You’re in the market for a mobile crusher. You’ve been comparing prices, checking capacities, reading reviews, and talking to manufacturers.But here’s a question most buyers never ask:“What motor is inside this crusher?”It’s the question that separates smart buyers from expensive regrets.Here’s why: The motor is the heart of your crusher. It determines 60% of your operating cost, 80% of your maintenance headaches, and whether your crusher runs for 5 years or 15 years.Two crushers can look identical on the outside — same size, same color, same capacity rating — but inside, one might have a premium IE3 motor and the other might have a cheap IE2 motor that will cost you thousands more per year.This guide will teach you exactly what to look for when evaluating a crusher’s motor, how to spot manufacturers who cut corners, and why the motor you choose matters more than the price on the invoice.
Part 1: Crusher Motor Basics — What Every Buyer Should KnowWhat Does the Motor Actually Do in a Crusher?
The motor converts electrical energy into mechanical power that drives the crushing chamber. In a jaw crusher, it powers the eccentric shaft that opens and closes the jaw. In a cone crusher, it spins the mantle. In an impact crusher, it rotates the rotor at high speed.
The motor is not just a component — it’s the single most critical component.
If the motor fails, the entire crusher stops. No amount of premium jaw plates or hydraulic systems can compensate for a poor motor.Understanding Motor Efficiency ClassesMotors are classified by their energy efficiency. The IEC (International Electrotechnical Commission) standard defines four efficiency classes:
Understanding Motor Efficiency ClassesMotors are classified by their energy efficiency.
The IEC (International Electrotechnical Commission) standard defines four efficiency classes:
| Efficiency Class | Name | China Equivalent | Typical Efficiency | Status |
| IE1 | Standard | Y/Y2 series | 83-87% | ❌ Obsolete (banned) |
| IE2 | High Efficiency | YE2 series | 87-92% | ⚠ Minimum (being phased out) |
| IE3 | Premium Efficiency | YE3 series | 90-95% | ✅ Current standard |
| IE4 | Super Premium | YE4 series | 93-97% | 🌟 Best available |
Here’s what this means in plain English:
- An IE2 (YE2) motor wastes 8-13% of the electricity you pay for as heat
- An IE3 (YE3) motor wastes only 5-10%
- That 3-5% difference translates to $800-2,000 per year on a typical crusher
Why Most Manufacturers Still Use YE2 Motors
If YE3 is clearly better, why do so many crushers still come with YE2?
Simple answer: Cost.
A YE3 motor costs 15-25% more to manufacture than a YE2 motor. For a 75kW motor, that’s roughly $300-600 extra per unit.For a manufacturer selling 100 crushers per year, switching from YE2 to YE3 means:
- Extra cost: $30,000-60,000 per year
- Higher sticker price on their equipment
- Potential loss of price-sensitive customers
So many manufacturers choose the cheaper YE2 motor to keep their prices competitive. The customer pays less upfront — but pays much more over the life of the machine.SUHMAN’s choice: We use YE3 motors as standard on all crushers. No extra charge. We’d rather give you a better machine than a cheaper invoice.
Part 2: The 6 Motor Specifications You Must Check Before Buying
When you’re evaluating a mobile crusher, here are the 6 motor specifications you need to verify. Ask your supplier for each one — and if they can’t provide it, that’s a red flag.
✅ 1. Efficiency Class (IE Rating)
What to look for: IE3 (YE3) or higherMinimum requirement: IE2 (YE2) — but only if the price reflects the lower efficiencyRecommended: IE3 (YE3) — the current global standardBest: IE4 (YE4) — if available and within budgetHow to verify:
- Check the motor nameplate for “IE3” or “YE3” marking
- Ask for the efficiency test report from an accredited laboratory
- Cross-reference the motor model number with the manufacturer’s catalog
⚠ Red flag: If the supplier says “high efficiency” without specifying IE2 or IE3, they’re likely using IE2.
✅ 2. Motor Brand
What to look for: Reputable, certified motor manufacturerTier 1 (International premium):
- Siemens (Germany)
- ABB (Switzerland/Sweden)
- WEG (Brazil)
Tier 2 (Chinese premium):
- Westing
- Wolong
- SIASUN
- Zhitong
Tier 3 (Generic/unknown):
- No brand name on nameplate
- “OEM” or unbranded motors
- Motors from unknown workshops
Why brand matters:
- Quality control: Premium brands have stricter QC processes
- Consistency: Every motor meets the same specifications
- Parts availability: Bearings, seals, and components are easy to source worldwide
- Warranty support: Reputable brands honor their warranties
✅ 3. Protection Rating (IP Code)
What to look for: IP54 or IP55
IP code breakdown:
- First digit = protection against solid objects (dust)
- Second digit = protection against liquids (water)
| IP Rating | Dust Protection | Water Protection | Suitable for Crushers? |
| IP23 | Fingers only | Spraying water | ❌ No — too low |
| IP44 | Tools/wires | Splashing water | ⚠ Marginal |
| IP54 | Dust-protected | Splashing water | ✅ Minimum |
| IP55 | Dust-protected | Low-pressure jets | ✅ Recommended |
| IP65 | Dust-tight | Low-pressure jets | ✅ Excellent |
Why it matters for crushers:
- Crushers operate in dusty environments (stone dust, sand, cement dust)
- Outdoor operation means exposure to rain and humidity
- Dust ingress into the motor causes overheating and winding failure
- Water ingress causes short circuits and motor burnout
⚠ Red flag: IP23 or IP44 motors are unsuitable for crusher applications.
✅ 4. Insulation Class
What to look for: Class F (minimum) or Class HInsulation class defines the maximum operating temperature:
| Class | Max Temperature | Typical Use | Suitable for Crushers? |
| Class B | 130°C | Light-duty | ❌ No |
| Class F | 155°C | Industrial standard | ✅ Yes |
| Class H | 180°C | Heavy-duty/extrem | ✅ Best |
Why it matters:
- Crushers generate significant heat during operation
- Higher insulation class = better heat resistance = longer motor life
- Class F insulation with Class B temperature rise (common in YE3 motors) provides a safety margin that extends motor life
How to verify: Check the motor nameplate for “Ins. Class: F” or “Ins. Class: H”
✅ 5. Temperature Rise Rating
What to look for: Class B rise (80K) with Class F insulationThis is a technical but critical specification:
- Temperature rise = how much the motor’s internal temperature increases during operation
- Class B rise (80K) = temperature increases by 80°C above ambient
- Class F insulation (155°C) = insulation can withstand up to 155°C
The ideal combination: Class B temperature rise + Class F insulation = 155°C – 80°C = 75°C safety marginThis means the motor can run for thousands of hours without the insulation degrading, significantly extending motor life.⚠ Red flag: If the supplier can’t tell you the temperature rise rating, they probably don’t know — which means it wasn’t designed with this in mind.
✅ 6. Certifications
What to look for: CE (Europe), CCC (China), ISO 9001
| Certification | Region | What It Means |
| CE | Europe/Middle East/Africa | Meets EU safety and efficiency standards |
| CCC | China | Meets Chinese quality and safety standards |
| ISO 9001 | Global | Manufacturer has a certified quality management system |
| UL | North America | Meets US safety standards |
Why certifications matter:
- CE certification means the motor has been tested by a third-party lab
- It guarantees the motor meets the efficiency class claimed on the nameplate
- It’s often required for customs clearance when importing equipment
How to verify:
- Look for the CE mark on the motor nameplate
- Ask the supplier for a copy of the certification document
- Verify the certificate number on the issuing body’s website
Part 3: YE3 vs YE2 — The Full Comparison
You’ve seen the individual specs. Now let’s put YE2 and YE3 side by side so you can see the real-world difference.
Technical Comparison
| Specification | YE2 (IE2) | YE3 (IE3) | Advantage |
| Efficiency | 87-92% | 90-95% | YE3: 3-5% highe |
| Operating Temperature | Higher (+10-15°C) | Lower | YE3: Less heat stress |
| Vibration Level | 1.8 mm/s | 1.3 mm/s | YE3: 28% less vibration |
| Noise Level | 70-75 dB | 65-70 dB | YE3: 5 dB quiete |
| Overload Capacity | 1.8-2.0x | 2.0-2.2x | YE3: Handles hard rock better |
| Expected Lifespan | 10-15 years | 15-20 years | YE3: 5+ years longer |
| Starting Current | Higher | Lower | YE3: Less grid impact |
10-Year Total Cost Comparison (75kW Crusher)
| Cost Category | YE2 Motor | YE3 Motor | Difference |
| Initial motor cost | $2,200 | $2,700 | +$500 |
| Electricity (10 years) | $247,200 | $239,400 | -$7,800 |
| Bearing replacement | $6,000 | $3,000 | -$3,000 |
| Unplanned downtime | $15,000 | $10,500 | -$4,500 |
| Motor replacement | $5,000 | $0 | -$5,000 |
| Total 10-year cost | $275,400 | $260,600 | -$14,800 |
The YE3 motor costs $500 more upfront but saves $14,800 over 10 years.That’s a 2,860% return on investment.
Global Compliance Comparison
| Region | Minimum Required | YE2 Compliant? | YE3 Compliant? |
| China | IE3 (GB 18613-2020) | ❌ No | ✅ Yes |
| European Union | IE3 (EU 2019/1781) | ❌ No | ✅ Yes |
| United States | IE3 (NEMA Premium) | ❌ No | ✅ Yes |
| India | IE3 (BIS) | ❌ No | ✅ Yes |
| Australia | IE3 (MEPS) | ❌ No | ✅ Yes |
| Southeast Asia | IE2-IE3 (varies) | ⚠ Marginal | ✅ Yes |
| Middle East | IE2-IE3 (varies) | ⚠ Marginal | ✅ Yes |
| Africa | IE2 (most countries) | ✅ Yes | ✅ Yes |
Bottom line: If you plan to export your crusher or operate in multiple regions, YE3 is the only motor that meets all major markets’ requirements today and in the near future.
Part 4: How to Spot Manufacturers Who Cut Corners on Motors
Not all crusher manufacturers are honest about their motors. Here’s how to identify the ones who are hiding something.
🔴 Red Flags — Walk Away If You See These
1. No motor specifications in the brochure/website
- If they won’t tell you the motor type, it’s probably not good
- Reputable manufacturers proudly list their motor specs
2. “High-efficiency motor” without specifying IE class
- This is vague marketing language
- They’re likely using IE2 (YE2) and hoping you won’t ask
3. Price is significantly lower than competitors
- A $10,000 cheaper crusher might have a $3,000 motor (vs. $5,000 for YE3)
- You’re paying for it in electricity and maintenance
4. Motor nameplate is covered, removed, or unreadable
- Some manufacturers hide the nameplate or use generic labels
- This prevents you from verifying the motor type
5. No CE/CCC certification for the motor
- Without certification, the efficiency claim is unverified
- The motor may not meet the stated specifications
6. “Custom motor” or “OEM motor” with no brand name
- Generic motors from unknown workshops lack quality control
- Parts and service support will be difficult to find
🟢 Green Flags — These Manufacturers Are Trustworthy1. Motor specifications clearly listed
1. Motor specifications clearly listed
- IE class, brand, power rating, protection class all visible
- Example: “YE3-250M-4, IE3, 75kW, IP55, Class F insulation”
2. Motor brand named
- Whether it’s Siemens, ABB, or a reputable Chinese brand, they tell you
3. Certification documents available
- CE certificate, efficiency test report, ISO 9001 certification
4. Willing to show you the motor in person
- Invite you to visit the factory and see the motor on the actual machine
- Provide photos of the motor nameplate
5. Motor warranty matches crusher warranty
- If the crusher has a 2-year warranty, the motor should too
- Some manufacturers give the crusher 2 years but the motor only 1 year
The 5 Questions You Must Ask Before Buying
Write these down and ask every manufacturer you talk to:
- “What motor model and efficiency class does this crusher use?”
- Good answer: “YE3-250M-4, IE3 premium efficiency”
- Bad answer: “High-efficiency motor” (too vague)
- “What brand is the motor?”
- Good answer: “Westing YE3 series” or “Siemens 1LE1”
- Bad answer: “Our own motor” or “OEM”
- “What is the motor’s protection rating?”
- Good answer: “IP55”
- Bad answer: “IP23” or “I’m not sure”
- “Can you provide the motor’s CE certificate and efficiency test report?”
- Good answer: “Yes, here are the documents”
- Bad answer: “We don’t have those” or “The motor doesn’t need certification”
- “What is the motor warranty period?”
- Good answer: “2 years, same as the crusher”
- Bad answer: “1 year” or “6 months”
Part 5: Get a Crusher with the Right Motor — Request Your Free Quote
Now that you know what to look for, you’re ready to find the right crusher. Here’s how to make sure you get a machine that won’t cost you thousands in hidden expenses:
What to Include in Your Inquiry
When you contact a manufacturer for a quote, include these details:
✅ Crusher type needed (jaw / cone / impact / screening)
✅ Material type (granite / limestone / construction waste / etc.)
✅ Required capacity (tph)
✅ Feed size (mm)
✅ Output size requirements (mm)
✅ Project location
✅ Power supply available (voltage/frequency)
✅ Any special requirements (cold climate, high altitude, etc.)
What to Expect from a Reputable Manufacturer
A trustworthy crusher supplier should provide:
| Item | What You Should Receive |
| Detailed quotation | Complete specs, including motor efficiency class, brand, and certifications |
| Technical proposal | Customized solution based on your material and capacity needs |
| Motor documentation | Efficiency test report, CE/CCC certificates |
| Warranty terms | Clear warranty coverage for all components, including the motor |
| Delivery timeline | Realistic production and shipping schedule |
| After-sales support | Installation guidance, spare parts availability, technical support |
Why Request Multiple Quotes?
Don’t settle for the first quote you receive. Get quotes from at least 3 manufacturers so you can:
- Compare motor specifications — not just price
- Evaluate response quality — how detailed and professional is their proposal?
- Check warranty terms — does the motor warranty match the crusher warranty?
- Verify certifications — can they provide the documents they claim?
Part 6: Your Crusher Motor Buying Checklist
Print this checklist and use it when evaluating crushers from any manufacturer:
Before You Contact Manufacturers
- [ ] Determine your required crusher capacity (tph)
- [ ] Identify your material type (hard rock, soft rock, construction waste)
- [ ] Calculate your annual operating hours
- [ ] Research your local electricity rate ($/kWh)
When Evaluating Crushers
- [ ] Motor efficiency class is IE3 (YE3) or higher
- [ ] Motor brand is clearly stated
- [ ] Protection rating is IP54 or IP55
- [ ] Insulation class is Class F or Class H
- [ ] CE/CCC certification is available
- [ ] Motor warranty is at least 1 year (2 years preferred)
- [ ] Motor specifications are in the written quote/contract
Before You Sign
- [ ] Motor specifications are written in the purchase contract
- [ ] Motor brand and model are specified (not just “high efficiency”)
- [ ] You’ve received the motor’s efficiency test report
- [ ] You’ve verified the CE/CCC certificate
- [ ] You’ve compared the total cost of ownership (not just purchase price)
Bottom Line
When buying a mobile crusher, the motor is not a detail — it’s the decision.A $500 motor upgrade (YE2 to YE3) saves you $14,800 over 10 years. That’s not a cost — it’s an investment with a 2,860% return.The smart buyer doesn’t ask “How much is this crusher?”The smart buyer asks “What motor is in this crusher?”
Ready to Get a Crusher Quote with Full Motor Specifications?
Get your free, no-obligation crusher quote within 24 hours.We’ll provide:
- ✅ Complete motor specifications (efficiency class, brand, certifications)
- ✅ Customized solution based on your material and capacity
- ✅ Transparent pricing with no hidden costs
- ✅ 2-year warranty on all components, including the motor
📞WhatsApp: +86 13856971828
📧Email: ahsuhman@163.com
🌐Website:ahsuhman.com/contact
Tell us about your project — we’ll recommend the right crusher with the right motor.
