Summary of Contents for Webster B
- Page 1 Hardness Tester INSTRUMENT, INC. 11856 Mississippi Avenue Los Angeles, California 90025 Tel (310) 479-6770 Fax (310) 478-1365 Sales@wi-i.com www.webstertesters.com Instruction Manual Model B, B-75 & BB-75...
- Page 2 ® Hardness Testers MODEL B, B-75 & BB-75 FIG. 9 WEBSTER HARDNESS TESTERS ® Parts list for Model B, B-75 and BB-75 Webster Hardness Testers are made in three ® MODEL distinct models. All operate in the same manner B-75...
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Page 3: Principal Of Operation
All models em- ploy single point penetrators but are different in contour and should never be used inter-changeably. The load springs for Models B and BB-75 are identical. The Model B-75 uses a heavier spring. Return springs for all models are identical. - Page 4 On metal of extreme The B-75 Tester is designed for use on brass and hardness the penetrator will recede into the hous- mild steel and the 20 dial graduations will cover ing until the tip is flush with the housing face.
- Page 5 This zero line is at 20 on the B, adjustment until readings agree. When adjusted B-75 and BB-75 models. After this zero adjustment...
- Page 6 The handle pressure required to operate the Model B Tester is the lightest of any of the three models. This tester is designed for use on aluminum and its alloys but may also be used for...
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Questions and answers
doesn't zero and read 1 point high on the test strip
The Webster B reads 1 point high on the test strip instead of zero because the load spring adjustment is not correct. The dial indicator must be zeroed correctly, and if the reading does not match the number stamped on the standard sample, a slight adjustment of the load spring is required until the readings agree.
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