1. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 –
6340(Print), ISSN 0976 – 6359(Online) Volume 4, Issue 2, March - April (2013) © IAEME
367
DESIGN OF PUNCH AND DIE FOR TAPER ROLLER BEARING
CAGE FOR MULTI POCKETING
Mr. M. V. ARDESHANA1
, Mr. N. L. MEHTA2
1
M.E.[CAD/CAM] Student, Department of Mechanical Engineering, B. H. Gardi College of
Engineering & Technology, Rajkot, Gujarat, India
2
Asst. Prof. Department of Mechanical Engineering, B. H. Gardi College of Engineering &
Technology, Rajkot, Gujarat, India
ABSTRACT
Taper roller bearing is widely used in the different industries. So there is need to
demand for the taper roller bearing. It has four components outer race, inner race cage and
roller. The main function of Cage is to maintain rolling element at a uniform pitch, so load is
never applied directly to the cage. Cage is manufactured by three ways pressed cage, machine
cage, and molded cage. But mostly cage is manufactured by power press. In manufacturing of
cage pocketing operation is required as per the number of pockets. In existing situation single
pocket is produced in a single stroke of power press. So it has to go for the number of stroke
as equal to number of pocket so production time is more for cage manufacturing. In proposed
method of manufacturing for cage multi pocketing is performed in a single stroke of power
press. Due to that production time for cage is reduced and productivity is increased.
Keywords: Cage, Die, Multi Pocketing, Punch, Taper Roller Bearing
1. INTRODUCTION
The main function of the roller bearing cage is to avoid direct contact between the
rolling elements. At the roller bearings, the cage realizes also the guidance of rollers and at
the roller bearings with separable rings the cage retains the rolling elements. [1]
Cages function to maintain rolling elements at a uniform pitch so load is never applied
directly to the cage and to prevent the rolling elements from falling out when handling the
bearing.
INTERNATIONAL JOURNAL OF MECHANICAL ENGINEERING
AND TECHNOLOGY (IJMET)
ISSN 0976 – 6340 (Print)
ISSN 0976 – 6359 (Online)
Volume 4, Issue 2, March - April (2013), pp. 367-372
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2. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 –
6340(Print), ISSN 0976 – 6359(Online) Volume 4, Issue 2, March - April (2013) © IAEME
368
2. EXISTING METHOD OF CAGE MANUFACTURING
Pressed cages are usually made of steel, but sometimes of brass, too. They are lighter
than machined metal cages. [2] Prone type cage and taper roller bearing cage are
manufactured by power press operation.
Machined cages of metal and textile laminated phenolic resin are made from tubes of
steel, light metal or textile laminated phenolic resin, or cast brass rings. Machined cages are
also used where lip guidance of the cage is required. Riveted cage and Prong cage are
manufactured by Machine operation.
Moulded cages of polyamide are produced by injection moulding and are used in
many large-series bearings. Injection moulding has made it possible to realize cage designs
with an especially high load carrying capacity. Angular contact ball bearing cage are
manufactured by Moulding operation.
Cage Drawing:
Fig.1. TRB Cage 32211
This is the Cage drawing as shown in Fig. In Existing Situation cage is manufactured
by Power press. In this cage total no. of pocket is 19. Right now single pocket required single
stroke of press so 19 pockets requires 19 stroke per a single cage manufacturing. Indexing
mechanism is also required for maintaining proper distance between the two pockets.
Production time for a single cage is more. So productivity is less. Production of cage is 6,
00,000 piece per month in a company. To increase the productivity it has to increase the
production. Therefore it is required to reduce the production time for a single cage
manufacturing. It has to improve the manufacturing process. [2]
3. PROPOSED METHOD OF CAGE MANUFACTURING
In propose method of cage manufacturing all 19 pockets produce in a single stroke of
a power press. So it can also reduce the production time for the cage. [2] And it can also
increase the productivity. Same way there is no need to go for the indexing in cage for
producing a pocket. For making all pocket in a single stroke multi pocketing assembly is
required. Assembly contains the punch, die, punch retainer, centre pin, die plate, retainer ring.

3. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 –
6340(Print), ISSN 0976 – 6359(Online) Volume 4, Issue 2, March - April (2013) © IAEME
369
3.1. Design of punch and die
Here, in this case Blanking Shape is shown in fig.
Figure.2. Blanked shape
P= Perimeter of pocket=57.8 mm, S=Shear strength = 4000 psi= 275.79 N/mm2
T= Thickness of strip = 1.8 mm Force = 28693.19 N (1)
1 tonne =9806.65 N, So, 28693.19 N = 2.9 tone for 1 pocket.
But we have to create 19 pockets in single punching operation. [3]
For 19 pocket = 19 2.9 = 55.1 tone press capacity required.
The clearance is a function of the kind, thickness and temper of the work material,
harder materials requiring larger clearance than soft materials, the exception being
aluminium.
Punch size A1 = 10.95 mm, Punch size A2 = 9.95 mm, Punch height = 18.40 mm
3.2. Design of Die
The minimum thickness of the die block depends upon the strength required to resist
the cutting forces, and it will depend upon the type and thickness of the material being cut.
Die thickness=19 mm for blanking perimeter 75 mm
Die thickness=25 mm for blanking perimeter 75 to 250mm
Die thickness=31 mm for blanking perimeter >250 mm
Or die block thickness can be taken as T= cm, F is in tones.
So, in this case blanking perimeter is 58 mm so die thickness should be 15 mm.
Die size A1 = 11.25 mm, Die size A2 = 10.25 mm, Die Height = 18.70 mm
3.3. Design of Punch Retainer/Holder
The main function of punch retainer is to hold the punch. Punch is rest in the slot of
punch retainer. Punch holder – dimension of the punch holder should be at least 5 mm larger
than the punch. Punch holder thickness 25 to 75mm. Punch retainer thickness is 30 mm in
this die assembly. It has to rest 19 punches so 19 slots available in the punch retainer.
3.4. Design of Retainer Ring
Retainer ring is mounted on the punch retainer. Retainer ring thickness is 25 mm.
above the retainer ring it has to provide the constant pressure by bellow or spring. So all
punches are together with each other.
3.5. Design of center pin
Center pin is fixed with the ram. Center pin is moving inside the punch.So as per
constrain center pin outside diameter is 84 mm and below portion diameter is 46 mm. Height

4. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 –
6340(Print), ISSN 0976 – 6359(Online) Volume 4, Issue 2, March - April (2013) © IAEME
370
of center pin is 80 mm. It has outside taper for the proper mating between the outside of
center pin and inside of punch.
Fig.3. Model of Punch Fig.4. Model of Die
Fig.5. Model of Punch Retainer Fig.6. Model of Die plate
Fig.7. Model of Centre Pin Fig.8. Model of Retainer ring
Fig.9. Multi pocketing Assembly Fig.10. Multi pocketing Assembly
Punch Retainer
Punch
Die Plate
Die
Retainer
Ring
Center
Pin

5. International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 –
6340(Print), ISSN 0976 – 6359(Online) Volume 4, Issue 2, March - April (2013) © IAEME
371
4. ANALYSIS OF PUNCH
Allowable stress = yield strength/ factor of safety
(2)
Factor of safety = 1.5, σ = 2200/1.5 = 1466.66 N/mm2
Static structural analysis of Punch:
Fig.11. Displacement of punch is 0.05 mm Fig.12. Stress analysis of punch
Table.4. Result and Discussion
Sr. No. Allowable stress Von mises stress
1 1466.66 N/ mm2
205 N/mm2
From the above analysis we can get the stress developed in the punch is less than the design
allowable stress so the design is safe design.
5. CONCLUSION
The proposed manufacturing method for cage based on the multi pocketing process.
The result for the analysis indicates the safe design for the punch. Multi pocketing assembly
include the design for punch, die, punch retainer, retainer ring and centre pin. The main
aspect of the multi pocketing is to reduce the production time for the cage but as a by product
it can also increase the productivity.
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[1] Ripanu Marius-lonut,NagitGheroghe, Merticaru Vasile ,Husanu Valerica, Lacob Strugaru
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(XXI)2012,NRI.
[2] FAG Rolling Bearing Cages, Designation, Design, Material, TI Nr. WL 95-4 E August
2000.

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6340(Print), ISSN 0976 – 6359(Online) Volume 4, Issue 2, March - April (2013) © IAEME
372
[3] Vyankatesh B. Emche and Rajesh R Kandalkar, Efficient Method of Producing Oval
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