FAQ: HAMMER CASTER 520SRRB150 Fixed Rubber Wheel (150 mm, Load Capacity 306 kg):

1. What is the HAMMER CASTER 520SRRB150?

The 520SRRB150 is a fixed‐plate caster featuring a 150 mm diameter synthetic rubber wheel on a steel hub, designed by Hammer Caster for heavy‐duty use. It supports up to 306 kg per wheel and is manufactured in Japan with a bright chromate plating finish on the bracket.

2. What are its key specifications?

Wheel diameter: 150 mm

Mounting height: 196 mm (from floor to top of plate)

Mounting plate dimensions: 150 × 105 mm (length × width)

Mounting hole pitch: 112–119 mm (longitudinal) × 63–56 mm (transverse)

Hole diameter: 13 mm

Mass per caster: 2.5 kg

3. How does a fixed caster differ from a swivel caster?

A fixed caster locks the wheel orientation so it rolls only straight ahead. Swivel casters have a 360° pivot joint, allowing easy directional changes without repositioning the cart or equipment.

4. What are the advantages and disadvantages of rubber wheels versus polyurethane or nylon?

Advantages:

• Excellent shock absorption and quieter operation on uneven floors

• Good traction, reducing slipping on smooth surfaces

Disadvantages:

• Lower load capacity for the same size compared to PU or nylon

• Faster wear if used extensively on abrasive or rough surfaces

5. Which floor surfaces are most suitable?

Concrete, cement, industrial vinyl, hardwood, and low‐profile tile floors. Avoid extremely slick surfaces or ones cluttered with sharp debris that can cut the rubber.

6. What temperature range can it handle?

Typical synthetic rubber remains functional between –10 °C and +60 °C. Below –10 °C it becomes stiff; above +60 °C it may soften and lose load‐bearing performance.

7. How do I install the 520SRRB150?

Position the caster’s mounting plate on the equipment base.

Mark the four hole centers through the plate.

Drill 13 mm holes at marked positions.

Insert grade-8.8 bolts or equivalent and tighten nuts evenly.

Confirm plate is flush and securely fastened.

8. How should I maintain and clean it?

Periodically check and retighten bolts.

Clean wheel treads with water and mild detergent; avoid solvents.

Lubricate bearings if you hear squeaks or observe stiffness.

9. What is the expected lifespan?

Under moderate use on smooth floors and proper maintenance, expect 1–3 years. Replace the wheel when the tread groove wears down or bearings develop play.

10. Can the wheel and mounting plate be replaced separately?

Yes. The wheel unit is bolted to the bracket and can be swapped out independently. Order replacement wheel code “RB150” for direct compatibility.

11. How do I determine the number of casters needed?

Divide your total load by the per-wheel capacity, then apply a safety factor of 1.25. For example:

Total load = 1 200 kg

Required capacity per wheel = (1 200 kg ÷ 4) × 1.25 = 375 kg You would need casters rated at least 375 kg each.

12. Does it comply with any quality or safety standards?

Hammer Caster adheres to Japan Industrial Standards (JIS) for caster construction and often meets RoHS requirements for hazardous-substance reduction.

13. Where can I purchase and what is the warranty?

Available through QTE Technologies (qtetech.com/en). QTE Technologies is a proud global MRO provider, serving customers in over 180 countries and always striving to ensure a complete and satisfying customer experience. Established in 2010, we supply over 1 million products for every industry and technology. Additionally, you can reach us anytime via 24×7 chat support, phone, WhatsApp or email. Discover what our valued customers have to say about our services on our dedicated review page.

14. What is the approximate price range?

Please contact QTE Technologies (qtetech.com/en)

15. Are there models with brakes or locks?

Brakes are generally offered only on swivel versions. For fixed setups, an external foot‐activated wheel clamp can be installed.

16. How can I verify genuine Hammer Caster products?

Look for clear Hammer Caster logos and cleanly printed model numbers on the bracket.

Ensure plating is uniform, with no flaking or discoloration.

Purchase from QTE Technologies (qtetech.com/en).

17. Is customization available?

Hammer Caster can accommodate special orders for:

Alternate mounting-plate hole patterns

Custom bracket paints or plating

Sealed bearings for harsh environments

18. When should I choose polyurethane over rubber?

Select polyurethane or nylon if you need:

Higher individual wheel loads (> 500 kg)

Superior resistance to cuts, chemicals, or oils

Minimal rolling resistance on smooth surfaces

19. Any special considerations for inclined planes?

On slopes steeper than 5°, install additional wheel chocks or braking mechanisms to prevent uncontrolled rolling of heavy loads.

20. How do I get technical support?

Contact QTE Technologies (qtetech.com/en) for application guidance, troubleshooting, and ordering assistance.