A Class 4 forklift is a type of internal combustion (IC) forklift equipped with cushion tires, designed primarily for indoor use on smooth surfaces.
According to the classification system defined by the Occupational Safety and Health Administration (OSHA), Class 4 forklifts are known for their strong lifting power, compact design, and ability to operate efficiently in confined indoor environments.
what is a class 4 forklift
What Defines a Class 4 Forklift?
Class 4 forklifts are powered by internal combustion engines, typically using fuel such as gasoline, LPG (liquefied petroleum gas), or compressed natural gas.
Key features:
- Internal combustion engine (IC)
- Cushion tires (solid rubber tires)
- Designed for smooth indoor floors
- Tight turning radius for maneuverability
👉 These forklifts are ideal for industrial settings where durability and power are required indoors.
What Are Cushion Tires?
Cushion tires are solid rubber tires that are pressed directly onto the wheel.
Characteristics of cushion tires:
- Best for flat, smooth surfaces
- Provide a smaller turning radius
- Lower ground clearance
- Not suitable for rough terrain
👉 This is the key difference between Class 4 and Class 5 forklifts.
What Is a Class 4 Forklift Used For?
Class 4 forklifts are commonly used in indoor industrial environments that require strong lifting performance.
Typical applications:
- Manufacturing plants
- Warehouses with smooth concrete floors
- Loading docks
- Indoor logistics operations
👉 They are especially effective in high-volume, heavy-duty indoor tasks.
Advantages of Class 4 Forklifts
✔ Strong Lifting Power
Internal combustion engines provide high performance for heavy loads.
✔ Compact Design
Smaller turning radius allows operation in tighter spaces.
✔ Cost-Effective for Heavy Duty Use
Lower upfront cost compared to some electric models.
✔ Durable and Reliable
Well-suited for continuous industrial use.
Disadvantages to Consider
❌ Not Suitable for Rough Terrain
Cushion tires perform poorly on uneven or outdoor surfaces.
❌ Indoor Emissions
IC engines produce exhaust, which may require proper ventilation.
❌ Limited Outdoor Use
Best restricted to indoor environments.
❌ Higher Noise Levels
Compared to electric forklifts.
Class 4 vs Class 5 Forklifts
| Feature | Class 4 Forklift | Class 5 Forklift |
|---|---|---|
| Tire type | Cushion tires | Pneumatic tires |
| Environment | Indoor | Indoor & outdoor |
| Terrain | Smooth surfaces | Rough surfaces |
| Stability | High on flat floors | Better on uneven ground |
👉 If you work indoors on smooth floors → Class 4 is ideal
👉 If you need outdoor flexibility → Class 5 is better
Class 4 vs Class 1 Forklifts
| Feature | Class 4 Forklift | Class 1 Forklift |
|---|---|---|
| Power source | Internal combustion | Electric |
| Emissions | Yes | None |
| Noise level | Higher | Lower |
| Use case | Heavy-duty indoor | Clean indoor environments |
👉 Choose Class 4 for power, and Class 1 for clean, quiet operations.
How to Choose a Class 4 Forklift
A Class 4 forklift is the right choice if:
✔ You operate indoors on smooth surfaces
✔ You need strong lifting performance
✔ You handle heavy loads regularly
✔ You want a durable industrial solution
You may need another class if:
❌ You operate outdoors frequently
❌ You require zero emissions (consider electric forklifts)
❌ You work on uneven terrain
Frequently Asked Questions
What is a Class 4 forklift used for?
It is used for heavy-duty indoor material handling on smooth surfaces.
What are cushion tires on a forklift?
They are solid rubber tires designed for indoor use on flat floors.
Can Class 4 forklifts be used outdoors?
They can be used outdoors on smooth surfaces, but they are not ideal for rough terrain.
What is the difference between Class 4 and Class 5 forklifts?
Class 4 forklifts use cushion tires, while Class 5 forklifts use pneumatic tires for outdoor use.
Final Thoughts
A Class 4 forklift is a powerful and efficient solution for indoor industrial operations that require strength, durability, and maneuverability.
While it may not be suitable for outdoor environments, it remains a top choice for heavy-duty indoor material handling.
Looking for Reliable Class 4 Forklift Solutions?
Choosing the right forklift can significantly improve your operational efficiency and productivity.
At Hebei Maoxiang Technology Co., Ltd., we offer durable and cost-effective internal combustion forklifts designed for industrial performance.
Why Choose Us?
- Strong and reliable forklift designs
- Competitive pricing for global markets
- Custom solutions for indoor and industrial applications
- Professional support and fast response
👉 Contact us today to find the right Class 4 forklift for your business.
