JIS K 6301 was established in 1950 and had sustained base of rubber industry of our country but was discontinued in 1998 because it did not comply with ISO and also JIS K 6253 was prescribed on its behalf. However, It had been used for 60 years as “Rubber hardness tester” and even now it is used as test data between certain parties in charge with mutual consensus although movement to new JIS has progressed and standard is discontinued. There are 2 models such as Spring type A and type C for hard rubber.
| Model | Type | Application/Materials | Conform Standard |
Spring Load Value (0-100) |
Indentor Shape | Indentor Height | Weight (g) |
| GS-706G | A (old type) (Peak Pointer type) |
General Rubber | JIS K 6301 Spring Type A |
539-8385mN (55-855gf) | Truncated Cone of R0.79 with 35° angle | 2.54 | 208 |
