Model SDSC-1200 Series :
Slitting Jig Vulcanized
Rubber Tear Test Specimen
(Jointly developed product with Shin-Etsu Chemical Co., Ltd.)

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Jointly developed product with Shin-Etsu Chemical Co., Ltd.
This is the special tool to cut a slit of the specified dimension to the test specimen.
Unlike conventional type, the slit can be certainly cut as specified to the soft material like silicone rubber.
Because, the blade edge slides to cut like an arc.
Model SDSC-1200NJ | for JIS K6252, ISO 34-1 Crescent test specimenNick depth 1.00±0.2㎜ |
Model SDSC-1200J | for JIS K6301 A-shapedNick depth 0.50±0.08㎜ |
for ASTM D624 Die BNick depth 0.50±0.05㎜ | |
Operation Method | 2.The operation is completed only by lightly pressing down the cavity part. |
Dimensions | (Approx.) (W)130×(D)150×(H)220㎜ |
Ⅰ Comparison of a slit part by the pictures between Conventional jig and New jig
Hardness: JIS-A 62
Tensile strength: 5.49MPa
Elongation: 240%
LEFT:Conventional jig
RIGHT:New jig
Hardness: JIS-A 14
Tensile strength: 4.31MPa
Elongation: 760%
LEFT:Conventional jig
RIGHT:New jig
Ⅱ Comparison by data between Conventional jig and New jig
Table 1Comparison of result in silicone rubber
Conventional jig (0.5㎜) | New jig (0.5㎜) | New jig (1.0㎜) | ||
Average value (㎜) of slitting length |
Shallow | 0.442 | 0.488 | 0.986 |
Deep | 0.688 | 0.545 | 1.055 | |
Average *1 | 0.565 | 0.517 | 1.020 | |
Difference of slitting | 0.246 | 0.057 | 0.069 | |
CV value (%) of slitting |
Shallow | 21.4 | 5.5 | 7.8 |
Deep | 24.3 | 6.9 | 10.0 | |
Average *2 | 12.6 | 4.9 | 8.7 | |
CV value (%) of tear strength | 2.7 | 2.1 | 1.7 |
*0 Reference Value : Hardness: JIS-A 60, Tensile strength: 7.94MPa, Elongation: 290%】
*1 Average is length calculated by (Shallow + Deep) / 2
*2 Calculated based on average value of each [*1]
Table 2Comparison in various rubbers
Kinds | Reference property | Slitting length (㎜) *1 | CV value (%) of slitting *1 | ||||
Hardness | Tensile strength | Elongation | Conventional jig (0.5㎜) |
New jig (0.5㎜) | Conventional jig (0.5㎜) |
New jig (0.5㎜) | |
A | JIS-A 14 | 4.31MPa | 760% | 0.867 | 0.475 | 23.3 | 19.0 |
B | JIS-A 30 | 4.70MPa | 340% | 1.058 | 0.548 | 26.6 | 6.8 |
C | JIS-A 38 | 7.06MPa | 350% | 1.018 | 0.510 | 9.2 | 3.9 |
D | JIS-A 60 | 7.84MPa | 290% | 0.565 | 0.517 | 12.6 | 5.0 |
E | JIS-A 62 | 5.49MPa | 240% | 0.492 | 0.475 | 2.9 | 0.0 |
*1 Slitting length and CV value of slitting are calculated by average of slitting. (Average of slitting of front and back of test specimen (Shallow + Deep) / 2)
Kinds | Reference property | Slitting length (㎜) *1 | CV value (%) of slitting *1 | ||||
Hardness | Tensile strength | Elongation | Conventional jig (0.5㎜) |
New jig (0.5㎜) | Conventional jig (0.5㎜) |
New jig (0.5㎜) | |
For roll | JIS-A 1 | 0.98MPa | 450% | not slit | 0.625 | not slit | 0.0 |
For roll | JIS-A 10 | 1.27MPa | 300% | 0.900 | 0.592 | 7.4 | 6.5 |
Rubber contact | JIS-A 13 | 4.12MPa | 740% | 1.317 | 0.625 | 17.6 | 14.4 |
Rubber contact | JIS-A 14 | 4.31MPa | 760% | 0.867 | 0.475 | 23.3 | 19.0 |
For die making | JIS-A 30 | 4.70MPa | 340% | 1.058 | 0.548 | 26.6 | 6.8 |
For nipple | JIS-A 35 | 10.78MPa | 890% | 0.485 | 0.586 | 37.8 | 7.1 |
For die making | JIS-A 36 | 11.76MPa | 900% | 0.858 | 0.617 | 13.1 | 2.3 |
Rubber contact | JIS-A 38 | 7.06MPa | 350% | 1.018 | 0.510 | 9.2 | 3.9 |
For insulating material |
JIS-A 60 | 7.84MPa | 290% | 0.565 | 0.517 | 12.6 | 5.0 |
For die making | JIS-A 62 | 5.49MPa | 240% | 0.492 | 0.475 | 2.9 | 0.0 |
*1 Slitting length and CV value of slitting are calculated by average of slitting. (Average of slitting of front and back of test specimen (Shallow + Deep) / 2)
Unevenness of slitting of all products | |||
CV value (%) Manual | CV value (%) Machine (0.5㎜) | CV value (%) Machine (1.0㎜) | |
Shallow | 53.0 | 10.4 | 6.4 |
Deep | 33.0 | 11.9 | 8.1 |
Average | 37.3 | 8.5 | 6.7 |
Average (mm) of slitting of all products | |||
Manual | Machine (0.5㎜) | Machine (1.0㎜) | |
Shallow | 0.640 | 0.495 | 1.002 |
Deep | 0.966 | 0.575 | 1.098 |
Average | 0.803 | 0.535 | 1.050 |
Difference of front & back | 0.326 | 0.080 | 0.096 |
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