Name: Multi-Ribbed Belt
Brand: SQUAREROPE
SKU: product-poly-v-belt
Availability: InStock

Question 1

What is the difference between PJ and PK belts?

Accepted Answer

The difference is the rib pitch (distance between peaks). PJ belts have a smaller pitch (~2.34mm) and are used for appliances and small tools. PK belts have a larger pitch (~3.56mm) and are the automotive standard for serpentine drives and heavy accessories. They are not interchangeable.

Question 2

Are Micro-V belts better than V-belts?

Accepted Answer

Yes. The flat, thin profile combined with multiple ribs provides huge surface area contact in a compact package. This allows for higher transmission ratios (up to 1:60), higher speed capability, and greater energy efficiency compared to a bulky traditional V-belt drive.

Question 3

Can this belt drive multiple accessories?

Accepted Answer

Absolutely. The "Serpentine" capability is a key feature. Because the belt is so thin and flexible, it can wrap around backside idlers and drive multiple accessories (Alternator, AC, Power Steering) simultaneously, simplifying engine design.

Question 4

Why does my belt squeal?

Accepted Answer

Squealing is usually a sign of low tension or fluid contamination (oil/water). However, SQUAREROPE PK belts feature a engineered "Soft Back" rubber that dampens vibration and noise, even if the alignment isn't 100% perfect.

Question 5

How often should I replace my Micro-V belt?

Accepted Answer

While visual inspection for cracks is standard, our EPDM-based Micro-V belts are extremely resistant to cracking. We recommend adhering to your equipment manufacturer's schedule, but generally, our belts are designed to outlast standard neoprene belts by 50-60%, making them a "install and forget" solution for premium applications.

Cross Section	Rib Pitch b_o(mm)	Belt Thickness h(mm)	Length Range L_d(mm)	Min Pulley Dia d_dmin(mm)	Quote
PJ	2.34	4	508-2540	20	PJ- mm
PK	3.56	5	508-2540	45	PK- mm