HOWA-TECH BEARINGS
products
Our material range combines nearly all high-performing Sliding Materials. For easy selection, we categorised them in four main groups.
HOWA SOLID MACHINED BEARINGS
Developed to meet the toughest and most unique application requirements.
Most materials of this category combine following features:
- Exceptional durability
- Self-lubricating
- Wide range of temperature resistance
- Low wear rates
- Operation in Sea-water or chemicals
- Handling of shock loads and misalignments
HOWA SLB
Bronze Alloy with Incorporated Solid Lubricant Plugs
Material Grade
120
150
280
480
Max. Load Capacity Dynamic
N/mm2
60
95
170
180
Max. Load Capacity Static
N/mm2
130
180
280
330
Coefficient of Friction
dry
0.08-0.12
0.10-0.12
0.10-0.15
0.12-0.17
Coefficient of Friction
greased
0.06-0.10
0.06-0.20
0.08-0.12
0.08-0.12
Max. Sliding Speed
m/s
0.6
0.4
0.4
0.2
PV Value
N/mm2*m/s
1
1
1.5
1.2
Temperature Strain
min. / max.°C
-40/250
-40/300
-40/350
-40/350
HOWA BRZ
Bronze Material in Various Alloys
Material Grade
90
120
150
280
480
Load Capacity Dynamic (Dependent on Grease Pressure Resistance)
N/mm2
50
60
70
120
120
Max. Load Capacity Static
N/mm2
130
160
220
340
400
Coefficient of Friction
greased
0.06-0.10
0.06-0.10
0.06-0.20
0.08-0.12
0.08-0.12
Max. Sliding Speed (Grease Lubricated)
m/s
3
2.5
2
2
1
Temperature Strain
min./max.°C
-40/250
-40/250
-40/300
-40/350
-40/350
HOWA COMP
Fibre Reinforced Polymer Composite
Material Grade
785
786
787
788
Compressive Strength
N/mm2
345
345
310
350
Max. Load Capacity Dynamic
N/mm2
80
80
60
80
Max. Load Capacity Static
N/mm2
200
200
180
200
Coefficient of Friction
dry
0.13-0.18
0.10-0.12
0.07-0.09
0.13-0.18
Coefficient of Friction
greased
(<0.1)
(<0.1)
(<0.1)
(<0.1)
Max. Sliding Speed (Grease Lubricated)
m/s
0.1
0.1
0.2
0.1
PV Value
N/mm2*m/s
0.75
1
1.25
0.5
Temperature Strain
min. / max.°C
-70/100
-70/100
-70/100
-70/150
HOWA COMP FG
PTFE Lining with Fibreglass Backing
Compressive Strength
N/mm2
350
Max. Load Capacity Dynamic
N/mm2
140
Max. Load Capacity Static
N/mm2
210
Coefficient of Friction
dry
0.04-0.1
Max. Sliding Speed (Grease Lubricated)
m/s
0.1
PV Value
N/mm2*m/s
1.5
Temperature Strain
min. / max.°C
-70/140
HOWA STL
Hardened Bearing Steel
Max. Load Capacity Dynamic (Depandant on Grease Pressure Resistance)
N/mm2
150
Max. Load Capacity Static
N/mm2
400
Coefficient of Friction
greased
0.15-0.3
Max. Sliding Speed (Grease Lubricated)
m/s
0.2
PV Value
N/mm2*m/s
1.5
Temperature Strain
min. / max.°C
-30/300
HOWA STL-MN
Hardened Manganese Steel
Max. Load Capacity Dynamic
N/mm2
70
Max. Load Capacity Static
N/mm2
500
Coefficient of Friction
dry
0.15-0.25
Max. Sliding Speed (dry)
m/s
0.1
PV Value
N/mm2*m/s
0.5
Temperature Strain
min. / max.°C
-50 / 400
HOWA FAB-X
PTFE Fabric Liner on Various Material Backings
Backing Material
Bronze
Mild Steel
Stainless Steel
Load Capacity Dynamic
N/mm2
180
180
200
Load Capacity Static
N/mm2
250
280
300
Coefficient of Friction
dry
0.03-0.06
0.03-0.06
0.03-0.06
Max. Sliding Speed
m/s
0.15
0.15
0.15
Temperature Strain
min./max.°C
-50/150
-50/150
-50/150
HOWA SINT
Oil Impregnated
Sintered Bronze
Max. Load Capacity Dynamic
N/mm2
10
Max. Load Capacity Static
N/mm2
50
Coefficient of Friction
dry
0.05-0.15
Max. Sliding Speed (dry)
m/s
6
PV Value
N/mm2*m/s
1.7
Temperature Strain
min. / max.°C
-20 / 120
HOWA SMG
Homogenous Bearing
Alloys made with
Powder Metallurgy
Material Grade
SMG 520
SMG 523
SMG 524
SMG 530
SMG 533
SMG 535
Compressive Strength
N/mm2
250
350
400
560
400
380
Max. Load Capacity Dynamic
N/mm2
90
115
130
70
50
55
Max. Load Capacity Static
N/mm2
180
230
250
155
100
105
Hardness
HB
55
85
50
80
45
40
Coefficient of Friction
dry
0.11-0.16
0.12-0.18
0.14-0.21
0.25-0.45
0.25-0.45
0.30-0.50
Coefficient of Friction
in water
0.10-0.14
0.11-0.17
0.13-0.18
–
–
–
Max. Sliding Speed
m/s
0.35
0.35
0.5
0.2
0.2
0.2
PV Value
N/mm2*m/s
1.5
1.5
1.5
1.0
0.8
0.8
Temperature Strain
min. / max.°C
-100/350
-100/350
-100/350
0/650
-200/200
-200/450
Min. Counter Material Hardness
HRC
35
45
20
45
45
45
Base Metal Alloy
Bronze
Bronze
Bronze
Iron-Nickel
Nickel
Nickel-Copper
HOWA SPHERICAL PLAIN BEARINGS
These self-aligning bearings are offered as standard steel bearings and as ultra-versatile SLB and COMP types.
HOWA SPHERE SLB
HOWA SPHERE SLB Bearing Material Paired with Stainless Steel
- Highly Robust and Extremely Wear-Resistant
- Maintenance-Free but Lubrication Permitted
- Corrosion Resistant and Non-Seizing
- Sea-Water Resistant
- Available as Fixed and Floating Bearing
- Sized in Accordance to ISO 12240 but also Customisable
HOWA SPHERE COMP
HOWA SPHERE COMP Bearing Material Paired with Stainless Steel
- Wear Resistant and Low Friction Bearing
- Maintenance-Free but Lubrication Permitted
- Ideal for Micro-movements
- Corrosion Resistant and Non-Seizing
- Sea-Water Resistant
- Available as Fixed and Floating Bearing
- Sized in Accordance to ISO 12240 but also Customisable
HOWA SPHERE STL
HOWA SPHERE STL, Hardened Bearing Steel
- Available as Lubrication-Bound and Self-Lubricating Bearing
- Dimensions are in Accordance to ISO 12240
- Suitable for a Wide Range of Applications
- High Quality and Cost Effective
HOWA ROLLED BEARINGS
Proven in the market for decades especially in series production for the following reasons:
- Standardised to ISO 3547 (DIN1494)
- Suit demands of wide range of applications
- Slim and compact design
- Inexpensive and fast availability
- Durable and maintenance-free materials available
- Sufficient lifespan to meet most repair intervals
HOWA PF
PTFE Coated Bearing with Various Backing Materials
Max. Load Capacity Dynamic
N/mm2
140
Max. Load Capacity Static
N/mm2
250
Coefficient of Friction
dry
0.03-0.15
Max. Sliding Speed
m/s
2.5
PV Value
N/mm2*m/s
1.6
Temperature Strain
min./ max.°C
-200 / 250
HOWA PM
POM Resin Coated Steel Backing
Max. Load Capacity Dynamic
N/mm2
140
Max. Load Capacity Static
N/mm2
250
Coefficient of Friction
greased
0.03-0.10
Max. Sliding Speed
m/s
2.5
PV Value
N/mm2*m/s
2.6
Temperature Strain
min./ max.°C
-40 / 170
HOWA BZ
Tin-Bronze with Lube Pockets
Max. Load Capacity Dynamic
N/mm2
60
Max. Load Capacity Static
N/mm2
150
Coefficient of Friction
greased
0.06-0.15
Max. Sliding Speed
m/s
2.5
PV Value
–
2.8
Temperature Strain
min. / max.°C
-40 / 200
HOWA BMG
Graphite Impregnated Bronze Layer on Various Backing Materials
Max. Load Capacity Dynamic
N/mm2
150
Max. Load Capacity Static
N/mm2
280
Coefficient of Friction
dry
0.13-0.22
Coefficient of Friction
greased
0.10-0.15
PV Value
–
0.4
Temperature Strain
min. / max.°C
-80 / 250
HOWA CUSTOM DESIGN BEARINGS
At HOWA it is our aim to design the most practical, cost-effective and application-based-performing bearings. We always approach each project with an open mind, considering the experience from similar applications and yet thinking from scratch again.
All bearings from the Solid Machined Bearings range are produced-to-order. That offers full flexibility to achieve special geometrical shapes, sizes, tolerances, design features and anything else which make our bearings the most suitable for your application.
Applying our vast design experience, we develop custom-bearings for the most demanding and unique application requirements. Reach out to our Howa Team and get expert support.
Straight Bearing
The simple shape of a straight bush is the most commonly used bearing geometry, allowing the transfer of radial forces. Lubrication grooves and holes, cut-outs, etc. can be included with full flexibility.
Flanged Bearing
Next to radial forces, this bush design transfers axial forces via the flange face. The bush can be machined with mounting holes, lubrication channels, special dimensional tolerances and many other features.
Liners / Plates
Liner plates allow sliding motion in X and Y direction. They are available in round, oval, rectangular and square shapes featured with lubrication grooves, recessions and mounting features such as countersunk and tapped holes.
Half-Shell Bearings
A pair of Half-Shell Bushes is used when the assembly situation (or during future repairs) is unfavourable to the common axial assembly direction of the shaft. The shells are machined into perfect halves of each 180 degrees, ensuring full concentricity once installed into bore.
Spherical Plain Bearings
The matching spherical surfaces enable the bearing to self-align and balance-out misalignments of the adjacent structure. Our Spherical Plain Bearings follow the dimensions of DIN EN 12240-1 standard.
For all unique and highly demanding applications, we gladly go beyond this standard to create new design variations and develop the highest performing and the most cost-effective custom bearings.
Asymmetrical Spherical Plain Bearings
This design approach enables the spherical bearing to handle significantly higher axial forces than the standard radial bearing design. Its compact design minimises installation spaces and makes costly combinations of single Radial and Axial Bearings redundant.
Spherical Trunnion Bearings
This compact bearing design is meant to handle bi-directional radial – and axial forces occur. It can handle large misalignments through a flexible tilt angle setting. This bearing eliminates the need for complex bearing combinations and convinces with uncomplicated installation requirements.
Spherical Plates
Ideal for implementation in large steel structures where parallelism and dimensional accuracy are uncertain. The spherical surface accommodates omni-directional rotation and ensures even load distribution. The flat surface on the opposite site enables linear sliding motion to compensate expansion and contraction.
Typical applications are bridges, large roof and pipe structures and other heat generating installations that need underlay thermal contractions and expansions.
Special Shaped Bearings
Virtually any mechanically machinable shape can be transformed with our vast material selection into a sliding bearing. Single or multiple sliding surfaces, various bearing directions and anything else which seems impossible at first sight, is our speciality.
