 145 mm
Internal jaws (A–A1) 100–680 mm
External jaws (B–B1) 250–1000 mm
Mounting 8× M20
Net weight 395 kg

Applications

  • Shafts, rings, and rounds where you want manual control of runout.
  • Square or rectangular billets; weldments and castings with uneven OD.
  • Light eccentric turning when the machine and setup allow.

Compatibility

Lathe swing must clear diameter D and fully extended jaws. Build or purchase an adapter that matches D1, D2, and the listed bolt pattern.

Maintenance

Keep jaw slides clean; lubricate per factory practice with chuck grease or light oil suitable for slideways.

Safety

Never leave the chuck key engaged; respect safe RPM for size and balance.

Made with care

Heirloom quality

Premium materials

Classic styling

Styled With
TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key
  • TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key
  • TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key
  • TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key
  • TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key
  • TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key
  • TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key
  • TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key
  • TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key
  • TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key
  • TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key
  • TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key
  • TOP-TOOL 1000mm / 40-Inch 4-Jaw Independent Lathe Chuck, Plain Back, Clamping Range 100–1000 mm (3.94–39.37 in), T-Key
Materials

HT300 AISI1045 AISI 5140

Included Accessories

Chuck Key (T-Type) / Bolts
Details

Backplate not included.

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