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www.gold-star-oo.co.jp
GoldStar machining was founded in 2010 and headquartered in Dongguan City, Guangdong Province,
China. We now have nearly 50,00sqm factory floor and more than 170 employees. As a professional
manufacturing factory, we mainly focus on precision parts machining.
The parts we machined are related to various industries including machinery, jig, fixture and tooling
automation, automotive, electronics, medical components. And these parts are shipped globally. Our
company equips advanced imported precision machines and QA inspection instruments to meet global
industry standards. We currently have five factories in Dongguan city, China and have offices in
Dongguan, Hong Kong, Japan and soon to include more.
www.gold-star-oo.co.jp
www.gold-star-oo.co.jp
Milling &Turning machines Turning machines
CNC machines EDM machines
www.gold-star-oo.co.jp
Grinding workshop Inspection workshop
Business department office Process of flowsheet
Our Advance
(1).Direct from factory
(2).Low scrap rate
(3).All kinds of metal and plastic material is available
(4). High Tolerance: +/- 0.002mm
(5). 100% inspection(offer QC report)
(6). Global delivery as fast as 2-3days
(7). One-stop customized service
(8). Quick reaction
(9). From 1 to 500+ parts
(10). Surface finishing as required
www.gold-star-oo.co.jp
Our business
1.Metal precision components 2.Mechanical parts manufacture
3: Plastic precision components 4.Injection molding
5.Jig and fixture tooling 6.Furniture Part
7.Steel parts 8.CNC Precision Milling Part
9.CNC Precision Turning Part 10.Punch
11. Welding& Forging& Bending Part 12.Medical Aluminum Part
13. EDM & Laser cut parts 14: Non standard Mechanical Part
Machining
15.Mechanical Industrial product/ Auto
Part 16. Custom manufacture
17.Mold precision parts 18.Surface treatment
www.gold-star-oo.co.jp
www.gold-star-oo.co.jp
Precision turning parts
www.gold-star-oo.co.jp
www.gold-star-oo.co.jp
CNC machined parts
www.gold-star-oo.co.jp
Non standard Mechanical Part Machining
www.gold-star-oo.co.jp
www.gold-star-oo.co.jp
Welding parts
www.gold-star-oo.co.jp
Precision parts
www.gold-star-oo.co.jp
www.gold-star-oo.co.jp
www.gold-star-oo.co.jp
Case studies
Product name The fixed slider for the bearing
Product description This is a bearing for the fixed slider
Capabilities applied/Processes CNC milling, Deburring
Turning , Chrome plating
Overall part dimensions 50x50x100 (mm)
Tightest tolerances 0.01mm
Material used 345C
Inspection performed Dimensional inspection, visual inspection
Volume 2pcs
Turnaround time 2days
Project;
Our team brought its expertise to the table - with CNC turning and milling,
including facing, outer diameter turning, and a rough and finished bore with a
stepped inner diameter turning. Our skilled machinists performed all of the
countersinking, and tapping. our broad array of capabilities skills allowed us to
make the best machined components possible, with the precision our customers
expect from us.
Our CNC vertical mill was fully employed for this piece. With milling and drilling,
and also mill profiles on the inner diameter, this work was truly fine. And our
countersinking, tapping, and boring milled everything just right. Made of 345c
material and with a chrome plating finish, followed by standard dimensional
inspection.
We delivered 2 pieces to our client's facility in Japan. Let us do the same for you
- contact Goldstar Precision machining today.
Custom CNC Turning Project Highlights
Case studies
Product name Precision insert
Product description There are insets parts for the mold and precision machines.
Capabilities
applied/Processes
CNC milling, CNC,
Heating treatment, Electric discharge
Grinding Wire cutting
Overall part dimensions 0.5-300 (mm)
Tightest tolerances 0.002mm
Material used SKD11,SKD61,SK3,SKH5,SCM
Inspection performed Dimensional inspection, visual inspection
Volume 20pcs
Turnaround time 5ays
Project :
1.Rough Machining
During rough machining the main purpose is to remove as much material in as little time as
possible. The tool steel has not been hardened so that the cutters can take away material
quickly. In this step we are not machining any small details.
2. Heat Treatment (Hardening)
Before we start machining the fine details , we harden the material. Heat treating of tool
steel is a sophisticated metallurgical process using a combination of controlled heating
close to the melting point, case hardening (multiple heating cycles at reduced temperatures),
quenching in an oil bath, and cryogenic hardening using liquid nitrogen. Afterwards the
material looks a bit rough . Now that hardening is done we can move on to Grinding and
CNC machining.
3.Fine Machining
After rough machining, heat treatment and Grinding, the parts will be transferred to the next
CNC machining center for fine machining, using complex computer programming and
modern cutting tools to get fine details. Once the machining is done, the tool steel needs to
be EDM.
4.Electric Discharge Machining (EDM)
The parts required extensive use of EDM. Electrodes for the EDM machine are custom
made for those components. In this case, EDM allows for more precise corner radii than
CNC machining. Next step we need to do wire cutting for the details.
5.It is then thoroughly inspected to the customer’s specification before shipped to customer.
Custom CNC Milling & Turning& CNC Machining Project Highlights
Custom CNC Milling Project Highlights
Product name Cover
Product description This is a mechanical seal cover for the fixed
connection.
Capabilities
applied/Processes
CNC milling, Deburring
Tunring , Chrome plating
Wire cutting,
Overall part dimensions
Tightest tolerances 0.005mm
Material used SUS304
Inspection performed Dimensional inspection, visual inspection
Volume 100pcs
Turnaround time 12days
• Project:
• The parts are made using CNC milling, turning and wire cutting processes.
All the parts were finished with chrome plating.
• The parts were produced in 12days ,shipping is done by air.
• Goldstar Precision Machining produced 100 of these precision CNC milled,
SUS304 covers for a machine . The precision CNC turning,milling, included:
drilling, tapping, and counter boring, which provided the precise
requirements for parts. The Goldstar Precision machining team put its
experience to work - our customer provided the print and 2D CAD drawings,
and we took it from there, using our CNC mill to make the cover they
needed, with quality they expected.
• Let Goldstar Precision Machining provide your CNC milling solutions -
contact us today.
Case studies
Case studies
Project:
Japanese’s leading machine manufacture, places an order for a new designed
machinery. It is turned around in just 2days by GOLDSTAR machining. 100%
inspection before shipment
Goldstar machining uses a CNC milling and grinding for this particular part.
The flexibility of this lathe is such that can be used with a wide range of
materials, including aluminum, steel, stainless steel, titanium, copper, brass
and plastic. The parts were finished with chrome plating.
Let Goldstar machining provide your CNC milling solutions - contact us today
Product name Fixed seat
Product description This fixed seat is used in machinery
Capabilities applied/Processes CNC milling, Deburring
Grinding , Chrome plating
Drilling,
Overall part dimensions 55x40x30(mm)
Tightest tolerances 0.005mm
Material used 345C
Inspection performed Dimensional inspection, visual inspection
Volume 6pcs
Turnaround time 2days
Custom CNC Milling Project Highlights
Gold star machining has a wide variety of
precision measuring equipment available for
every industrial measuring need. Every part is
hand-checked for accuracy. The quality
assurance department is separate from the
manufacturing department, it is the
responsibility to support and assist the
manufactory department in defect-free parts.
www.gold-star-oo.co.jp
materials → IQC test-Raw materials → Production → The operator self inspection
→ IPQC test-Process → QA test-Finished product → OQA test-Before shipment
www.gold-star-oo.co.jp
We will attend the exhibition held in US FEBTECH from 11/9-11/12/2015, Booth at: S 5484
In 2016 we will attend German Hannover messe come off in 4/25-4/29
And other 4 exhibitions are booking with fair…..
www.gold-star-oo.co.jp
In the past 5 years we have made great progress in Japan market.
This year we have $300,000 on marketing explore. Now we put our effort on European and
America country market.
The first plant of Gold star have significant with the round parts, as a contract
manufacture, we produce a wide range of parts of varying size and shape.
The Second plant are good at the round parts, eccentric features parts.
The Third plant excel at the precision CNC machining and the CNC milling parts.
The Sixth plant have the ability to produce shapes like squares, hexes, ellipses, cam
profiles, and eccentric features on both the OD and ID of a part, especially for the
precision parts.
The Headquarter can take nearly any form parts. It requires creativity and ingenuity on
the part of the machinist.
www.gold-star-oo.co.jp
Today, Goldstar employs over 170 people at its five plants all in close proximity in Changan town
in Dongguan city, China. One plant mainly manufacturing turning parts, one plant mainly
manufacturing milling components, other three plants specialize in precision CNC machining,
turning, milling, EDM, wire cutting, Grinding, TIG welding, having the ability to produce shapes
like squares, hexes, ellipses, cam profiles, and eccentric features on both the OD and ID of a part,
especially for the precision parts.
No. Equipment Name Range Headquarter Branch No1 Factory 2 Factory 3
Factory 5
Factory 6
Total sets
1 CNC machine
Fanuc Brand
500*400*300
(mm)
2 2sets
2 CNC machine
Markino Brand
850*500*500
(mm)
1 1set
3 CNC machine 850*500*500
(mm)
2 2 2 4 10 sets
4 CNC Gantry
milling
1600*700*700
(mm)
1 1set
5 EDM Sodick brand 2 2sets
6 EDM Taiwan
brand
2 2ses
7 CNC automatic
lathe machine
Ф300*150 2 1 3sets
8 Manual lathe
machines
Ф300*600
7 1 8sets
9 Manual milling
machine
700*350*400
(mm)
13 13 7 9 12 7 61sets
10 Wire cutting
machine
600*400*250 3 3 3 3 4 2 18sets
11 MS-WEDM Sodick
brand
2 2sets
12 MS-WEDM
Taiwan brand
2 2sets
13 Surface grinder 400*250*150 3 1 1 1 4 15 25sets
14 Large size surface
grinder
800*400*350 1 1 1 1 4sets
15 Welding machine 2 2sets www.gold-star-oo.co.jp
Main Equipment List
No. FINISHING Japanese 中文 FINISHING Japanese 中文
1 Hard Chrome ハードクロムメッキ 硬铬 14 Black PTEE テフロン(黒) 铁氟龙-黑色
2 White Chrome クロムメッキ(白)/
白あげ
白铬 15 Brushing ヘアライン 拉丝
3 Black Chrome クロメート 黑铬 16 Hatching knurling アヤメロレット 网纹滚花
4 Nickel Plating ニッケルメッキ 镀镍 17 Plain knurling 平目ロレット 平纹滚花
5 Electrolytic Nickel
Plating
無電解ニッケルメッキ 沉镍 18 Nitrided タフトライト 氮化
6 White Zinc ユニクロメッキ(白) 白锌 19 Gas nitriding イソナイト 气体氮化
7 Blue Zinc-Plated ユニクロメッキ(青) 蓝锌 20 High-frequency heat
treatment
高周波焼入れ 高频热处理
8 Black Zinc-Plated ユニクロメッキ(黒) 黑锌 21 Sand Blasting ラスト 喷砂
9 Black Oxide coating 黒染め 发黑 22 Tempering 焼き戻し 回火
10 Hard anode oxidation 硬質アルマイト 硬质氧化
23 Quenching 焼入れ 淬火
11 Clear anodize アルマイト 氧化本色
24 Annealing アニーリング
退火
12 Black oxidation アルマイト(黒) 氧化黑 25 Polishing 研磨 抛光
13 Green PTEE テフロン(緑) 铁氟龙-
绿色
Passivation パッシベーション
钝化
www.gold-star-oo.co.jp
No.n Name Specification (mm) Tolerance Set Maker
1 Rockwell Hard meter
Leeb hard meter 洛氏硬度计里氏硬度计
0-100 0.5 1
1
Made in China
2 High Gauge meter 高度仪 0-400 0.001 1 TESA
3 High Gauge meter 高度仪 0-700 0.001 5 TESA
4 Two dimensional
inspection equipment
二次元检测 0-400 0.001 1 Made in China
5 Concentric measuring
instrument 同心度检测仪
1 Mitutoyo
6 digimatic depth gage 数显深度尺 0-25 0.01 1 Mitutoyo
7 inside micrometer 内径千分尺 50-100 0.001 1 Mitutoyo
8 blade micrometer 叶片千分尺 0-25 0.01 1 Mitutoyo
9
inner diameter
measuring instrument
三点式内径测量仪
6-12 0.001 1 Mitutoyo
10 12-20 0.001 1 Mitutoyo
11 20-50 0.001 1 Mitutoyo
12
Digital display center
distance instrument
数显中心距
0-150 0.01 1 Mitutoyo
13 0-200 0.01 2 Mitutoyo
14 0-300 0.01 1 Mitutoyo
15
Digital caliper
数显卡尺
0-150 0.01 1set for each QC and Mechanic Mitutoyo
16 0-200 0.01 1set for each QC and Mechanic Mitutoyo
17 0-300 0.01 1set for each QC and Mechanic Mitutoyo
18
Micrometer
千分尺
0-25 0.001 3 Mitutoyo
19 25-50 0.001 1 Mitutoyo
20 50-75 0.001 1 Mitutoyo
21 75-100 0.001 1 Mitutoyo
22 Altimeter 高度计 0-50 0.001 1 Mitutoyo
23 Also including plug gauge, thread gauge, ring gauge, dial gage, roughness samples and all kind of the calipers and micrometers are not shown in the above list.
24
25
26
www.gold-star-oo.co.jp
Industries served: environmental control, aircraft, automotive, medical, machine tool, steel, and food processing.
Materials: Metal and plastic material
Facility: Parts are manufactured on well-maintained, high-accuracy machines.
Quantities: from 1 to 500+parts
Quality Control: 100% inspection before shipment. It is an integral part of production, our gage lab includes both conventional and digital instrumentation. Hardness testing, contour tracing.
www.gold-star-oo.co.jp
Factory and Office Address in China: Goldstar machining Co.,ltd No.4,Shangzhen Rd.,1st,Shangjiao Industrial Park, Changan Town, Dongguan City, Guangdong Province, China. Guangdong Province 523878, People’s Republic of China
Contact: E-mail: [email protected]
Phone: +86 769 8162 7193 Fax: +86 769 8162 7192
Mobile:+86 188 9871 8105
Skype: Jocelyn-cai
Website: www.goldstar-machining.com
www.gold-star-oo.co.jp
www.gold-star-oo.co.jp