Taper Adapter Mt3 - Jt4

PACK SIZE

The price displayed for this product is the unit price of the product. Where a PACK SIZE is indicated, this refers to the recommended ordering quantity and is also indicative of how many of these products are packaged in a box.

Model: CMJT4-2
Weight: 0.48kg
Pack Dim: 145.00mm x 34.00mm x 34.00mm
UPC: 6009515888497

Price:

R 165.37

Ex VAT: R 143.80

Available Options

Stockist

Tork Craft Taper Adapter — MT3 to JT4 (Morse → Jacobs)

Adapt machines with an MT3 (Morse Taper #3) spindle or arbor to accept JT4 (Jacobs Taper #4) drill chucks. This hardened, precision-ground adapter ensures concentric seating for smooth, accurate drilling on drill presses, lathe tailstocks and milling machines (drill mode).

Extra Information

Thoroughly clean and degrease both tapers before assembly.
Seat the chuck with a firm hand press; avoid hammering on the chuck body.
Remove using the machine’s eject feature or correct taper drift/wedge.

Pro Tip

Mark the adapter and chuck with a reference line; reassemble to the same orientation to preserve best concentricity.
If insertion feels rough, lightly stone any raised burrs on the tapers—never sand or file the seating surfaces.

Features

Conversion: MT3 male shank → JT4 male taper (for JT4-bore chucks).
Precision-ground tapers for low run-out and reliable grip.
Hardened steel construction for durability in workshop use.
Smooth finish for clean seating and easy release.
Industry-standard geometry compatible with common machines and arbors.

Benefits

Versatility: mount JT4 chucks on MT3 machines without replacing arbors.
Accuracy: concentric fit improves hole quality and tool life.
Quick setup: press-fit assembly—no special tools needed.

Safety

Disconnect power before installing/removing chucks or adapters.
Ensure tapers are fully seated; avoid side-loading small drills.
Use rotary drilling only—do not use hammer/impact with taper-mounted chucks.
Wear eye protection and secure the workpiece properly.

Specifications

Description	Spec
Brand	Tork Craft
Model / Cat No.	CMJT4-2
Product Type	Taper adapter
Input Taper (Machine Side)	MT3 (Morse Taper #3), male
Output Taper (Chuck Side)	JT4 (Jacobs Taper #4), male
Material	Hardened, precision-ground steel
Finish	Ground, smooth seating surfaces
Typical Uses	Fitting JT4 drill chucks to MT3 drill presses, lathe tailstocks, mills (drill mode)