PROFESSION MICRO BEARING MFG

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About PMB dental bearings(From PMB MiCRO miniature bearings)

PMB MiCRO Bearing is a specialized manufacturer of dental bearing,chinese dental handpiece bearing .We dedicated to providing high quality dental ball bearings for handpiece repair shops distributors and manufacturers with very competitive price. PMB Miniature Bearing can provide a wide range of dental hand piece bearings in which you can find detailed information of high-speed dental bearing.

PMB Dental bearings provide dental manufacturers and dentists with a new standard in handpice performance---Higher Speeds,Smoother Operation,Longer life and reduced maintenance.

Products Specification:

PMB High-speed Dental Bearing

Deep Groove Ball Bearings, Radial Bearings (This is standard Type)

High-speed Dental Bearing, of high precision level P4 (ABEC 7), (=JIS4), used for high speed dental handpiece

to be specially usable for various brands of high-speed dental turbine handpieces.

Precision Grade: ABEC 5, ABEC 5P, used for low speed dental handpiece

Material of Bearing Part:

Bearing Part	Material	Characteristics
Outer ring	Refined Stainless Steel 9Cr18Mo (AISI440C)	Antirust, Corrosion resistant, Hardness of Freezing Treatment
Inner ring	Refined Stainless Steel 9Cr18Mo (AISI440C)	Antirust, Corrosion resistant, Hardness of Freezing Treatment
Shield	Refined Stainless Steel	Corrosion resistant, Antirust
Ball	Refined Stainless Steel 9Cr18Mo	Antirust, Corrosion resistant
Ball	Super-hard Ceramic Si3N4	Abrasion resistant, Corrosion resistant

PMB High-Speed precision dental bearings are available with a choice of two different ball cage materials to meet the complete range of high-speed operating environments. And, while these bearings are competitively priced, they deliver better, long-term performance than other precision bearings.

Retainers
(Cages)

Retainer also known as bearing cages.
PMB dental bearings use Phenolic or Polyimide.

The pictures of retainers are only for radial dental bearings.

	Torlon Retainers (Polyamide) Torlon PAI (Bearing Grade) offers a very low expansion rate, low coefficient of friction and exhibits little or no slip-stick in use. This grade excels in severe service wear applications such as non-lubricated bearings, seals, bearing cages (bearing retainers) and in high temperature environments.

	Phenolic Retainers (Textolite) They are used for retainer cages for steel ball bearings especially when exposed to high-humidity environments. The phenolic does well in where lubricant is scarce as it has a wicking effect to retain and attract lubricants when present.

SIZE Interchange:

mm	inch	inch
3.175	1/8"	0.1250
6.350	1/4"	0.2500
3.571	9/64"	0.1406
2.779	7/64"	0.1094
2.380	6/64"	0.0938
1.910		0.0752
mm/inch=25.4

Bearing Number Decription:

D/G	Deep Groove Ball Bearings, Radial Bearings (This is standard Type)
A/C:	Angular Contact Ball Bearings
ABEC-7	Precision Grade: P4, ABEC 7P (=JIS4), used for high speed dental handpiece
Rings	AISI 440C stainless steel for inner ring and outer ring, or named 9Cr18Mo SR144 (S=Stainless Steel—Material of Inner ring and outer rings) r144=Basic bearing model SFR144TLGZW (g=a unique groove in outer ring, f=Feature of outer rings) TL(Torlon/Polyamide) or TI(Textolite/Phenolic)= Material of cage. z=Feature of shields. w=Width.
Shields	SR144 (=without shield) SR144Z (z=with one shield) SFR144TLGZ1W (z1=Shield & Outer ring is combined, also known as integral shield ) Golden Shield is available!
Balls:	Ceramic Si3N4 Balls and Stainless steel 9Cr18Mo.
Ball nos.	8 Balls or 7 Balls for different quality requirement.
Grooved:	means Stepped, with step in outer ring.
K:	K:Outer ring with step
G:	G:Outer ring with unique groove
Width:	w=Width of outer ring and inner ring:2.779, w02=Width of outer ring 2.380,With of inner ring:2.779mm w=Width of outer ring and inner ring:2.380 mm
Smooth:	The outher ring is Plain, straight
P5:	Precision Grade: ABEC 5, ABEC 5P, used for low speed dental handpiece

We have three type dental bearing:

Flanged Dental Bearings

Grooved Dental Bearings

Smooth Dental Bearings