東京発条製作所 List of Products and Services

The series consists of five types: "Power Spring," "High Deflection Power Spring," "Power Spring α (Alpha)," "LR/MR Round Wire Coil Spring," and "J Spring." In particular, "Power Spring" and "High Deflection Power Spring" are color-coded through anionic electrodeposition coating, making it easy to distinguish between various types of springs. Additionally, "Power Spring," "High Deflection Power Spring," "Power Spring α (Alpha)," and "LR/MR Round Wire Coil Spring" are made from silicone chrome steel for springs (with "LR/MR" partially made from B-type piano wire), while "J Spring" is made from stainless steel wire 304-WPB for springs, offering excellent performance in high stress, amplitude, and heat resistance. The specification table includes detailed information on spring constants, deflection, load, free length, outer diameter, inner diameter, and more. ● For further details, please download the catalog or contact us.

We can provide proposals based on designs that take into account your desired conditions, including various non-magnetic, corrosion-resistant, and heat-resistant springs, as well as special shapes and special hook springs.

The applications are varied, but we have received high praise for our coil springs for plastic molds. The TR/TY series can achieve a deflection of 50% of the free length. The TU series can achieve a deflection of 65% of the free length. 【Types】 1. Deflection of 50% of the free length: TR/TY series 2. Deflection of 65% of the free length: TU series

This powerful spring α has been standardized based on overseas demand. Compared to the powerful spring series, it has a wider inner diameter.

JIS B 5012:1998 refers to round wire coil springs used for pressing. The outer diameter ranges from 3 to 25 mm, and the free length ranges from 10 to 300 mm.

**Features** - Belleville springs have a significantly higher energy storage per unit volume compared to coil springs, providing a large load capacity in a small space with minimal stroke. - The load/deflection characteristic curve can effectively be selected based on usage conditions, with options for linear and particularly nonlinear characteristics. - Spring characteristics can be altered by increasing or decreasing the number of springs and by combining them in series or parallel. - When used appropriately, they can be utilized efficiently across a wide range of applications for multiple purposes. - If used within the allowable stress range, they can withstand long-term use. - They are rich in shock absorption, and in stacked conditions, they exhibit particularly excellent cushioning efficiency. **Load Tolerance** The actual load tolerance compared to the calculated values is displayed in Appendix 1. For a plate thickness of 1mm, the tolerance for Belleville springs is larger than that for a plate thickness of 1mm. - For more details, please contact us or download the catalog.

Our company has standardized springs using non-circular cross-section materials for the first time. The standards created by that technology are powerful springs. Compared to round wire coil springs, they achieve high loads in a small space. 【Types】 1. Light small load / TF 2. Light load / TL 3. Medium load / TM 4. Heavy load / TH 5. Extra heavy load / TB

This is our original standard based on the international standard ISO 10243. It has received high praise worldwide, particularly in Europe. The ISO STANDARD spring developed by Tohatsu, utilizing our accumulated technological expertise, is designed with consideration for overall balance, including durability and load, and is set according to Tohatsu's original specifications.

This is a round wire coil spring made of stainless steel wire (SUS304-WPB). The standards include compression coil springs (JA) and tension coil springs (JB). The wire diameter ranges from 0.2 to 1.6 mm.