HZ20 High-tin aluminum porous sintered copper bearing Suppliers, Company

HZ20 High-tin aluminum porous sintered copper bearing

The HZ20 High-Tin Aluminum Porous Sintered Copper Bearing is designed to deliver reliable performance in medium-to-low load engines and mechanical systems. Combining oil corrosion resistance, moderate fatigue strength, and excellent conformability, this bearing eliminates the need for surface electroplating while maintaining strong anti-seizure properties and embeddability. Its porous sintered copper structure, infused with high-tin aluminum alloy (AISn20Cu1), ensures optimal lubrication retention and wear resistance under continuous operation.

Key Features
Material Structure:
High-Tin Aluminum Layer (AISn20Cu1): 0.2–0.5mm thick, providing low friction, embeddability, and corrosion resistance.
Porous Sintered Copper Base: Enhances oil distribution, heat dissipation, and load capacity up to 50MPa.
Low-Carbon Steel Backing: Delivers mechanical strength, thermal conductivity, and structural stability.
Design Advantages:
Precisely machined outer diameter for accurate fit; inner bore can be reworked post-installation for customized applications.
Eliminates the need for additional anti-friction coatings, reducing production complexity.
Compliant with EU End-of-Life Vehicle Directive 2000/53/EC for environmental sustainability.

Application Feature

HZ20 boundary lubrication bushing is based on a composite material with 3 firmly bonded layers: steel as backing, intered bronze spherical powder as interlayer and modified POM as lining layer. lt has oil pocket for oil lubrication. lt fits well for slow speed. Heavy duty under normal temperature. lt can save cost and prolong working life when replacng normal bronze bushings. lt can lower frquency of adding oil. simplify replacement process when it is used on rolling mill. It is widely applied in chassis of automobile, forging machine, metallurgical machine and mining machine, construction machinery, hydropower, rolling mill etc.

Wear law

HZ20 material follows special wearing rule as shown in Fig.4, infinitesimal abrasion can occur in R phase when being applied with grease and then being installed. But after the R phase. the boundary lubrication condition will disappear and wearing will be exaggerated. If you do refill with oil. the product can be drastically held by non-remarkable wearing and its life will also be greatly extended. Therefore the advantage of HZ20 material is that oil shall be added with an
interval of R, which is remarkably longer that that of R other metal materials. It is approximately five times as long.

When HZ20 bush is installed with application of grease such as lithium-based or silicone grease. Its service life varies from the PV value under working condition. for instance. when PV value is about 2.5MPam/s. its service life will be about 200hr; when PV value is 0.1Mpa-m/s, its service life can be above I0,0oohr (see the table for details) The cycle R of lubrication maintenance of HZ20 bush is about the half of its service life. For instance, when PV=25Mpam/s. it is required to be oil-lubricated every 100hr.

Material Structure

1. POMwith lead 0.3-0.5mm、
2. Porous bronze sintere、
3. Steel backing
4. Copper plating

Note: Various materials are suitable for Hz20 series products according to different working conditions, such as bronze-backing, stainless steel backing and lead-free material.Hz20 is an environmental friendly lead-free product and its color is orange.

Technical Date

performance index	Data
Max.Load	70N/mm²
PV limit	22N/mm²-m/s
Temp.limit	-40C~+130℃
Friction Coeff	0.05~0.25μ
Speed limit	2.5m/s

d	D	Shaft Dia f7	Housing H7	Wall Thickness		Oil bore h	f1	f2	L⁰_-0.40
d	D	Shaft Dia f7	Housing H7	Min.	Max.	Oil bore h	f1	f2	40	50	60	80	90	95	100	110	120
65	70	65_-0.046	70^+0.030	2.415	2.460	4	1.8	0.6	6540		6560
70	75	70_-0.046	75^+0.030			4			7040	7050		7080
75	80	75_-0.046	80^+0.030			4			7540		7560	7580
80	85	80_-0.046	85^+0.035	2.385	2.450	4	1.8	0.6	8040		8060	8080
85	90	85_-0.054	90^+0.035			4			8540		8560	8580
90	95	90_-0.054	95^+0.035			4			9040		9060	9080	9090
100	105	100_-0.054	105^+0.035			4				10050		10080		10095
105	110	105_-0.054	110+0.035			6					10560	10580		10595
110	115	110_-0.054	115^+0.035			6					11060	11080		11095		105110
120	125	120_-0.054	125^+0.040			6	1.8	0.6			12060	12080				110110
125	130	125_-0.063	130^+0.040			6					12560					120110
130	135	130_-0.063	135^+0.040			6				13050	13060	13080			130100	125110
140	145	140_-0.063	145^+0.040			8				14050	14060	14080			140100
150	155	150_-0.063	155^+0.040			8				15050	15060	15080			150100
160	165	160_-0.063	165^+0.040			8				16050	16060	16080			160100
170	175	170_-0.063	175^+0.040			8				17050		17080			170100
180	185	180_-0.063	185^+0.046			8				18050	18060	18080			180100
190	195	190_-0.072	195^+0.046							19050	19060	19080			190100		190120
200	205	200_-0.072	205^+0.046							20050	20060	20080			200100		200120
220	225	220_-0.072	225^+0.046							22050	22060	22080			220100		220120
240	245	240_-0.072	245^+0.052							24050	24060	24080			240100		240120
250	255	250_-0.081	255^+0.052							25050	25060	25080			250100		250120
260	265	260_-0.081	265^+0.052							26050	26060	26080			260100		260120
280	285	280_-0.081	285^+0.052							28050	28060	28080			280100		280120
300	305	300_-0.081	305^+0.052							30050	30060	30080			300100		300120

d	D	Shaft Dia f 7	Housing H 7	Wall Thickness		Oil bore h	f1	f2	L⁰_-0.40
d	D	Shaft Dia f 7	Housing H 7	Min.	Max.	Oil bore h	f1	f2	40	50	60	80	90	95	100	110	120
65	70	65_-0.046	70^+0.030	2.415	2.460	4	1.8	0.6	6540		6560
70	75	70_-0.046	75^+0.030			4			7040	7050		7080
75	80	75_-0.046	80^+0.030			4			7540		7560	7580
80	85	80_-0.046	85^+0.035	2.385	2.450	4	1.8	0.6	8040		8060	8080
85	90	85 -0.054	90^+0.035			4			8540		8560	8580
90	95	90_-0.054	95^+0.035			4			9040		9060	9080	9090
100	105	100_-0.054	105^+0.035			4				10050		10080		10095
105	110	105_-0.054	110^+0.035			6					10560	10580		10595
110	115	110_-0.054	115^+0.035			6					11060	11080		11095		105110
120	125	120_-0.054	125^+0.040			6	1.8	0.6			12060	12080				110110
125	130	125_-0.063	130^+0.040			6					12560					120110
130	135	130_-0.063	135^+0.040			6				13050	13060	13080			130100	125110
140	145	140_-0.063	145^+0.040			8				14050	14060	14080			140100
150	155	150_-0.063	155^+0.040			8				15050	15060	15080			150100
160	165	160_-0.063	165^+0.040			8				16050	16060	16080			160100
170	175	170_{-0. 063}	175^+0.040			8				17050		17080			170100
180	185	180_-0.063	185^+0.046			8				18050	18060	18080			180100
190	195	190_-0.072	195^+0.046							19050	19060	19080			190100		190120
200	205	200_-0.072	205^+0.046							20050	20060	20080			200100		200120
220	225	220_-0.072	225^+0.046							22050	22060	22080			220100		220120
240	245	240_-0.072	245^+0.052							24050	24060	24080			240100		240120
250	255	250_-0.081	255^+0.052							25050	25060	25080			250100		250120
260	265	260_-0.081	265^+0.052							26050	26060	26080			260100		260120
280	285	280_-0.081	285^+0.052							28050	28060	28080			280100		280120
300	305	300_-0.081	305^+0.052							30050	30060	30080			300100		300120