1. DWR
DAWOORI CO.,LTD.
RIVET
SUPER FINISHING STONE

2. DWR Contents History Rivet - Why DWR Rivet? - Rivet's drawing
- Sample picture of Rivet
- Rivet Manufacturing Process of Rivet
Super Finishing Stone
- DWR Super Finishing Stone
- Super Finishing Stone's Drawing
- Specifications Questionnaire Of Super Finishing Stone's
- Specifications Of Super Finishing Stone
- Manufacturing process Of Super Finishing Stone
4. Quality And Environmental Certification
5. Contact Us

3. DWR History Jul.1984. Established Sejin Machinery
Import Rivets, Super stone, Diamond grinding wheel dresser
Jul Founded Taesung Industry
Established Rivet manufacture factory, started localizing rivet
Jun Increased rivet machine
Succeeded localization of ingredients
Jun Succeeded rivet machine localization
Dec Merged Taesung Industry and Sejin Machine
Jan Changed name to DAWOORI
Mar Succeeded Honing Stone localization
May Acquired ISO 9001 certification
Jul Exported to SKF France
Apr Added 81 rivet machine
Aug Acquired ISO certification
Oct Succeeded Super stone localization
Jan Delivered Super stone WX4000 to FAG Changwon Factory
May Delivered Super stone WG3000 to FAG Jeonju Factory

4. DWR Jun.2003. Delivered Super stone WG6000 to FAG Changwon Factory
Added riveting machine equipment's (total 104)
Annual production of rivets 350/ton
Exported rivets to Japanese TODO (China)
Exported Super stone to FAG (India)
Added 8 rivet machine facilities (total 112)
Dawoori Factory's expansion
Exported rivets to ORS (Turkey)

5. DWR
RIVET

6. DWR
Why DWR Rivet?
DWR rivets are the best quality product in terms of material, appearance and dimensions by strict material control and precision manufacturing management.
We can supply our customer with DWR rivets, made out of automotive equipment and stable material, provide with competitive price.
DWR rivets comply with 100% deadline for customer.
The customer is provided free of charge upon request DWR rivet's Sample.
DWR rivets have been recognized as a good quality product and exported to foreign companies such as SKF, TODO, ORS, etc.
The research and development to improve the quality of DWR rivets are always ongoing in Research Institute.
DWR rivets are a high quality with reasonable price than rivets of other offshore industry.
DWR rivets respond immediately to the needs of professional customers, based on the long-accumulated technology and are committed to customer satisfaction.

7. DWR Rivet's drawing * 70 kinds of production.규격 D1 D2 D3 DH H R I L L1 L2 L3
1.00x2.4
1.00
0.90
0.60
1.40
0.50
0.70
0.25
2.40
1.05
1.18x2.6
1.18
1.08
0.80
1.80
2.60
1.18x2.8
2.80
1.15
1.41x3.2
1.41
1.31
2.00
3.20
1.35
1.6x3.75
1.60
1.46
1.20
0.65
1.30
3.75
2.30
0.40
1.6x4.15
4.15
2.50
1.6x4.55
4.55
2.70
1.95x4.45
1.95
1.82
1.50
4.45
2.28x5.35
2.28
2.14
1.94
3.70
1.85
5.35
3.10
2.58x6.25
2.58
2.45
2.15
4.20
2.10
6.25
3.80
1.00x0.90x2.35
2.35
0.45
1.25
1.00x0.90x2.80
0.85
1.18x1.08x2.60
0.55
1.19x1.08x3.10
1.19
0.88
1.90
0.95
1.41x1.31x3.65
3.65
1.55
1.42x1.31x3.20
1.42
1.61x1.46x4.35
1.61
1.10
4.35
2.25
1.96x1.82x4.65
1.96
4.65
2.55
1.96x1.82x5.10
5.10
2.58x2.45x6.25
2.91x2.76x6.70
2.91
2.76
2.41
4.70
6.70
4.05
3.15x3.00x7.29
3.15
3.00
2.54
7.29
4.19
* 70 kinds of production.
  * All products can be manufactured to order.

8. DWR
Sample picture of Rivet

9. Raw material inspection
DWR
Manufacturing Process of Rivet 1
Raw material inspection
Before stocking the raw materials, carry on appearance, diameter, and hardness check
Form
Appearance, item test often carried on for quality management
Screening
A primary and a secondary screening
Managing the nonconforming accurately
Surface treatment
With oil and sawdust barrel
Increasing the roughness and corrosion features

10. Deiling,anti-rust,drying
DWR
Manufacturing Process of Rivet 2
Cleaning
Removing debris
Maintaining cleanliness
Deiling,anti-rust,drying
After removal of the rivet's oil, deposition in anti-rust oil,
Enhancing anti-rust function by drying
Packaging
With vacuum nitrogen packaging
Completely blocking the oxygen and the rivets
Inspection
All requirement check by a three-dimensional measuring instrument
Strict quality control

11. DWR
Super Finishing Stone

12. DWR DWR Super Finishing Stone
Super Finishing Stone is used for the final finishing product to make a very high
quality product. Stone are generally produced tailored (shape, size) according to customer requirements.
Artificial abrasive material #1000 to #8000 is used for product for Bearing.
The abrasive grains is used by the state of the Japanese company F. F's grains are excellent and reliable products that Dawoori as well as several leading companies use. (import WA, GC, CA, A)
The following products are used with the Super Finishing Stone.
Super Finishing Stone is used to finish Taper Bearing, Taper Roller Bearing, Ball Bearing. (IR & OR)
Finishing of the hydraulic cylinder and piston
Mold Making
Mold making is used in a number of products according to the bearing shaft of the rotary compressor and the pump and other needs.

13. DWR Dawoori's Super Finishing Stone High workability Long life
Dawoori Succeeded development of Super Finishing Stone in 2002 and supplies it to the leading bearing company. Keep working on the sustainable development and let customer suggest the best product for the products quality specifications and the customized products if needed.
Try to complete the Super Finishing Stone for better performance through stringent verification by the Stone Test Machine.
Dawoori's Super Finishing Stone
High workability
Long life
Good quality
Cost reduction
We will be the best partner, doing the best to produce better quality products to meet the customer's need

14. DWR
Super Finishing Stone's Drawing
Approved drawing

15. DWR
Specifications Questionnaire Of Super Finishing Stone's

16. DWR
Specifications Of Super Finishing Stone

17. DWR Specifications Of Super Finishing Stone 1
The first bond of Dawoori 2
The second bond of Dawoori 3
Picture of the third bond of Dawoori
The bond acts as a skeleton which binds the abrasive grain, pore and
different types of grinding wheel materials.
Characteristics of the product of 1,2 and 3 bonds can be changed
in accordance with the ratio.
Therefore, we strictly control in accordance with the self-regulation of the production control of bond 4
Picture of pore system
The roles of pore system are heat generation in the grinding process by securing a space between the abrasive grain and bond and preventing development of eyes dream of wheel and creating the surface of good quality.
Dawoori imports pore system from Japanese Company S.

18. DWR Manufacturing process Of Super Finishing Stone1 Formulation
Stone raw materials formulations of various kinds of stone
The process of blending the precise amount of time and amount
Naturally drying
Pouring the frame after completion
of formulations
Periodically drying
Completely drying
Dryer more than 50 ℃
Drying for 10 to 15days
Removing air
Using a vacuum machine
Removing air in the product

19. Cutting and processing
DWR
Manufacturing process Of Super Finishing Stone2
Heat Treatment
In dried grinding wheel block in electric furnace. Annealing to the precise temperature control
(between 900℃ to 1500℃)
Hardness
Precisely measured by durometer
Used only qualified product
Surface treatment
According to the drawings of the finished
product
The surface treatment with sulfur or wax
Cutting and processing
Drawings in accordance with customer
requirements
Precisely cutting and processing

20. DWR
Quality And Environmental Certification

21. DWR Dawoori Co., Ltd. Contact Us 723-60,Geolmi-ro, Juksan-myeon
Anseong-si, Gyeonggi-do
KOREA
Tel ~4
Fax .