Product Description

DEMAISI  95x130x13/16 – 7185250 / 45712143 / 45712140 CASSETTE OIL SEAL FOR 
IVECO DAILY SPARE PARTS
 

The cassette seals are generally made up of a sleeve, sealing lip with a spring and several anti-dust lips integrated into a labyrinth system to protect against external pollution, and are distinguished by greater system reliability and longevity. Furthermore, their friction surface, which has been adjusted and finished beforehand, does not require any shaft maintenance during replacement.

a.Metal/rubber outside diameter
The cassette seal’s outside diameter design provides better static sealing against low-or high-viscosity fluids, limited bounce-back effect, accurate positioning and a solid foundation for the seal in its housing, as well as better heat dispersion.
b.Pre-lubricated areas
Depending on the application, a compatible lubricant is applied to different areas inside the cassette seal, whichenables better heat dispersion, lubricates addtional sealing lips during friction and prevents the entry of external pollutants.
c.Rubber bumpers
Rubber bumpers correctly position the sleeve with the primary sealing lip. They also ensure an appropriate level of restriction or interference using various additional barriers, and reduce the entry of external pollutants into the system.
d.Primary sealing lip
The primary sealing lip is pre-stressed by a spring, which guarantees optimal sealing against media when in rotation, whilst compensating for potential shaft run-out and eccentricity faulis. The sealing lip’s optimised geometries ensure reduced friction and longer product lifespan.
e.Metal/rubber inside diameter
The cassette seal’s inside diameter interior is designed to offer better static sealing against low-or high-viscosity fluids, and reduce installation effort during assembly.
f.Curved metal part
The curved metal cage on the outside of the cassette seal allows for easy assembly and disassembly, and prevents the seal from coming apart during transport or maintenance operations.
g.Xihu (West Lake) Dis.ctless barrier
The rubber baffle is a contactless barrier that limits the entry of external pollutants.
h.Additional anti-pollution sealing lips
Additional sealing lips can be radial or axial, depending on the cassette seal profiles and additional barriers against external pollutants.
i.Ground metal cage
The metal part of the cage that is in contact with the sealing lip(s) is ground in order to improve surface toughness, reduce friction and increase the seal’s lifespan.
 

NO.	OEM	SIZE	NO.	OEM	SIZE
1	12015223B	25*52*12	26	12017098B	127*160*15.5/17.5
2	57133115B	25*52*11.5/18	27	12016448B	130*160*14.5/16
3	12017571B	35*60*13/14.5	28	12019619B	136.8*165*13
4		35*62*13.5/14	29	12016688B	140*170*14.5/16
5	12019775B	35*65*14.5/17	30		142*170*13.5/16
6	12014654B	35*92/98*13/27	31	12571496B	142*170*15/16
7	12571571B	37*85*15/15.5	32	12019116B	145*175*14.5/15.5
8	12015392B	45*70*14/17	33		148*170*14
9		47*75*16.5/17.5	34	12013126B	150*176*15.5/16
10	12571351B	48*75*14/17	35	12018035B	150*180*14.5/16
11	12018678B	53.2*78*13/14	36	12018750B	150.15*178*13/16
12	12016792B	55*80*12.5/14	37	12014852B	155*190*17.5/19
13	12018036B	56*80*13/14.5	38	12016391B	155*195*16.5/18
14	12019512b	60*90*14/16.3	39		160*191.5*16.5
15	12015928B	65*90*13/14.5	40	12019930B	165*190*15.5/16.5
16	12018849B	65*92*10/15	41	12015149B	165*195*16.5/18
17	12018338B	70*95*13/14.5	42	57127784B	167.8*198*13/14.5
18	12571817B	70*100*12.5/16	43	12019084B	170*200*15/16
19	12019120B	75*100*13/14.5	44	12018107B	178*208*16/18
20	12017293B	85*110*13/14.5	45	1257108B	189.8*230*15.5/17
21	12014492B	110*140*14.5/16	46	12016896B	190*215*15.5/17
22	12017210B	111*146*13.5/14.5	47	12015136B	190*220*16/18
23	12019553B	120*150*14/15.5	48	12019114B	210*240*16/18
24	12018572B	120*160*15.5/17	49	1257144B	220*265*19/21
25	57125740B	121.8*150*13/15	50	12019336B	235*270*20/22

FAQ
1:Why more and more customers choose S&P rubber seal?

• We are specialized in the manufacturing and exporting of high quality seals.  Choose us is to choose the rest assured.
• We mainly produces various types, specifications, models of the seals of high precision mechanical components.  We have all the specifications of what you need to help you achieve one-stop shopping, save time, effort and worry.
• We has long been a domestic and international numerous oil seal CZPT supply business of manufacturer, service for 15 years, we have professional talents and product research and development equipment, our research and development ability, is the domestic first-class oil seal manufacturer home.
• We provide one-stop sealing solutions, and provide a full range of services, from product design, mold development, stamping skeleton, vulcanization molding, clip, screening and packaging,. The entire process would take a shorter, more stable quality.

2: What is your packing?

• Paper roller: 10pcs in one roller, 200 rollers in one carton
• PP bag:     50 or 100pcs in one bag,15 or 30 bags in one carton
• Box:        1pcto a box
• According to customer’s request. 
  3:Date of Delivery
• 1-2 days if goods in stock.
• 10-15 days if goods out of stock with molding.
• 25-30 days if goods out of stock without molding.

4:Payment Term:

• 30% T/T in advance and 70% balance paid before shipment.
• West union
• Paypal
• others for discussion

5: Can you produce according to the samples?

• We have our own brand of DEMAISI.
• We accept ODM and OEM at the same time.We have the ability to provide the sample of the products of decomposition, develop the mould, for production.

6: How do you make our business long-term and good relationship?

• We will continue to improve the process control, and improve the quality of our products and work to reduce operating costs and provide a competitive price for customers, to ensure that customers benefit
• We seriously treat every customer, in good faith with them to do business, make friends, no matter how much volume, we will provide a full range of services, one-stop sealed solution.

Analytical Approaches to Estimating Contact Pressures in Spline Couplings

A spline coupling is a type of mechanical connection between 2 rotating shafts. It consists of 2 parts – a coupler and a coupling. Both parts have teeth which engage and transfer loads. However, spline couplings are typically over-dimensioned, which makes them susceptible to fatigue and static behavior. Wear phenomena can also cause the coupling to fail. For this reason, proper spline coupling design is essential for achieving optimum performance.

Modeling a spline coupling

Spline couplings are becoming increasingly popular in the aerospace industry, but they operate in a slightly misaligned state, causing both vibrations and damage to the contact surfaces. To solve this problem, this article offers analytical approaches for estimating the contact pressures in a spline coupling. Specifically, this article compares analytical approaches with pure numerical approaches to demonstrate the benefits of an analytical approach.
To model a spline coupling, first you create the knowledge base for the spline coupling. The knowledge base includes a large number of possible specification values, which are related to each other. If you modify 1 specification, it may lead to a warning for violating another. To make the design valid, you must create a spline coupling model that meets the specified specification values.
After you have modeled the geometry, you must enter the contact pressures of the 2 spline couplings. Then, you need to determine the position of the pitch circle of the spline. In Figure 2, the centre of the male coupling is superposed to that of the female spline. Then, you need to make sure that the alignment meshing distance of the 2 splines is the same.
Once you have the data you need to create a spline coupling model, you can begin by entering the specifications for the interface design. Once you have this data, you need to choose whether to optimize the internal spline or the external spline. You’ll also need to specify the tooth friction coefficient, which is used to determine the stresses in the spline coupling model 20. You should also enter the pilot clearance, which is the clearance between the tip 186 of a tooth 32 on 1 spline and the feature on the mating spline.
After you have entered the desired specifications for the external spline, you can enter the parameters for the internal spline. For example, you can enter the outer diameter limit 154 of the major snap 54 and the minor snap 56 of the internal spline. The values of these parameters are displayed in color-coded boxes on the Spline Inputs and Configuration GUI screen 80. Once the parameters are entered, you’ll be presented with a geometric representation of the spline coupling model 20.

Creating a spline coupling model 20

The spline coupling model 20 is created by a product model software program 10. The software validates the spline coupling model against a knowledge base of configuration-dependent specification constraints and relationships. This report is then input to the ANSYS stress analyzer program. It lists the spline coupling model 20’s geometric configurations and specification values for each feature. The spline coupling model 20 is automatically recreated every time the configuration or performance specifications of the spline coupling model 20 are modified.
The spline coupling model 20 can be configured using the product model software program 10. A user specifies the axial length of the spline stack, which may be zero, or a fixed length. The user also enters a radial mating face 148, if any, and selects a pilot clearance specification value of 14.5 degrees or 30 degrees.
A user can then use the mouse 110 to modify the spline coupling model 20. The spline coupling knowledge base contains a large number of possible specification values and the spline coupling design rule. If the user tries to change a spline coupling model, the model will show a warning about a violation of another specification. In some cases, the modification may invalidate the design.
In the spline coupling model 20, the user enters additional performance requirement specifications. The user chooses the locations where maximum torque is transferred for the internal and external splines 38 and 40. The maximum torque transfer location is determined by the attachment configuration of the hardware to the shafts. Once this is selected, the user can click “Next” to save the model. A preview of the spline coupling model 20 is displayed.
The model 20 is a representation of a spline coupling. The spline specifications are entered in the order and arrangement as specified on the spline coupling model 20 GUI screen. Once the spline coupling specifications are entered, the product model software program 10 will incorporate them into the spline coupling model 20. This is the last step in spline coupling model creation.

Analysing a spline coupling model 20

An analysis of a spline coupling model consists of inputting its configuration and performance specifications. These specifications may be generated from another computer program. The product model software program 10 then uses its internal knowledge base of configuration dependent specification relationships and constraints to create a valid three-dimensional parametric model 20. This model contains information describing the number and types of spline teeth 32, snaps 34, and shoulder 36.
When you are analysing a spline coupling, the software program 10 will include default values for various specifications. The spline coupling model 20 comprises an internal spline 38 and an external spline 40. Each of the splines includes its own set of parameters, such as its depth, width, length, and radii. The external spline 40 will also contain its own set of parameters, such as its orientation.
Upon selecting these parameters, the software program will perform various analyses on the spline coupling model 20. The software program 10 calculates the nominal and maximal tooth bearing stresses and fatigue life of a spline coupling. It will also determine the difference in torsional windup between an internal and an external spline. The output file from the analysis will be a report file containing model configuration and specification data. The output file may also be used by other computer programs for further analysis.
Once these parameters are set, the user enters the design criteria for the spline coupling model 20. In this step, the user specifies the locations of maximum torque transfer for both the external and internal spline 38. The maximum torque transfer location depends on the configuration of the hardware attached to the shafts. The user may enter up to 4 different performance requirement specifications for each spline.
The results of the analysis show that there are 2 phases of spline coupling. The first phase shows a large increase in stress and vibration. The second phase shows a decline in both stress and vibration levels. The third stage shows a constant meshing force between 300N and 320N. This behavior continues for a longer period of time, until the final stage engages with the surface.

Misalignment of a spline coupling

A study aimed to investigate the position of the resultant contact force in a spline coupling engaging teeth under a steady torque and rotating misalignment. The study used numerical methods based on Finite Element Method (FEM) models. It produced numerical results for nominal conditions and parallel offset misalignment. The study considered 2 levels of misalignment – 0.02 mm and 0.08 mm – with different loading levels.
The results showed that the misalignment between the splines and rotors causes a change in the meshing force of the spline-rotor coupling system. Its dynamics is governed by the meshing force of splines. The meshing force of a misaligned spline coupling is related to the rotor-spline coupling system parameters, the transmitting torque, and the dynamic vibration displacement.
Despite the lack of precise measurements, the misalignment of splines is a common problem. This problem is compounded by the fact that splines usually feature backlash. This backlash is the result of the misaligned spline. The authors analyzed several splines, varying pitch diameters, and length/diameter ratios.
A spline coupling is a two-dimensional mechanical system, which has positive backlash. The spline coupling is comprised of a hub and shaft, and has tip-to-root clearances that are larger than the backlash. A form-clearance is sufficient to prevent tip-to-root fillet contact. The torque on the splines is transmitted via friction.
When a spline coupling is misaligned, a torque-biased thrust force is generated. In such a situation, the force can exceed the torque, causing the component to lose its alignment. The two-way transmission of torque and thrust is modeled analytically in the present study. The analytical approach provides solutions that can be integrated into the design process. So, the next time you are faced with a misaligned spline coupling problem, make sure to use an analytical approach!
In this study, the spline coupling is analyzed under nominal conditions without a parallel offset misalignment. The stiffness values obtained are the percentage difference between the nominal pitch diameter and load application diameter. Moreover, the maximum percentage difference in the measured pitch diameter is 1.60% under a torque of 5000 N*m. The other parameter, the pitch angle, is taken into consideration in the calculation.