Product Description

Auto Parts Car Front Wheel Hub Bearings

                                                          Application  

            Papermaking machinery                                                                      Speed Reducer   

          Railway Vehicle Axle                                                                  Gear Box Bearing Seat Of Rolling Mill,
          
          Roller Crusher, Vibrating Screen                                                Printing Machinery

          Woodworking Machinery                                                             Various Industrial Reducer

          Vertical Belt Seat Adjusting Center Bearing                                Lifting Transportation 
   

Wheel hub bearing’s main function is to provide accurate CZPT for the rotation of the wheel hub, it carry axial load,
and bear radial load, is a very important component.Wheel hub bearing unit is in the standard angular contact ball bearings
and tapered roller bearings, on the basis of it will be 2 sets of bearing as a whole, the advantages are the assembly
performance is good, can omit clearance adjustment, light weight, tight structure, and load capacity is big, can first fill grease
when sealed bearing, omit the external wheel hub seal and no maintenance etc, and has been widely used in cars,
in a truck also has a tendency to gradually expand the application.

Chrome Steel Wheel Hub Bearings   

Product Name	Wheel Hub Bearings
Precision Rating	P6, P0, P5, P4, P2
Material	Bearing Steel	43(45)	82	37	37	0.76
DAC367629.2/27	36	76	29.2	27	0.55	DAC4482.50037	44	82.5	37	37	0.73
DAC3676571/27	36	76	29	27	0.55	DAC44840042/40	44	84	42	40	0.92
DAC37680034	37	68	34	34	0.52	DAC45770050/45	45	77	50	45
DAC37720033	37	72	33	33	0.58	DAC45800045	45	80	45	45	0.78
DAC37720037	37	72	37	37	0.59	DAC45830039	45	83	39	39	0.83
DAC37725717	37	72.02	37	37	0.59	DAC45840039	45	84	39	39	0.85
DAC3772571	37	72.04	37	37	0.59	DAC45840041/39	45	84	41	39	0.8
DAC37740037	37	74	37	37	0.61	DAC45840042/40	45	84	42	40	0.94
DAC37740045	37	74	45	45	0.79	DAC45840043	45	84	43	43	0.96
DAC38640032/29	38	64	32	39		DAC45840045	45	84	45	45	1
DAC38640036/33	38	64	36	33		DAC45840053	45	84	53	53
DAC38640036/33	38	64	36	33		DAC4585571	45	85	23	23	0.54
DAC38650052/48	38	65	52	48		DAC458500302	45	85	30.2	30.2	0.63
DAC38700037	38	70	37	37	0.56	DAC45850045	45	85	45	45	0.96
DAC38700038	38	70	38	38	0.57	DAC45850047	45	85	47	47	0.98
DAC38710033/30	38	71	33	30	0.5	DAC45850051	45	85	51	51	1.02
DAC38710039	38	71	39	39	0.58	DAC45870041/39	45	87	41	39	0.92
DAC38715713/30	38	71.02	33	30	0.5	DAC45880039	45	88	39	39	0.9
DAC38720036/33	38	72	36	33	0.56	DAC45900054/51	45	90	54	51
DAC38725716/33	38	72.02	36	33	0.56	DAC46780049	46	78	49	49
DAC38720034	38	72	34	34	0.55	DAC46800043/40	46	80	43	40
DAC38720040	38	72	40	40	0.63	DAC47810053	47	81	53	53	1.02
DAC38730040	38	73	40	40	0.67	DAC47850045	47	85	45	45	0.85
DAC38740036	38	74	36	36	0.62	DAC47880055	47	88	55	55
DAC38740036/33	38	74	36	33	0.61	DAC47880055	47	88	55	55
DAC38745716/33	38	74.02	36	33	0.59	DAC47880057.4	47	88	57.4	57.4
DAC38740040	38	74	40	40	0.67	DAC48860042/40	48	86	42	40	0.96
DAC38740050	38	74	50	50	0.85	DAC48890044	48	89	44	44	1.07
DAC38740450	38	74.04	50	50	0.85	DAC48890044/42	48	89	44	42	1.07
DAC38760043/40	38	76	43	40		DAC48900042	48	90	42	42	1.09
DAC38760043	68	76	43	43		DAC49840042/40	49	84	42	40	0.99
DAC3885716/33	38	80.02	36	33		DAC49840043	49	84	43	43
DAC39/41750037	39/41	75	37	37	0.62	DAC49840048	49	84	48	48	1.06
DAC39680037	39	68	37	37	0.48	DAC49840050	49	84	50	50	1.08
DAC39680637	39	68.06	37	37	0.48	DAC49880046	49	88	46	46	1.05
DAC3968571	39	68.07	37	37	0.48	DAC49900045	49	90	45	45	1.08
DAC39720037	39	72	37	37	0.6	DAC50900040	50	90	40	40
DAC39720037	39	72	37	37	0.6	DAC51890044/42	51	89	44	42
DAC39720637	39	72.06	37	37	0.6	DAC51910044	51	91	44	44
DAC39720040	39	72	40	40	0.61	DAC51960050	51	96	50	50
DAC39740036	39	74	36	36	0.54	DAC52910040	52	91	40	40
DAC39740036/34	39	74	36	34	0.52	DAC54900050	54	90	50	50
DAC39740039	39	74	39	39	0.66	DAC54920050	54	92	50	50
DAC39.1740036/34	39.1	74	36	34	0.66	DAC54960051	54	96	51	51
DAC40700043	40	70	43	43	0.63	DAC55900060	55	90	60	60

                                                                         About Us
HENGLI Machinery Company is a well-established Chinese bearing supplier. We design, manufacture and wholesale bearings.
Our specialized manufacturer of Spherical Roller Bearing & Cylindrical Roller Bearing, XIHU (WEST LAKE) DIS. Rolling Bearing Co., Ltd was established in 1970 and is accredited by the Chinese Ministry of Machine Building.

We invested in 2 additional specialized bearing factories, which allow us to provide our clients with top of the line products such 
as Needle Roller Bearings, Spherical Plain Bearings, Rod Ends Bearings, Ball Joint Bearings, Tapered Roller Bearings, Wheel Hub Bearings and Non-Standard Bearings.

 

 

FAQ
Q1 – What is our advantages?

     A    – Manufacturer – Do it only with the Best;

            -Your Choice make different. 

Q2 – Our Products

 A   – Spherical Roller Bearing, Cylindrical Roller Bearing, Needle Roller Bearing, Cam Followers, Thrust Bearing

      – Spherical Plain Bearing, Rod End, Ball Joint, Wheel Hub, Tapered Roller Bearing

Q3 – Process of our production

 A – Heat Treatment – Grinding – Parts Inspection – Assembly – Final Inspection – Packing

Q4 – How to customize bearing(non-standard) from your company?

 A -We offer OEM,Customized(Non-standard) service and you need to provide drawing and detailed Technical Data.

Q5 –   What should I care before installation?

 A   – Normally, the preservative with which new bearings are coated before leaving the factory does not need to be

        removed; it is only necessary to wipe off the outside cylin­drical surface and bore, if the grease is not compatible

        with the preservative, it is necessary to wash and carefully dry the bearing.

      -Bearings should be installed in a dry, dust-free room away from metal working or other machines producing

        swarf and dust.

Q6 – How to stock and maintenance my bearings right? 

 A   – Do not store bearings directly on concrete floors, where water can condense and collect on the bearing;

      -Store the bearings on a pallet or shelf, in an area where the bearings will not be subjected to high humidity

       or sudden and severe temperature changes that may result in condensation forming;

      -Always put oiled paper or, if not available, plastic sheets between rollers and cup races of tapered roller bearings.

 

How to Calculate the Diameter of a Worm Gear

In this article, we will discuss the characteristics of the Duplex, Single-throated, and Undercut worm gears and the analysis of worm shaft deflection. Besides that, we will explore how the diameter of a worm gear is calculated. If you have any doubt about the function of a worm gear, you can refer to the table below. Also, keep in mind that a worm gear has several important parameters which determine its working.

Duplex worm gear

A duplex worm gear set is distinguished by its ability to maintain precise angles and high gear ratios. The backlash of the gearing can be readjusted several times. The axial position of the worm shaft can be determined by adjusting screws on the housing cover. This feature allows for low backlash engagement of the worm tooth pitch with the worm gear. This feature is especially beneficial when backlash is a critical factor when selecting gears.
The standard worm gear shaft requires less lubrication than its dual counterpart. Worm gears are difficult to lubricate because they are sliding rather than rotating. They also have fewer moving parts and fewer points of failure. The disadvantage of a worm gear is that you cannot reverse the direction of power due to friction between the worm and the wheel. Because of this, they are best used in machines that operate at low speeds.
Worm wheels have teeth that form a helix. This helix produces axial thrust forces, depending on the hand of the helix and the direction of rotation. To handle these forces, the worms should be mounted securely using dowel pins, step shafts, and dowel pins. To prevent the worm from shifting, the worm wheel axis must be aligned with the center of the worm wheel’s face width.
The backlash of the CZPT duplex worm gear is adjustable. By shifting the worm axially, the section of the worm with the desired tooth thickness is in contact with the wheel. As a result, the backlash is adjustable. Worm gears are an excellent choice for rotary tables, high-precision reversing applications, and ultra-low-backlash gearboxes. Axial shift backlash is a major advantage of duplex worm gears, and this feature translates into a simple and fast assembly process.
When choosing a gear set, the size and lubrication process will be crucial. If you’re not careful, you might end up with a damaged gear or 1 with improper backlash. Luckily, there are some simple ways to maintain the proper tooth contact and backlash of your worm gears, ensuring long-term reliability and performance. As with any gear set, proper lubrication will ensure your worm gears last for years to come.

Single-throated worm gear

Worm gears mesh by sliding and rolling motions, but sliding contact dominates at high reduction ratios. Worm gears’ efficiency is limited by the friction and heat generated during sliding, so lubrication is necessary to maintain optimal efficiency. The worm and gear are usually made of dissimilar metals, such as phosphor-bronze or hardened steel. MC nylon, a synthetic engineering plastic, is often used for the shaft.
Worm gears are highly efficient in transmission of power and are adaptable to various types of machinery and devices. Their low output speed and high torque make them a popular choice for power transmission. A single-throated worm gear is easy to assemble and lock. A double-throated worm gear requires 2 shafts, 1 for each worm gear. Both styles are efficient in high-torque applications.
Worm gears are widely used in power transmission applications because of their low speed and compact design. A numerical model was developed to calculate the quasi-static load sharing between gears and mating surfaces. The influence coefficient method allows fast computing of the deformation of the gear surface and local contact of the mating surfaces. The resultant analysis shows that a single-throated worm gear can reduce the amount of energy required to drive an electric motor.
In addition to the wear caused by friction, a worm wheel can experience additional wear. Because the worm wheel is softer than the worm, most of the wear occurs on the wheel. In fact, the number of teeth on a worm wheel should not match its thread count. A single-throated worm gear shaft can increase the efficiency of a machine by as much as 35%. In addition, it can lower the cost of running.
A worm gear is used when the diametrical pitch of the worm wheel and worm gear are the same. If the diametrical pitch of both gears is the same, the 2 worms will mesh properly. In addition, the worm wheel and worm will be attached to each other with a set screw. This screw is inserted into the hub and then secured with a locknut.

Undercut worm gear

Undercut worm gears have a cylindrical shaft, and their teeth are shaped in an evolution-like pattern. Worms are made of a hardened cemented metal, 16MnCr5. The number of gear teeth is determined by the pressure angle at the zero gearing correction. The teeth are convex in normal and centre-line sections. The diameter of the worm is determined by the worm’s tangential profile, d1. Undercut worm gears are used when the number of teeth in the cylinder is large, and when the shaft is rigid enough to resist excessive load.
The center-line distance of the worm gears is the distance from the worm centre to the outer diameter. This distance affects the worm’s deflection and its safety. Enter a specific value for the bearing distance. Then, the software proposes a range of suitable solutions based on the number of teeth and the module. The table of solutions contains various options, and the selected variant is transferred to the main calculation.
A pressure-angle-angle-compensated worm can be manufactured using single-pointed lathe tools or end mills. The worm’s diameter and depth are influenced by the cutter used. In addition, the diameter of the grinding wheel determines the profile of the worm. If the worm is cut too deep, it will result in undercutting. Despite the undercutting risk, the design of worm gearing is flexible and allows considerable freedom.
The reduction ratio of a worm gear is massive. With only a little effort, the worm gear can significantly reduce speed and torque. In contrast, conventional gear sets need to make multiple reductions to get the same reduction level. Worm gears also have several disadvantages. Worm gears can’t reverse the direction of power because the friction between the worm and the wheel makes this impossible. The worm gear can’t reverse the direction of power, but the worm moves from 1 direction to another.
The process of undercutting is closely related to the profile of the worm. The worm’s profile will vary depending on the worm diameter, lead angle, and grinding wheel diameter. The worm’s profile will change if the generating process has removed material from the tooth base. A small undercut reduces tooth strength and reduces contact. For smaller gears, a minimum of 14-1/2degPA gears should be used.

Analysis of worm shaft deflection

To analyze the worm shaft deflection, we first derived its maximum deflection value. The deflection is calculated using the Euler-Bernoulli method and Timoshenko shear deformation. Then, we calculated the moment of inertia and the area of the transverse section using CAD software. In our analysis, we used the results of the test to compare the resulting parameters with the theoretical ones.
We can use the resulting centre-line distance and worm gear tooth profiles to calculate the required worm deflection. Using these values, we can use the worm gear deflection analysis to ensure the correct bearing size and worm gear teeth. Once we have these values, we can transfer them to the main calculation. Then, we can calculate the worm deflection and its safety. Then, we enter the values into the appropriate tables, and the resulting solutions are automatically transferred into the main calculation. However, we have to keep in mind that the deflection value will not be considered safe if it is larger than the worm gear’s outer diameter.
We use a four-stage process for investigating worm shaft deflection. We first apply the finite element method to compute the deflection and compare the simulation results with the experimentally tested worm shafts. Finally, we perform parameter studies with 15 worm gear toothings without considering the shaft geometry. This step is the first of 4 stages of the investigation. Once we have calculated the deflection, we can use the simulation results to determine the parameters needed to optimize the design.
Using a calculation system to calculate worm shaft deflection, we can determine the efficiency of worm gears. There are several parameters to optimize gearing efficiency, including material and geometry, and lubricant. In addition, we can reduce the bearing losses, which are caused by bearing failures. We can also identify the supporting method for the worm shafts in the options menu. The theoretical section provides further information.