SPIETH plain bearings are hydrodynamic lubricated radial plain bearings with adjustable section. Mainly used in the field of mechanical engineering, especially suitable for complex requirements of construction machine tools.
1.2. Hydrodynamic lubrication
Hydrodynamic lubrication refers to the flow caused by a running spindle filled with lubricant
Wedge clearance of plain bearing. Before the minimum gap in the direction of flow, the flow results in the thrust level that the liquid thrust in the lubricant has. When the wedge clearance, spindle revolutions and oil viscosity are correctly arranged, the resulting liquid thrust can lift even high-load spindles from the bearing surface. The effect is that the spindle "swims" above the lubricant layer.
1.3. Lubricating agent
The oil used for lubrication is mineral oil, mainly spindle oil. Their viscosity must be selected according to the operating conditions. For hydrodynamic lubricated plain bearings, trouble-free operation requires an adequate oil supply. . Therefore, the function of the lubricant is not only to generate hydrodynamic thrust in the wedge clearance, but also to transfer the frictional heat out of the area of the sliding surface.
1.4. Lubrication system
The most commonly used lubrication systems are: splash lubrication, centrifugal lubrication and external lubrication 5
The external lubrication of the pump is the best and most perfect lubrication system. Especially for high sliding speeds that require large amounts of oil, it is necessary to cool the external lubrication supply through the pump. For this lubrication system, any spindle position can be allowed. Only enough pump pressure is needed to coordinate loop and pipe resistance to ensure sufficient volume
Oils for temperature equations. As mentioned earlier, after the spindle begins to rotate, it will generate its own load-bearing liquid thrust.
1.5. seal
Plain bearings are fitted with washers to prevent lubricants from escaping from the internal system and to protect the bearing system from the intrusion of dust and moisture. The sealing system depends on the working conditions.
Contact or slide washers for low and medium speeds. Wear and friction heat limit its use. Application areas with circular velocities up to 12 m/s.
Higher sliding speeds require non-contact washers, such as seal threads for pressure seals, labyrinth seals or annular clearances with loosely inserted bronze sliding rings. Like annular clearance, spinning spindles produce hydrodynamic threads that are higher than the atmospheric pressure of the lubricant, and oil does not escape when the spindles are running. As long as the spindle is not running, all non-contact seals will have a small amount of oil leakage. It is known that this can be absorbed and returned to the lubricant tank.
2. Adjustable SPIETH radial plain bearing
2.1. Usage and benefits
This hydrodynamic segment radial plain bearing is suitable for use anywhere where bearing clearance and running smoothiness are required and an adequate supply of lubrication is ensured. Allow high and low frequencies to be the same as both directions.
Since the bearing clearance can be set and re-adjusted, there is no need for long adaptation between the bearing and the spindle. It is sufficient if the seat of the spindle and the holes in the housing are machined into a cylindrical shape according to the *** tolerance.
Today, this type of adjustable bearing is used successfully where surface quality and shape accuracy must be machined. GLM is used for spindle bearings in grinders, lathes, precision drilling or reverse bearings for milling mandrels and boring rods. For such machinery, for example, grinding and workpiece spindles with GLM bearings are used to achieve concentricity of less than 0.4mm.
One of the most underestimated advantages of GLM bearings is the damping effect of the hydrodynamic bearing system. The high absorbency of the fluid power steering device is useful for machining processes where high frequencies may occur due to the high durability of static components.
SPIETH hydraulic radial plain bearings are made of curved steel housing (a) with integrated clamping screws (b) and bearing bushing made of bearing bronze (c).
Bearings are configured in such a way that the mounting clearance (S1 + S2) will be eliminated after first tightening the clamping screws. After this, the radial choke of the inner bearing bushing will begin. This strangulation will be parallel to the axis. Any requested bearing clearance or adjustment can be set without any scraping
The lining sleeve has a number of axial lubrication grooves (d), which are connected to the outer plunges (f) in the steel housing through radial lubrication holes (e). Through this arrangement, the bushing is connected to the lubricating inlet (g) and outlet (h) in the housing hole.
The lubrication groove divides the bushing hole into several sliding surfaces. When adjusting the bearing clearance, these sliding surfaces will change their original radius, and wedge cracks will occur between the sliding surface and the spindle. The tightest point of this wedge crack will be in the middle of the sliding surface and will extend into the lubrication tank in both directions. SPIETH hydrodynamic radial plain bearings are independent of the direction of rotation of the spindle, as the lubricant can flow under the development pressure in the extrusion wedge crack, which allows the spindle to rise from the sliding surface of the bearing. Due to the rules of physics, the hydrodynamic lubrication process is all around the spindle, so it is inevitable that the spindle is centered.
The radial orientation of the bearing in the housing hole will be achieved by means of a cylindrical pin (i) which will be fitted in a groove to be machined in the housing.
2.3. Carry out
The zigzag steel shell serves as the regulating element and is made of special steel without hardening. The bushing is made of *** bearing bronze. This material was chosen for reasons of high safety and because of its emergency operation characteristics during emergency start and start-up, the lubrication layer may break and the metal contact between the spindle and the bearing will slip
Surface can happen.
Grinding bearing outer diameter according to tolerance h5; Hole machining to F6. Since the bearing is machined under compression conditions, it is not possible to control the hole in its untensioned conveying state.
Clamp screws installed shall be tightened using a wrench conforming to *** 2936.
1, the drawing mode is not affected by the lubrication effect of the bolt and the friction size of the thread, and the bolt load can be obtained more perfect;
2, multiple bolts can be stretched synchronously, so that the whole circle of bolts are evenly stressed and balanced load is obtained;
3, due to the use of advanced ultra-high pressure hydraulic technology, the bolt can be locked in a small space;
4. The residual load and payload obtained by tightening bolts in the tensile way are greater than that in the torque way;
5, the stretching method is more suitable for the joint application with high fastening accuracy, which can make the joint surface stressed evenly to achieve the joint and truly prevent leakage.
Stock model:
Spieth DSK 14.26
Spieth DSK 20.37
Spieth DSK 22.38
Spieth DSK 22.42
Spieth DSK 28.40
Spieth DSK 60.85
Spieth DSL 18.30
Spieth DSL 40.56
Spieth DSM 19.2
Spieth DSM 38.1
Spieth DSM 38.55
Spieth FSL 35.55
Spieth MSA 25.1,5
Spieth MSA 30.1,5
Spieth MSA 35.1,5
Spieth MSA 40.1,5
Spieth MSA 60.1,5
Spieth MSA 65.1,5
Spieth MSA 80.2
Spieth MSR 12.1
Spieth MSR 16.1,5
Spieth MSR 170.3
Spieth MSR 20.1,5
Spieth MSR 24.1,5
Spieth MSR 30.1,5
Spieth MSR 35.1,5
Spieth MSR 40.1,5
Spieth MSR 50.1,5
Spieth MSR 60.1,5
Spieth MSR 65.1,5
Spieth MSR 80.2
Spieth MSW 45.44
Model number
Spieth MSA Series
Spieth MSA 20x1
Spieth MSA 25x1.5
Spieth MSA 30x1.5
Spieth MSA 35x1.5
Spieth MSA 40x1.5
Spieth MSA 45x1.5
Spieth MSA 50x1.5
Spieth MSA 55x1.5
Spieth MSA 60x1.5
Spieth MSA 65x1.5
Spieth MSA 70x1.5
Spieth MSA 75x1.5
Spieth MSA 80x2
Spieth MSA 85x2
Spieth MSA 90x2
Spieth MSA 95x2
Spieth MSA 100x2
Spieth MSA 105x2
Spieth MSA 110x2
Spieth MSA 120x2
Spieth MSA 130x3
Spieth MSA 140x3
Spieth MSA 150x3
Spieth MSA 160x3
Spieth MSA 170x3
Spieth MSA 180x3
Spieth MSA 190x3
Spieth MSA 200x3
Spieth MSR series
Spieth MSR 10x0.75
Spieth MSR 10x1
Spieth MSR 12x1
Spieth MSR 12x1.5
Spieth MSR 14x1.5
Spieth MSR 15x1
Spieth MSR 16x1.5
Spieth MSR 17x1
Spieth MSR 18x1.5
Spieth MSR 20x1
Spieth MSR 20x1.5
Spieth MSR 22x1.5
Spieth MSR 24x1.5
Spieth MSR 25x1.5
Spieth MSR 26x1.5
Spieth MSR 28x1.5
Spieth MSR 30x1.5
Spieth MSR 32x1.5
Spieth MSR 35x1.5
Spieth MSR 38x1.5
Spieth MSR 40x1.5
Spieth MSR 42x1.5
Spieth MSR 45x1.5
Spieth MSR 48x1.5
Spieth MSR 50x1.5
Spieth MSR 52x1.5
Spieth MSR 55x1.5
Spieth MSR 55x2
Spieth MSR 58x1.5
The Spieth DSM series
Spieth DSM 14.2
Spieth DSM 16.1
Spieth DSM 16.2
Spieth DSM 16.28
Spieth DSM 18.2
Spieth DSM 18.30
Spieth DSM 19.1
Spieth DSM 19.2
Spieth DSM 19.32
Spieth DSM20.1
Spieth DSM 20.2
Spieth DSM 20.32
Spieth DSM 22.1
Spieth DSM 22.2
Spieth DSM 22.35
Spieth DSM 24.1
Spieth DSM 24.2
Spieth DSM 24.36
Spieth DSM 25.1
Spieth DSM 25.2
Spieth DSM 25.37
Spieth DSM 28.1
Spieth DSM 28.2
Spieth DSM 28.40
Spieth DSM 30.1
Spieth DSM 30.2
Spieth DSM 30.42
Spieth DSM 32.1
Spieth DSM 32.2
Spieth DSM 32.48
Spieth DSK Series
Spieth DSK 14.26
Spieth DSK 15.28
Spieth DSK 16.28
Spieth DSK 16.32
Spieth DSK 18.30
Spieth DSK 18.35
Spieth DSK 20.32
Spieth DSK 20.37
Spieth DSK 20.40
Spieth DSK 22.35
Spieth DSK 22.38
Spieth DSK 22.42
Spieth DSK 25.37
Spieth DSK 25.42
Spieth DSK 25.45
Spieth DSK 28.40
Spieth DSK 28.45
Spieth DSK 28.48
Spieth DSK 30.42
Spieth DSK 30.47
Spieth DSK 30.50
Spieth DSK 30.55
Spieth DSK 32.48
Spieth DSK 32.52
Spieth DSK 32.56
Spieth DSK 35.52
Spieth DSK 35.55
Spieth DSK 35.60
Spieth DSK 40.56
Spieth DSK 40.62
Spieth DSK 40.65
Spieth DSL series
Spieth DSL 14.26
Spieth DSL 15.28
Spieth DSL 16.28
Spieth DSL 16.32
Spieth DSL 18.30
Spieth DSL 18.35
Spieth DSL 20.32
Spieth DSL 20.37
Spieth DSL 20.40
Spieth DSL 22.35
Spieth DSL 22.38
Spieth DSL 22.42
Spieth DSL 25.37
Spieth DSL 25.42
Spieth DSL 25.45
Spieth DSL 28.40
Spieth DSL 28.45
Spieth DSL 28.48
Spieth DSL 30.42
Spieth DSL 30.47
Spieth DSL 30.50
Spieth DSL 30.55
Spieth DSL 32.48
Spieth DSL 32.52
Spieth DSL 32.56
Spieth DSL 35.52
Spieth DSL 35.55
Spieth DSL 35.60
Spieth DSL 40.56
Spieth DSL 40.62
Spieth DSL 40.56
Spieth DSL 40.62
spieth AK series
spieth AK 10.15
spieth AK 12.18
spieth AK 14.20
spieth AK 15.22
spieth AK 16.22
spieth AK 18.25
spieth AK 20.32
spieth AK 22.35
spieth AK 25.37
spieth AK 28.40
spieth AK 30.42
spieth AK 32.48
spieth AK 35.52
spieth AK 40.56
spieth AK 45.68
spieth AK 50.72
spieth AK 55.80
spieth AK 60.85
spieth AK 63.88
spieth AK 65.90
spieth AK 70.100
spieth AK 75.105
spieth AK 80.110
spieth AK 85.115
spieth AK 90.120
spieth AK 95.125
spieth AK 100.130
spieth AK 110.140
spieth AK 120.150
spieth AK 125.155
spieth AK 130.160
spieth AK 140.170
spieth AK 150.180
Spieth plain bearing FSL 35.55 in stock
The spieth AL series
spieth AL 8.12
spieth AL 10.15
spieth AL 12.18
spieth AL 14.20
spieth AL 15.22
spieth AL 16.22
spieth AL 18.25
spieth AL 20.32
spieth AL 22.35
spieth AL 25.37
spieth AL 28.40
spieth AL 30.42
spieth AL 32.48
spieth AL 35.52
spieth AL 40.56
spieth AL 45.68
spieth AL 50.72
spieth AL 55.80
spieth AL 60.85
spieth AL 63.88
spieth AL 65.90
spieth AL 70.100
spieth AL 75.105
spieth AL 80.110
spieth AL 85.115
spieth AL 90.120
spieth AL 95.125
spieth AL 100.130
spieth AL 110.140
spieth AL 120.150
spieth AL 125.155
spieth AL 130.160
spieth AL 140.170
spieth AL 150.180
Spieth IK Series
Spieth IK 8.12
Spieth IK 10.15
Spieth IK 12.18
Spieth IK 14.20
Spieth IK 15.22
Spieth IK 16.22
Spieth IK 18.25
Spieth IK 20.32
Spieth IK 22.35
Spieth IK 25.37
Spieth IK 28.40
Spieth IK 30.42
Spieth IK 32.48
Spieth IK 35.52
Spieth IK 40.56
Spieth IK 45.68
Spieth IK 50.72
Spieth IK 55.80
Spieth IK 60.85
Spieth IK 63.88
Spieth IK 65.90
Spieth IK 70.100
Spieth IK 75.105
Spieth IK 80.110
Spieth IK 85.115
Spieth IK 90.120
Spieth IK 95.125
Spieth IK 100.130
Spieth IK 110.140
Spieth IK 120.150
Spieth IK 125.155
Spieth IK 130.160
Audited Supplier 
){kind=link}