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RATTMMOTOR 2.2 kW Air-Cooled CNC Spindle Motor and VFD, 220 V, ER201 / 7
Product guide

RATTMMOTOR 2.2 kW Air-Cooled CNC Spindle Motor and VFD, 220 V, ER20

RATTMMOTOR’s 2.2 kW air-cooled spindle motor listing pairs an ER20 spindle with a variable-frequency drive for CNC routing and engraving setups. The listing claims a top speed of 24000 rpm and says the spindle must stay above 9000 rpm, so it is not presented as suitable for very low-speed operation.

At a glance

  • Air cooling uses a fan, avoiding the need for a water pump and water lines, according to the listing.
  • The supplied drive is described as converting single-phase input to three-phase output for the spindle.
  • The listing describes digital, analog, PID and RS485 frequency-setting options for the VFD.
  • The spindle speed is stated to need to remain above 9000 rpm. The advertised 24000 rpm is not a low-speed range.
Price
$184.00Save 20%

Reference price: $230.00

Price checked: Nov 14, 2026

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Pros and cons

Pros

  • Air cooling avoids a separate water-cooling loop and its pump and plumbing.
  • ER20 collet format and the stated 24000 rpm top speed are aimed at CNC routing and engraving applications.
  • The listed VFD supports single-phase input and three-phase output, plus several frequency-setting methods.

Cons

  • The stated minimum speed above 9000 rpm limits suitability for operations that need slower spindle speeds.

Technical specifications

20 specifications
Identity
BrandRATTMMOTOR
Part numberRTM2.2-220
Motor
Rated power2.2KW
Horsepower3 hp
Voltage220 volts
Maximum speed24000 rpm
Frequency400HZ
CoolingAir cooled
Collet typeER20
Runout claimless than 0.01mm
Minimum stated spindle speedabove 9000 rpm
Body materialstainless steel
VFD
Input voltage220V(+/-15%)
Output voltage220VAC
Input frequency50-60Hz
Output frequency0-1000Hz
Input phase1 phase
Output phase3 phase
Current11A
Dimensions and installation
Weight listed6 kg

What to know before buying

Listing details to confirm

Listing details conflict or are unconfirmed: the title and motor claims specify 220 V, while a VFD specification panel instead states 110V(+/-15%) input and 1100VAC output. Confirm the selected unit's drive voltage and motor compatibility before installation. The claimed runout is not an independently verified measurement. The listing also says no wiring is required for motor plug terminal 4, while separately identifying PE as an earthing terminal that must be earthed. Follow the correct wiring instructions for the actual unit.

Who is it for?

A good fit for

  • CNC router owners seeking an air-cooled ER20 spindle and variable-frequency drive combination.
  • Engraving or machining setups intended to run above the stated 9000 rpm minimum.

Less suited to

  • Buyers whose work requires spindle speeds below 9000 rpm.
  • Installations that cannot confirm compatible 220 V spindle and VFD specifications from the selected listing.
RATTMMOTOR 2.2 kW Air-Cooled CNC Spindle Motor and VFD, 220 V, ER20 · photo 2
Additional product photo 2

Customer reviews on Amazon

3.5 / 5 · 4 ratings
  • 5 stars46%46%
  • 4 stars22%22%
  • 3 stars0%0%
  • 2 stars0%0%
  • 1 star32%32%

The supplied evidence contains aggregate ratings but no customer comments. The overall rating distribution is mixed, with both five-star and one-star categories represented. With only a small rating sample and no explanations, it cannot establish what buyers liked or disliked. Treat it as limited feedback rather than evidence of performance, particularly given the unresolved VFD voltage discrepancy.

Frequently asked questions

Does this listing include a VFD?

The product title identifies a VFD drive and the listing provides VFD specifications, but no explicit box inventory is supplied. Confirm the package contents for the selected listing.

What is the stated speed range?

The listing gives a speed of 24000 rpm and says the spindle must stay above 9000 rpm to avoid damage. It does not support treating the unit as suitable for low-speed work.

Is the VFD specification clearly confirmed for 220 V?

No. One specification section gives 220 V input and output, while another says 110V(+/-15%) input and 1100VAC output. Confirm the exact drive version and its compatibility before purchase or wiring.

Does air cooling require a water pump?

The listing describes fan cooling and says a water pump and water lines are not needed.

RATTMMOTOR 2.2 kW Air-Cooled CNC Spindle Motor and VFD, 220 V, ER20 · photo 3
Additional product photo 3

Alternative options

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