Parts Division | 株式会社桜井製作所

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Product Case Studies

Auto parts

SAKURAI has an extensive record when it comes to processing parts that are central to automobiles, such as transmission cases and engine parts.
Backed by advanced technology, we can provide high-quality functional parts to automobile manufacturers, both domestically and overseas. 　　　　　　　　　　　　　　　　　　　　　　　　
In recent years, we have also been contracted to produce cases for drive motors

Industrial machinery/general-purpose parts

SAKURAI processes engine parts for outboard motors and agricultural machinery. In addition to the stable supply of products, we have a dedicated line to handle multi-variety, multi-functional products.

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Prototype/lot production

In the processing of prototypes, with confidentiality at the core of what we do, we maintain a challenge mindset towards the development of new technologies. Providing parts that can withstand extreme environments is proof of our technical capabilities, and we are in constant pursuit of even higher precision.

5-axis control machining center

　R0 corner end mill processing
Male and female connector processed to fit pin angle.

　Thin ribbed sphere
Each rib is 0.4mm thick and is composed of a combination of pentagons and hexagons.
There is a reverse bank on the protruding part of the pentagonal part,
and it can only be used with 5-axis simultaneous control machining.
The protrusions in between the ribs are attached for protection.

　Octo structural sphere
Machined from a single piece of material.
Each sphere has a minimum clearance of 0.5mm
and has a combination of 5 and 6 corners on the exterior.
It is a 32-sided and the inner surface is spherical

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Production Record

Transaxle housing automated production line

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1) AT/MT/CVT case processing for automobile powertrains	approx. 12,000 units monthly
2) Machining motor cases for driving automobiles	approx. 4,000 units monthly
3) Cylinder head processing for automobile V6 engines	approx. 6,000 units monthly
4) Other general-purpose engines and outboard engines such as cylinder heads, head covers, etc.	approx. 4,000 units monthly
5) Machining of cylinder heads and blocks for engines of agricultural and construction machinery	approx. 2,000 units monthly
6) Motorcycle cylinder processing	approx. 30,000 units monthly

Case study of Non-mass production parts

1.　Fixed-term on-demand production

Support for customers whose production capacity is overwhelmed by demand, based on contractsranging from around three to twelve months. Examples include
1)Passenger car transmission cases: 16,000 units (8,000 sets) per month under 6-month contracts
2)Cylinder heads for straight-six diesel engines of passenger cars: 100 sets per month over one year
3)Motorcycle cylinder heads: 2,000 units per month over six months

2.　Long-term, low-volume production

Support for customers that are outsourcing processes due to reduced output, particularly whereproduction has peaked out and manufacturing equipment and space are being repurposed. Examplesinclude
1)Passenger car transmission cases: 16,000 units (8,000 sets) per month under 6-month contracts
2)Cylinder heads for straight-six diesel engines of passenger cars: 100 sets per month over one year
3)Motorcycle cylinder heads: 2,000 units per month over six months

3.　Fabrication of parts and test pieces

1) Automatic transmission valve bodies: 40 units
2) Motorcycle cylinders (old model): 50 units
3)Test pieces to support customer testing of new equipment

4.　Fabrication of experimental parts and prototypes

1) Full processing of V8 cylinders blocks for a racing engine
2) Full processing of an experimental CVT transmission case
3)Cutting tests for parts being considered for mass production

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Equipment introduction

Processing Facilities
Machine	Spindle taper hole	Manufacturer	Model	Number	X-axis	Y-axis	Z-axis	Number of ATCs
Horizontal machining center	50	ENSHU Limited	JE80	5	800	800	800	40
		ENSHU Limited	GE580H	6	800	800	800	40
		Okuma Corporation	MA-600HB	2	1000	900	1000	40
		Okuma Corporation	MA-600HBSP	1	1000	900	1000	60
		MITSUI SEIKI KOGYO CO.,LTD.	HS5A(8-APC)	1	850	700	750	150
		Makino Milling Machine Co., Ltd.	a81nx	1	900	900	1020	187
		DMG MORI CO., LTD.	NH5000	2	730	730	850	54
		Matsuura Machinery Corporation	H.Plus-500	1	800	800	800	60
		JTEKT CORPORATION	FH630SX-i	1	1050	900	1050	60
		SAKURAI LTD.	SH5A（5-axis）	1	700	500	700	30
		SAKURAI LTD.	SH6A（5-axis）	1	1000	1000	1000	60
	40	ENSHU Limited	JE60	1	600	600	630	40
		ENSHU Limited	JE60S	14	600	600	630	40
		ENSHU Limited	JE80S	14	800	800	800	40
		ENSHU Limited	GE480H	8	800	800	800	40
		ENSHU Limited	GE460H	2	600	600	600	40
		ENSHU Limited	JE50S	4	500	500	500	24
		Okuma Corporation	MX-40HA	3	600	610	610	30
		Okuma Corporation	MA-40HA	1	600	610	610	30
		Toyoda Machine Works Ltd.	FA45	1	600	600	560	40
		KIWA MACHINERY CO., LTD.	BH-45	1	640	610	680	40
		KIWA MACHINERY CO., LTD.	Triple H40	14	510	510	400	20
		JTEKT CORPORATION	FH400J	1	600	560	630	60
	30	ENSHU Limited	GE30H	4	500	500	500	24
		ENSHU Limited	JE30S	8	500	350	300	16
Vertical machining center	50	ENSHU Limited	EV-650	1	1300	610	760	30
		ENSHU Limited	EV-530	3	820	530	510	30
		Okuma Corporation	MB-56VA	2	1050	560	460	20
		Okuma Corporation	MX-45VB-R	1	560	460	450	20
		Okuma Corporation	MB-46VBE	2	760	460	460	20
		OKK	VM53R	2	1050	530	510	30
		OKK	VM5Ⅲ	1	820	510	510	20
		JTEKT CORPORATION	FV1165S	3	1100	650	600	30
	30	ENSHU Limited	EV360	3	600	360	360	24
		FANUC CORPORATION	a-D21LiB5	4	700	400	330	21
Total				120


Other equipment
Machine		Manufacturer	Model	Number
NC lathe		Okuma Corporation	LB250T	1
			LB4000EXⅡ	2
		Takisawa Machine Tool Co., Ltd.	TCN-3500L10	1
Double head rotary milling machine		SAKURAI LTD.	2A-860	2
			2A-1200	3
			2B-1200	3
			5M-1200	1
			5H-1500	3
Multi-axis head changing machine		SAKURAI LTD.	TURREX MHC-4HD	5
Honing machine		SAKURAI LTD.	35HV	1
			45HV	2
General purpose lathe				1
General-purpose milling machine				4

The Customers of PARTS DIV

Ahresty Corporation
AISIN AW CO.,LTD.
KUBOTA CORPORATION
KOFU MEIDENSHA ELECTRIC MFG. CO., LTD.
JATCO LTD.
SUZUKI MOTOR CORPORATION
NIDEC CORPORATION
HIROSHIMA ALUMINUM IND.CO.,LTD.
HONDA MOTOR CO.,LTD.
MITSUBISHI HEAVY INDUSTRIES, LTD.
YAMAHA MOTOR CO.,LTD.
YANMAR POWER TECHNOLOGY CO., LTD.
RYOBI LIMITED