千(qian)斤頂按3411.58-99標準制造(zao)，用于檢測零部件時的(de)支承，產品分別為(wei)鋼件和鑄鐵件，外表面(mian)有鍍鉻(ge)和涂漆兩種。

　　結(jie)(jie)構(gou)(gou)完(wan)善的千(qian)(qian)斤(jin)頂(ding)(ding)(ding)由：螺(luo)(luo)(luo)(luo)桿(gan)、螺(luo)(luo)(luo)(luo)母(mu)、底座、螺(luo)(luo)(luo)(luo)釘、螺(luo)(luo)(luo)(luo)母(mu)組成，螺(luo)(luo)(luo)(luo)桿(gan)一般用(yong)(yong)(yong)中碳鋼制造。頂(ding)(ding)(ding)端(duan)需局(ju)部淬火。適用(yong)(yong)(yong)于毛(mao)坯劃線。工(gong)作時，用(yong)(yong)(yong)三個(ge)千(qian)(qian)斤(jin)頂(ding)(ding)(ding)把工(gong)件(jian)支(zhi)撐起來，經調(diao)整螺(luo)(luo)(luo)(luo)母(mu)即可(ke)改變(bian)工(gong)件(jian)的高度，以便(bian)確定工(gong)件(jian)的基準。選擇的支(zhi)撐點距離應(ying)盡(jin)可(ke)能遠些，還(huan)(huan)可(ke)在支(zhi)撐點處預先沖好(hao)樣沖眼(yan)，保(bao)證支(zhi)撐穩(wen)定可(ke)靠。大型笨重毛(mao)坯劃線時，可(ke)另設幾個(ge)保(bao)險(xian)用(yong)(yong)(yong)輔助千(qian)(qian)斤(jin)頂(ding)(ding)(ding)。支(zhi)撐面狹窄且工(gong)件(jian)細高時，可(ke)用(yong)(yong)(yong)稍許(xu)放松(song)的吊鏈保(bao)護。頂(ding)(ding)(ding)端(duan)結(jie)(jie)構(gou)(gou)還(huan)(huan)有V形塊(kuai)式和雙滾輪式的。宜(yi)分別用(yong)(yong)(yong)來支(zhi)撐一般或大型階梯軸類零件(jian)劃線。