tapered roller bearing - PORAY- Professional Manufacturer for Machinery Parts of Bearing|Roller|Fastener

FAQ for Hebei Poray

Q1: What types of products do you offer?

A1: We mainly manufacture ball bearings and plastic rollers. But by development and trust of other customers, now our products cover three series: Series 1-Bearings: Miniature Bearings(Standard & Non-Standard), Ball Bearings, Roller Bearings, Pillow Block Bearings, Auto Bearings, Linear Bearings…; Series 2-Plastic Roller/Pulley/Wheel:Nylon/POM/PU Plastic Sliding Window Roller, Plastic Sliding Door Roller, Conveyor Roller, Steel Housing Roller Set, Zinc/ Aluminium Housing Roller Set, Plastic Housing Roller Set, Furniture Roller, Pulley Wheel, Heavy Duty Roller, Plastic Parts and etc…; Series 3- Screw/Nut Series: Set Screw, Machine Screw, Self Tapping Screw, Hex Cap Screw, Hex Nut, Cap Nut, Square Nut, Flange Nut, Washer and other customized fastener parts that are widely used to assemble bearings and plastic rollers.

Q2: Do you only provide standard product or OEM/ODM could also be realized?

A2: We not only provide standard ball bearing, plastic roller and related asembly screw/blot, but as well as customized bearing, plastic roller and related asembly screw/blot to help all customers realize their specific application. We have been always doing this for all of our customers for years and have got great honor and faith.

Q3: Do you have stocks?

A3: It depends. For the bearings, plastic rollers and assembly screw that we usually produce, there will be stocks. But for most bulk orders, we need to produce. But please feel assured that we will always keep on time for the delivery time.

If you have more questions, please do not hesitate to contact us.

Regards, Hebei Poray Sales Team!

Pastic Roller Set Assembly

As a dedicated supplier, we produce the comprehensive plastic roller products. The plastic roller with us is assembled with high quality ball bearing/ non-standard bearing/ needle bearing and high quality connecting screws/blots or rivets. We can ensure you that the plastic roller will arrive quite astonishingly.

Our plastic roller series cover Nylon/POM/PU Plastic Sliding Window Roller, Plastic Sliding Door Roller, Conveyor Roller, Steel Housing Roller Set, Zinc/ Aluminium Housing Roller Set, Plastic Housing Roller Set, Furniture Roller, Pulley Wheel, Heavy Duty Roller, Plastic Parts and etc…

They are widely used in sliding doors/windows, glass door/windows, shower room door/window, garage door/window and etc.

Looking forward to your inquiry.

Hebei Poray Sales Team

Bearing Tolerance standard

What are the tolerance classes for bearings?

Tolerance classes for ball bearings are defined by a committee within the ABMA known as the “Annular Bearings Engineers Committee” (ABEC). These tolerances are commonly referred to as ABEC rating, or grade. Tolerance classes for roller bearings are covered by the RBEC classifications contained within the same standard. These classes are defined in ABMA standard 20 – Radial Bearings of Ball, Cylindrical Roller, and Spherical Roller Types and ABMA standards 12.1 and 12.2 – Instrument Ball Bearings. The ABEC (and RBEC) tolerance classifications specify both tolerances of size and form for the individual inner and outer rings. The critical features of the rings include the bore (or inner diameter of the inner ring), the outer diameter of the outer ring, the ring widths, and the raceways of each ring. Tolerances of form include roundness, taper, runout, and parallelism.

ANSI Standard 20	ISO 492	DIN 620
ABEC 1	Class Normal	P0
ABEC 3	Class 6	P6
ABEC 5	Class 5	P5
ABEC 7	Class 4	P4
ABEC 9	Class 2	P2