Slewing Ring Bearing

The four-point contact ball turntable bearing is primarily composed of inner and outer rings, a single row of steel balls, a cage (or separator), and sealing devices. The inner and outer rings can be either integral or split structures. Integral rings offer relatively strong rigidity, while split structures provide easier adjustment; the two split rings are bolted together before leaving the factory.

Generally, four-point contact ball turntable bearings include a cage (or separator). A full ball structure is used only under heavy load conditions, as it offers higher load capacity but also increased friction, which can lead to scratches on the surface of the steel balls.

The basic structures of four-point contact ball turntable bearings / slewing rings include non-geared, external geared, and internal geared types, all of which have a relatively high static load capacity.

Table of Gear Basic Parameters

Model	Tooth Profile Type	Module (m)	Number of Teeth (Z)	Pressure Angle (α)	Addendum Coefficient (h)	Profile Shift Coefficient (x)
TEC - 150P750SP	Involute	1.5	110	20°	1.0	0
TEC - 167P400SP	Involute	Not clearly given	114	20°	1.0	0
TEC - 167(V2.1)	Involute	3	40	20°	1.0	0
TEC - 300	Involute	2.5	127	20°	1.0	-0.28
TEC - 410	Involute	2.5	180	20°	1.0	-0.28

 

Table of Span and Deviation Related Parameters

Model	Span	Number of Teeth Measured Across (K)	Upper Deviation (Es)	Lower Deviation (Es)
TEC - 150P750SP	57.66	13	No clear unit marked (should be mm according to context)	No clear unit marked (should be mm according to context)
TEC - 167P400SP	7.9	13	-0.198	Unit not clearly stated but should be mm according to context
TEC - 167	87.83	12	-0.320	No clear unit marked (should be mm according to context)
TEC - 300	103.6	14	No clear unit marked (should be mm according to context)	No clear unit marked (should be mm according to context)
TEC - 410	14.74	20	Upper deviation corresponding information not clearly stated (name in table is Etes Wk Ebei, different from others)	Lower deviation corresponding information not clearly stated (name in table is Etes Wk Ebei, different from others)

 

Table of Precision Related Parameters

Model	Single Tooth Pitch Deviation (±f pt)	Cumulative Pitch Deviation (Fp)	Tooth Profile Evaluation Range	Total Tooth Profile Deviation (Fa)	Helix Evaluation Range	Total Helix Deviation (Fβ)	Radial Runout (Fγ)
TEC - 150P750SP	±0.012	0.049	No clear unit marked (should be mm according to context)	0.014	No clear unit marked (should be mm according to context)	0.016	0.039
TEC - 167P400SP	±0.024	0.098	9.30	0.028	17	0.032	0.078
TEC - 167	±0.026	0.036	14.03	0.100	13.10	0.032	0.080
TEC - 300	±0.029	0.131	11.39	0.041	19	0.034	0.105
TEC - 410	±0.029 (presumed ±f zone is ±f pt)	0.131	11.75	0.041	23.75 (presumed LA is Lβ)	0.038	0.105 (presumed Fy is Fγ)

 

Applications

Forklift AGVs
The operating environment faced by forklift AGVs is relatively complex. Therefore, the slewing bearing for AGVs (Automated Guided Vehicles) used on the driving wheels also needs stronger stability, and the surface also needs special treatment to face special environments.

CT
During the operation of the CT machine, the X-ray tube and the detector rotate around the patient simultaneously. This can generate cross-sectional images. Through them, doctors can obtain information valuable for their diagnosis.
In the high-speed rotation process of the CT machine, in order to ensure a quiet medical environment, low-noise and high-operating-precision slewing bearings (turntable bearings) for medical equipment are extremely important.

 

Six Key Quality Assurances

 

Professional Technical Team

Skilled Technicians

Advanced Production Equipment

Experienced Production Personnel

Strict Testing Procedures

Company Factory

 

FAQ

 

Q: What does a slewing bearing do?

A: Slewing bearings comprise an inner ring and an outer ring, one of which usually incorporates a gear. Together with attachment holes in both rings, they enable an optimized power transmission with a simple and quick connection between adjacent machine components.

Q: What are the applications of slewing bearings?

A: Slewing bearings enable and facilitate the rotational motion of wind turbines, excavators, cranes and tunnel boring machines, just to name a few.

Q: How do I choose a slewing bearing?

A: A number of application requirements impact the selection of an appropriate slewing bearing. These considerations include, among others, rotational speed, protection from contamination, accuracy, frictional resistance, and temperature range of the operating environment.

 

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