Always providing our customers with what they need, when they need it.

We offer solutions for our customers’ various needs

using our complete production system, including ring

forging, heat treatment, turning, quenching and

tempering, grinding and assembly.

In addition, TANRAY continues to strive every day

and push the envelope toward being an

environmentally-friendly forging manufacturer.

People working to learn and discover.hatara-ku

People working to develop their abilities.hatara-ku

hatara-kuPeople working to be proactive.

（Listed in no particular order）

Society is currently changing every day due to globalization. As a result, the various needs of people and organizations continuously change and evolve as well.However, regardless of how the current period continues to change, we, TANRAY, strive to be our customer’ s preferred company by expressing our appreciation and being proactive, positive and flexible. In addition, we ensure that we stay focused by manufacturing and developing products and always pursuing a “new added-value” for our products. We continue to push the envelope every day in order to be a “company that is an essential part for the customer’ s solution.” We thank you for your support.

President Naoyuki Takahashi

September 1917

December 1983

May 2004

October 2010

January 2011

June 2012

Striving to be our customer’s preferred company.

Our corporate name was changed to TANRAY, which combines the words “TANZOU” (forging) and “RAY” (light that is emitted during the forging process). In addition, our logo is a forging ring on top and an anvil (seat for a press) on bottom. It refers to very accurately forged rings made from the precision of an anvil.

■Company name■Head office factory 　 　　　　　　

■The 2nd factory 　 　　　　　　

■Capital　■Total number of employee

■Main customer　

■Suppliers　 　　　　　　　

Working to be an essential part for the customer’s solution.Working to be an essential part for the customer’s solution.

NSK.,co.ltdNTN corporationNippon Thompson co.,LtdNachi-Fujikoshi.corpSumitomo CorporationTaiyoshoji Co., LtdNakatani CorporationNSK.,co.ltdNTN corporationNachi-Fujikoshi.corpUsui Kozai Co., Ltd.Nozaki Chugoro Shoten Co., Ltd.

TANRAY Co., Ltd.950-3313104-1, Otakou, Kita-ku Niigata-shi, Niigata,950-3313, JapanTEL:+81-25-387-1050 FAX:+81-25-387-1053 957-00821794-3, Sasaki, Shibata-shi, Niigata, 957-0082, Japan TEL:+81-254-27-1157 FAX:+81-254-20-771230 million Yen280

Founded

Forging department breaks off and Isobe Kogyo is tablished.

Changed trade name to TANRAY KOGYO.

Expanded facilities and added 2nd factory.

Began partnership with Sumitomo Corporation.

Completed 2nd forging factory / cutting factory and 3rd heat treatment factory.

History

Corporate name and logo

Outline

―　２　―

■Ring for bearing ■Construction machine/Construction ring ■Ring for gearbox of automobile etc　■Ring for retainer (For motor） ■Marine valve■Bearings for robots■Other types of rings

M a i n p r o d u c t

Breathing life to materials for customers.

■bearing steel

■Stainless steel・Heat-resistant steel / Superalloys

■ Carbon steel / alloy steel for machine parts

■ Tool steel / Hollow drill steel

■Other Steel

High carbon chromium bearing steel

Stainless steel rods

Heat-resistant steel rods

Nickel and nickel alloy casting

Carbon steel for machine parts

Structural steel with guaranteed hardenability

Alloy tool steel

Rolled steel bar for building structures

Rolled steel for general structures

Rolled steel for welded structures

Other

SUJ2・SUJ3

SUS303 ・ SUS304 ・ SUS304L ・ SUS316 ・ SUS316L

SUS403 ・ SUS440C

SUH660 ・ SUH3

NMC426

S10C ～ S55C

SCM415H ・ SCM420H ・ SCM435H ・ SCM440H ・SCR420H

SNCM220H ・ SNCM420H・ STKM13A・4320H・8620Ｈ

SKD61・SKD4

SNR490B

SS400

SM490A

NSR-1・ VC1 ・HNCM-1・SAC-1・SAE9315

SAC2M・C1020・Chrome-cobalt・A5052・A5056

Category Steel type

Forging 3,500 t (430,000piece)

Machining Process

Annealing

Cutting for bearing (Called tsuttkiri)

Quenching /Tempering

End / outer grinding

Inner grinding

170,000 pieces

2,000 t

20,000 cut

60,000 pieces

100,000 pieces

50,000 pieces

etc

―　３　―

Grinding

Monthly Product Capaci ty

U s e d m a t e r i a l

Providing reliability for the customer.

100

150

200

250

300

350

400

450

500

600

800

900

1000

2 5 7 10 15 20 25 30 35 40 60 8050 70 90 100

Outer diameter（mm）

Product weight (kg)

●6300 t press: Ultra-large type lineProduct width: 80-240 mm

●2500 t press: Extra-large type lineProduct width: 50-140 mm

●1600 t press: Large type lineProduct width: 40-125ｍｍ

●1600 t press: Medium type lineProduct width: 40-100ｍｍ

●1600 t press ×2: Small type lineProduct width: 40-80ｍｍ

Ring manufacturing with a minimum outer diameter of 100 mm to a maximum outer diameter of 1000 mm

※Manufacturing range based on SUJ and SC materials, etc. Note, the manufacturing weight varies for special steel (SUS, etc.).

Manufacturing range of forged ring products

Main Facility

Billet Shear 600tBand Saw Model400Circular Saw Type Cutting Machine model 150・200Induction heating furnace

2 unit

1 unit

1 unit2 unit

■Cutting Facility

■Ring Forging Facility6300t Crank Press

Hot Rolling Mill

Extra Large Size

Super Large Size 2500t Crank PressHot Rolling Mill

Large Size 1600t Crank Press

Hot Rolling Mill

Middle Size 1600t Crank Press

Hot Rolling MillSmall Size 1600t Crank Press

Hot Rolling Mill■Heat treatment FacilityCarrier type spheroidizing furnace

Hardening furnace＋Tempering furnace

Induction heating furnace

■Shotblasting FacilityHoisted Type of Shotblasting

■Tuttkiri(Cutting) FacilityBand Saw Type Ring Cutting Machine

Circular Saw Type Ring Cutting Machine

■Lathe FacilityＮＣ compound lathe　The largest processing diameter 380mm

ＮＣ compound lathe The largest processing diameter 260mm

ＭＣ 630×630

5 stem control compound lathe （The largest processing diameter 1,000mm）

Turn-mill center （The largest processing diameter 1,600mm）Megaturn (Nexus 900)

■Polishig FacilityOD grinder(4) ID grinder(2) Double edge grinder(2)■Plastic Working FacilityMetal spinning machine

■Measurement FacilityRockwell hardness measureVickers hardness tester

Shore hardness testerMetal microscope

3-D measureShape measureMagnetic particle tester

Microscope for activity analysis(VW-5000)Surface roughness measure

１ unit２ unit

１ unit

２ unit

１ unit

２ unit１ unit

２ unit

２ unit

４ unit

4 unit2 unit

１unit

４unit

５unit

４unit

9 unit6 unit

1 unit1 unit

1 unit

8 unit

2 unit

1 unit1 unit

1 unit1 unit

2 unit3 unit1 unit

1 unit1 unit

Cart type spheroidizing annealing + normalizing furnace

１unit

1 unit

―　４　―

Pro-active. Pursuing quality for peace of mind and reliability and to open up future possibilities.

Overview of staff qualifications/certifications

Sales history

Breakdown of manufacturing products

■ Forging relatedClass 1 press die forging certification　

Class 2 press die forging certification

Class 2 iron casting certification

Class 2 hammer die forging certification

23 people

13 people

1 person

1 person

■ Turning process relatedClass 1 machinist certification

Class 2 machinist certification

Class 2 center lathe certification

3 people

11 people

6 people

■Heat treatment related

Class 2 General metal heat treatment certification

■Maintenance related

Class 2 finishing certification

Class 1 machine maintenance 1 person

1 person

Class 2 machine maintenance 3 person

■OtherMagnetic particle inspection level 1　

Ultrasonic inspection level 1

Penetrant inspection level 1

Energy management certification

Atmospheric class 4 pollution control manager certification

Class 1 electrical chief engineer certification

4 person

3 people

2 people

1 person

1 person

Sales (millions in JPY)

Other

Railway/shipping

Gear related

Bearings

Monthly average 6.5％0.4％5.7％

8.5％2.9％8.4％

2 person

11 people

Class 1 General metal heat treatment certification

2 people

87.4％80.2％

Sales ratio Weight ratio

―　５　―

0

1000

2000

3000

4000

5000

6000

7000

8000

201420112010200920082007200620052004 2013 2015 2016 20172012 2018

Our complete production system, including ring forging, heat treatment, turning, quenching and tempering, grinding and assembly.

―　６　―

Factory layout

Product Process

Cutting processCutting to requested weight

Forging processMaking accurate shape of ring

Heat treatment ProcessHeat treatment to lathe easily

Shot blasting processMaking clean surface by getting rid of surface oxidized membrane .

Tsuttkiri(Ring cutting)processCutting to the requested wide of product

Lathing processLathed by an up-to-date ＮＣ lathe machine

Quenching & Tempering

It distorts, and the transformation is prevented

polishing ・Assembly processWe perform end, outer diameter and inner diameter grinding. After grinding, we integrate rollers and spacers to make a finished product.

Round bar

■TotalGround areaTotal floor space　

101,051.14㎡ 24,574.20㎡

■Head office factory Ground areaTotal floor space

97,414㎡17,370㎡

■The 2nd factoryGround areaTotal floor space

3,306㎡1,421㎡

We contribute to the global environmentby the reduction in weight.We contribute to the global environmentby the reduction in weight.

Ring forging of special materials (stainless steels, coppers, aluminum etc.) is achieved by thorough control of forgimg temprature. copper product after turning(φ500）

Reduce the amount of material used by making deformed ring

We succeeded in the reduction of raw material turned on and shortening the machining time, to make deformed ring by forging process. Deformed ring product(Ø100~Ø1000)

Substantial shortening of the turning time by excelled'Machining Allowance' (3mm in the standard, 6mm in the maximum)

In case the ring of our standard size(Outer diameter 100-300mm), machining allowance as forged condition is 3.0mm per each dimension(Outer/Inner dia. and Width), and it becomes 6.0mm for the ring of 1,000mm in outer diameter, as our maximum size.(equipped with the sizing press facilities)

Manufacturing thin ring of 12mm in thickness

Ring manufacturing by self-designed rolling mill

We have increased productivity by making and improving the tooling matched to product features. (2 rolling millｓ per 1 press)

Ring forging of various metals enabled by heatingfurnace and temprature control technology

We have achieved commercialization and the mass production of thin ring of thickness 12mm, which can replace pipe products.

product with 12mm in one side

The Forging SystemThe Forging SystemStrong point of TANRAY Point1

―　７　―

Raw ｍaterials ～ Control systemRaw ｍaterials ～ Control system

To become an eco-friendly forging manufacturer,we keep challenging every dayTo become an eco-friendly forging manufacturer,we keep challenging every day

Strong point of TANRAY

―　８　―

Point2

Steady procurement of raw materials with lower cost can be achieved by our own heating furnace

Homogeneous structure of the products by spheroidizedannealing furnace(normalizing also possible)

We improve machinability and stabilize hardening by eliminating the internal stress after forging and refining the large crystal grain.

Mass production of the thinner items byenhancing ring cutting ability

We can supply minimum 13.0mm width ring commercially by dividing from its multiples, using in-house developed tuttkiri (cutting) machine.

Reasonable price and short term delivery by integratedproduction system ( forging ～ turning ～ quenching and tempering ～ polishing ～ assembly )

Unified transaction by computer system from the orders to the deliveriesProduction cost and process control at each manufacturing process is managed unitary by our computer system. The time spent on management is minimized by this system and reduction of total production cost and strict delivery can be achieved too.

Cost reduction by using round bars as rolled condition(Material diameter 95mm or less)

Our integrated production( forging ～ turning ～ quenching and tempering ～ polishing ～ assembly ) can minimize the time loss of transportation and achieve the delivery in a short term. It also save the time and labor of inventry control at customer.

cutting off the sectionalarea of 333cm² in 3minutes

Before tuttkiri

After tuttkiri

(φ270)

Products

structure photograph after sepherodizing Photographing with a microscope of 500