MECHANICAL ENGINEERING HERITAGE NO.34
The Master Worm Wheel of the Hobbing Machine HRS-500
The master worm wheel of the hobbing machine HRS-500 manufactured by Shibarura Machine Works Co., Ltd. is a high-precision gear cutter capable of cutting large gears 5,000 mm in diameter. The seventh master worm wheel machined by the hobbing machine itself boasts the world’s highest precision, with a maximum accumulated pitch error of 4/1,000 mm. The large hobbing machines manufactured using this machine are used for cutting large reduction gears for ship turbines still today. No gear exceeding such precision has been manufactured to date.
On exhibition (Reservation required)
Toshiba Machine Co., Ltd.
- Hours open:
- 9:00–16:00 (Entry closes at 15:30.)
- Admission fee:
- Days closed:
- Saturdays, Sundays, public holiday, year-end/New Yearʼs, Bon holidays, etc.
- 2068-3 Ooka, Numazu-shi, Shizuoka 410-8510
- 5 mins. by taxi from JR Numazu Sta. 15 mins. by taxi from JR Mishima Sta. (recommended, as bullet train is available)