Yes, I founded “IT Industry” in April of 1974, named after my father, “Takeo Ishiyama”. First job was to polish headshells by surface grinding, by myself, with no employees. Now we have 21 employees, including my daughter and son-in-law.
Numerous analog products like tonearms, cartridges, various cables and accessories. In addition, we assemble phono stages and preamplifiers.
Assembling work of medical equipment and wiring harnesses (Until Year 2005) and electrode for the automotive industry.
I could say, several tonearm brands.
All parts are designed and manufactured in house by our own machine tools, including our own CNC milling machine center, and manual tool room lathe. Some parts with large diameters (30 – 60mm), and extremely complicated parts, only producible by compound CNC machining with “live tooling”, are produced by sub-contractors.
The assembly and tuning of our tonearms are made by our craftsmen for ideal mechanical contact, without rattling or play, by hand polishing.
FANUC 5 axis CNC mill/machining center, manual tool room lathe, manual milling machine, surface grinder, shot blast machine, buff grinder, plastic injection molding machine.
Sorane (Abis) are IT Industry original products, and all parts are machine tooled, not die-cast.
None, we are what we are.
To extract details, at the maximum level, of each cartridge, while maintaining their good tracking ability.
We constantly maintain and refine a philosophy originated by legendary Osamu Ikeda-san, at Ikeda cartridges, to get detailed and rich reproduction from bass to treble, by identifying new materials and improved surface finishes.
3 models, and we improved the Ikeda “IT-345/407”tonearms.
There is no general answer, but my preference is for the J-shape or straight wands. However, besides shape and bearings, tonearms require appropriate inertia and mass.
In general, gimbal tonearms are more complex structures, dictating the shape of the bearing housing.
Bearing selection for gimbal bearings are somewhat dictated by the axis of motion. Horizontal and vertical bearings have completely different demands. For dynamic balanced types, the bearings themselves dictate the design, both vertical and horizontal movements being defined by bearing motion.
Aluminum, Iron, stainless steel, brass, titanium, engineering plastic, wood etc..
Another way for favorable results is to perfectly mate the various parts, by carefully hand grinding and polishing the mating surfaces , using industrial diamond, carbide, etc..
Composite of 2 kinds, hybrid type, like 4N copper plus 6N copper.
Yes, gardening, breeding Stag beetles, breeding RANCHUU gold fish, breeding cactus, fishing, mountain camping.
Yes, my daughter and son in law.
Japanese Soul Song, Pops song, Jazz.
Yes, around 300 pcs, after getting Ikeda business.
Yes, Mr.Osamu Ikeda, designer of Ikeda cartridges and tonearms.