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ＣＢ－Ｂ２５型齿轮泵采用小侧隙齿轮和相应的卸荷槽，可较好的解决困油问题，使泵的噪声由７２～７６ ｄＢ降到６５ ｄＢ左右，压力脉动由±２．８６ ｋｇｆ／ｃｍ２降到±０．７６ ｋｇｆ／ｃｍ２，容积效率达９０％以上。该齿轮泵试用于平面磨床，可提高磨削光洁度一级到一级半。
CB-B25 gear pump with a small backlash gear and the corresponding relief groove, can better solve the trapped oil problem, the pump noise from 72 ~ 76 dB down to about 65 dB, the pressure pulsation from ± 2.86 kgf / Cm2 down to ± 0.76 kgf / cm2, the volumetric efficiency of more than 90%. The gear pump test for surface grinder, can improve the grinding finish one to one and a half.