What driver do I need for this motor?

It is rated at 6 A per phase, so pair it with a bipolar stepper driver rated above that current, such as a DM860-class or digital driver, and set the current limit to the motor's rating. A small A4988 or DRV8825 board cannot supply this.

Will it fit my existing NEMA 34 mounts?

The 86 x 114 mm frame and standard NEMA 34 hole pattern match most NEMA 34 brackets and machine bases. Check your coupler bore against the 14 mm keyed shaft before ordering.

Is 8.7 Nm enough for a CNC router?

For a mid-size router or mill moving a heavy gantry, 8.7 Nm is substantial and gives margin against skipped steps in deep cuts. Very large or fast machines may still need servo drives.

What comes in the box?

One NEMA 34 stepper motor with integrated windings. No driver, cable, pulley or mounting hardware is included.

How does it compare with a NEMA 23 motor?

It delivers much higher torque and handles heavier loads, but it is larger, heavier and draws far more current. Upgrading means a bigger driver and power supply, not just a motor swap.

Heavy Duty NEMA 34 Stepper Motor 14mm Key Shaft

Best price now

$371.95at VXB.com BearingsChecked Nov 3

Prices are checked against each store and labelled with when.

Visit VXB.com Bearings

Heavy Duty NEMA 34 Stepper Motor 14mm Key Shaft

Best price now

$371.95at VXB.com BearingsChecked Nov 3

Prices are checked against each store and labelled with when.

Visit VXB.com Bearings

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Price facts

Last seen at $371.95 at VXB.com Bearings on Nov 3.

Our take on the Heavy Duty NEMA 34 Stepper Motor 14mm Key Shaft

This is a single NEMA 34 frame stepper motor rated at 8.7 Nm holding torque and 6 A per phase, built for heavy-load CNC routers, mills and automated industrial rigs. The 86 x 114 mm frame and standard hole pattern fit common machine bases, and the 14 mm keyed shaft locks couplers and pulleys against slipping under sudden load. It is a high-current motor, so it needs a driver and power supply that can deliver 6 A per phase; buyers stepping up from NEMA 23 setups get far more torque but must plan the electronics around it. The steel housing is meant to hold step accuracy through long machining cycles.

Best forCNC router and mill builds needing high holding torqueRetrofits replacing smaller NEMA 23 motorsIndustrial automation with heavy linear loadsMakers with drivers rated for 6 A per phase

Pros

8.7 Nm holding torque for aggressive cuts
Standard NEMA 34 86 x 114 mm frame and hole pattern
14 mm keyed shaft resists coupler slip
6 A rating supports fast acceleration under load
Steel housing aimed at continuous duty

Cons

Needs a driver and supply rated for 6 A per phase
Heavy and bulky for small benchtop frames
No driver, cable or pulley included
Single motor only, no multi-axis kit

Heavy Duty NEMA 34 Stepper Motor 14mm Key Shaft prices at every store

VXB.com BearingsNew
Availability unknown
$371.95Checked Nov 3
Visit VXB.com Bearings

Heavy Duty NEMA 34 Stepper Motor 14mm Key Shaft price history

Lowest price we've seen: $371.95 on Nov 3 at VXB.com Bearings. Tracked across 1 store since Nov 3.

From VXB.com Bearings

8.7Nm torque, 6A coil current, 14mm (0.55in) keyed shaft, rigid mount
Steady rotational force for heavy load CNC routers, milling machines and automated industrial setups
Robust steel housing handles continuous machining cycles without overheating or losing step accuracy
86mm (3.39in) by 114mm (4.49in) frame fits standard machine bases
8.7Nm torque holds position precisely during aggressive cuts
Rated at 6 amps for fast acceleration under heavy loads

Materials: Cast iron chassis; steel housing; copper windings
Returns: Free, easy and hassle-free returns on every order
Shipping: Orders currently take 5-10 business days to process before shipping
In the box: One NEMA 34 stepper motor with integrated windings

About the Heavy Duty NEMA 34 Stepper Motor 14mm Key Shaft

This NEMA 34 stepper motor is made for heavy-load CNC routers, milling machines and automated industrial setups. It delivers 8.7Nm of torque and is rated at 6A coil current.

The motor has a steel housing and a cast iron chassis, with copper windings inside. The 14mm (0.55in) keyed shaft locks couplers in place. The 86mm (3.39in) by 114mm (4.49in) frame fits standard machine bases.

Motor size: NEMA 34
Torque: 8.7Nm
Coil current: 6A
Shaft: 14mm (0.55in), keyed
Frame: 86mm (3.39in) by 114mm (4.49in)
Mount: Rigid mount
Material: Cast iron chassis, steel housing, copper windings
Use: CNC routers, milling machines, automated industrial setups
In the box: 1 x NEMA 34 stepper motor with integrated windings

Questions and answers

What driver do I need for this motor?: It is rated at 6 A per phase, so pair it with a bipolar stepper driver rated above that current, such as a DM860-class or digital driver, and set the current limit to the motor's rating. A small A4988 or DRV8825 board cannot supply this.
Will it fit my existing NEMA 34 mounts?: The 86 x 114 mm frame and standard NEMA 34 hole pattern match most NEMA 34 brackets and machine bases. Check your coupler bore against the 14 mm keyed shaft before ordering.
Is 8.7 Nm enough for a CNC router?: For a mid-size router or mill moving a heavy gantry, 8.7 Nm is substantial and gives margin against skipped steps in deep cuts. Very large or fast machines may still need servo drives.
What comes in the box?: One NEMA 34 stepper motor with integrated windings. No driver, cable, pulley or mounting hardware is included.
How does it compare with a NEMA 23 motor?: It delivers much higher torque and handles heavier loads, but it is larger, heavier and draws far more current. Upgrading means a bigger driver and power supply, not just a motor swap.
Where is the Heavy Duty NEMA 34 Stepper Motor 14mm Key Shaft cheapest?: At VXB.com Bearings, for $371.95, as of our latest check.

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