Japan-Made worm and gear

  • SELLING POINT
  • ABRASION TEST
  • TENSILE TEST

SELLING POINT

The unique selling point of TJR worm gear

  Others
The worm gear material Made in Japan, High tensile brass with Japanese unique formula.
Its strength is better than others.
Aluminum Bronze (ALBC3/ALBC1) or Phosphor Bronze (PBC2/PBC3)
Abrasion resistance The abrasion resistance of High tensile brass: 25.1 mg/cm2 per 10,000m
Its estimated wear life is 2.6 times longer than that of Aluminum Bronze
The abrasion resistance of Aluminum Bronze: 65.7mg/cm2 per 10,000m
Wear Life Normally 10 years of longer At most 4 years

ABRASION TEST

Abrasion test for the special high tensile brass (copper compound metal)

Testing method

Under predefined conditions sliding/ abrasion test was conducted by placing the disc in the given hydraulic oil, then make the sliding surface touch three partner material pins. The ware volume per unit area was calculated based on the weight change of the disc after the test.

Sliding Distance (m) Abrasion (mg/cm2)
ALBC3 PBC3 Special High Tensile Brass
100 9.3 4.6 7.9
1000 27.8 20.5 15.6
10000 65.7 134.4 25.1

Abrasion resistance has increased comparing to ALBC3 and PBC3. It lengthens the machine life and improves the precision and operation rate as well.

TENSILE TEST

The special high tensile brass (copper compund metal) tensile test

No. Sample Tension Testing Sign
measurement(mm) JIS(No) Tensile load(kN) Tensile strength(N/mm2) elongation(%)
1 Ø14.0 4 49.4 321 6 PBC3(1)
2 Ø14.0 4 48.3 314 6 PBC3(2)
3 Ø14.0 4 72.2 474 8 SpecialHigh-tensile brass
4 Ø14.0 4 75.5 490 8 Special High-tensile brass
5 Ø14.0 4 106 689 26 ALBC3(1)
6 Ø14.0 4 105 682 22 ALBC3(2)

Stronger than PBC3, and shown the strength close to that of ALBC3

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