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Heavy Duty NEMA 34 Stepper Motor 14mm Key Shaft CNC

Heavy Duty NEMA 34 Stepper Motor 14mm Key Shaft CNC

Best price now

$53.09at AmazonChecked 5 min ago

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Price facts

  • Lowest price today: $53.09 at Amazon (checked Nov 13, 2026).

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

This is a single NEMA 34 frame stepper motor built for heavy-load CNC work: 8.7 Nm of holding torque, a 6 A per-phase rating and a 14 mm keyed shaft. The 86 x 114 mm frame and standard hole pattern fit common router and mill mounts, and the steel housing is meant to hold up through long machining cycles. It suits hobbyists and small shops driving heavy gantries, rotary axes or mills that need more grip than a NEMA 23 can give. Against smaller steppers it trades speed headroom for torque, and it needs a driver and power supply rated for its current.

Best forCNC routers and mills with heavy gantriesRotary and 4th-axis builds needing high holding torqueRetrofits replacing NEMA 23 motors on large framesShops running long, continuous machining cycles
Pros
  • 8.7 Nm holding torque holds position in aggressive cuts
  • 6 A per-phase rating gives fast acceleration under load
  • 14 mm keyed shaft locks couplers against slipping
  • Standard NEMA 34 frame and hole pattern fit common mounts
  • Steel housing is built for continuous duty
Cons
  • Needs a driver and supply rated for 6 A per phase
  • Large and heavy, so it is not a drop-in for small machines
  • High current draw means more heat and a bigger power budget
  • No cable or connector included

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

  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $53.09Free shippingChecked 5 min ago
    Visit Amazon

Also available at

  • eBayCheck price at eBay
  • osmtec.comCheck price at osmtec.com
  • oyostepperCheck price at oyostepper
  • VXB.com BearingsCheck price at VXB.com Bearings

Store links may earn us a commission.

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

$371.95$48.41
Nov 3Nov 13

Lowest price we've seen: $48.41 on Nov 13 at oyostepper; highest $371.95 on Nov 3. Tracked across 4 stores since Nov 3.

From VXB.com Bearings

  • 8.7Nm torque, 6A coil current, 14mm (0.55in) keyed shaft, rigid mount
  • 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
  • 14mm (0.55in) solid keyway diameter locks couplers secure
  • Robust steel housing handles continuous machining cycles without overheating or losing step accuracy
Fit
86mm (3.39in) by 114mm (4.49in) frame fits standard machine bases; universal hole patterns accept most table mounts and bracket kits
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 complete rotation unit with integrated windings

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

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

The motor has a steel housing and a rigid mount. The 14 mm (0.55 in) keyed shaft locks couplers in place. The frame measures 86 mm (3.39 in) by 114 mm (4.49 in) and fits standard machine bases. The hole patterns accept most table mounts and bracket kits.

Type
NEMA 34 stepper motor
Torque
8.7 Nm
Coil current
6 A
Shaft
14 mm (0.55 in), keyed
Frame
86 mm (3.39 in) by 114 mm (4.49 in)
Housing
Steel
Mounting
Rigid mount; hole patterns fit most table mounts and bracket kits
In the box
1 motor with integrated windings

Questions and answers

What driver does this motor need?
It is rated at 6 A per phase, so pair it with a bipolar stepper driver that can supply at least that current, such as a DM860-class unit, plus a power supply sized for the load.
Will it fit my existing NEMA 34 mount?
The 86 x 114 mm frame and standard NEMA 34 hole pattern match most brackets and machine bases. Check your mount's bolt spacing and shaft coupling bore before ordering.
Is 8.7 Nm enough for a heavy CNC router?
It is strong for a NEMA 34 and suits heavy gantries, mills and rotary axes. Very large or fast-moving gantries may still need servo motors or gear reduction.
What is in the box?
One motor with integrated windings. Cables, connectors and drivers are not included.
Does the keyed shaft prevent coupler slip?
The 14 mm shaft has a keyway, so a matching keyed coupler grips far better than a plain round shaft under sudden load.
Where is the Heavy Duty NEMA 34 Stepper Motor 14mm Key Shaft CNC cheapest?
At Amazon, for $53.09, as of our latest check.
Where can I buy the Heavy Duty NEMA 34 Stepper Motor 14mm Key Shaft CNC?
5 stores we checked sell it, including Amazon, eBay, osmtec.com, oyostepper, VXB.com Bearings.

Stores we've priced the Heavy Duty NEMA 34 Stepper Motor 14mm Key Shaft CNC at

  • VXB.com Bearings deals and prices

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