楔角(V带两个侧面之夹角)为40°，相对高度为0.9，由包布层、伸张胶层、强力层和压缩胶层等部分组成。
强力层由多层涂胶帘布或单排浸胶线绳组成。带顶面宽与带高之比为1.1～1.2，带宽较普通V带缩小了约1/3，故横向刚度大。带顶呈弓形，使绳芯受力时仍保持排列整齐，因而受力均匀，充分发挥每根线绳的作用。强力层线绳排放位置稍高，带两侧呈内凹形，其强力层和压缩胶层之间设置一层定向纤维胶片。由于结构上的特点，在相同的速度下，传动能力比普通V带可提高0.5～1.5倍。而在传动功率相同时，窄V带的结构尺寸较普通V带减少50%，使用寿命明显延长，极限速度可达40～50m/s，传动效率可达90%～97%。此外使用窄V带可使传动中心距缩短，带轮宽度减少，广泛用于各种动力传递。
SPA窄V带型号大全
SPA1000 SPA1016 SPA1018 SPA1020 SPA1025 SPA1041 SPA1050 SPA1067 SPA1078 SPA1080 SPA1092 SPA1100 SPA1120 SPA1125 SPA1138 SPA1143 SPA1150 SPA1168 SPA1175 SPA1180 SPA1194 SPA1198 SPA1200 SPA1219 SPA1225 SPA1245 SPA1250 SPA1268 SPA1270 SPA1275 SPA1290 SPA1295 SPA1300 SPA1321 SPA1325 SPA1338 SPA1346 SPA1350 SPA1772 SPA1375 SPA1397 SPA1400 SPA1418 SPA1422 SPA1425 SPA1448 SPA1450 SPA1473 SPA1475 SPA1499 SPA1500 SPA1518 SPA1524 SPA1525 SPA1549 SPA1550 SPA1575 SPA1600 SPA1618 SPA1625 SPA1626 SPA1650 SPA1651 SPA1675 SPA1676 SPA1700 SPA1718 SPA1725 SPA1727 SPA1750 SPA1753 SPA1775 SPA1778 SPA1800 SPA1803 SPA1818 SPA1825 SPA1850 SPA1854 SPA1875 SPA1880 SPA1900 SPA1905 SPA1918 SPA1925 SPA1930 SPA1950 SPA1956 SPA1975 SPA1981 SPA2000 SPA2007 SPA2018 SPA2032 SPA2050 SPA2057 SPA2075 SPA2083 SPA2100 SPA2108 SPA2134 SPA2138 SPA2150 SPA2159 SPA2184 SPA2200 SPA2210 SPA2235 SPA2240 SPA2250 SPA2261 SPA2286 SPA2300 SPA2311 SPA2318 SPA2325 SPA2337 SPA2350 SPA2362 SPA2378 SPA2388 SPA2400 SPA2413 SPA2418 SPA2438 SPA2450 SPA2464 SPA2489 SPA2500 SPA2515 SPA2518 SPA2540 SPA2550 SPA2565 SPA2591 SPA2600 SPA2616 SPA2618 SPA2625 SPA2642 SPA2650 SPA2667 SPA2668 SPA2692 SPA2700 SPA2718 SPA2743 SPA2750 SPA2794 SPA2800 SPA2818 SPA2820 SPA2845 SPA2850 SPA2865 SPA2870 SPA2896 SPA2900 SPA2918 SPA2920 SPA2946 SPA2950 SPA2972 SPA2997 SPA3000 SPA3018 SPA3048 SPA3050 SPA3080 SPA3099 SPA3100 SPA3150 SPA3168 SPA3200 SPA3250 SPA3251 SPA3300 SPA3302 SPA3350 SPA3353 SPA3368 SPA3400 SPA3404 SPA3568 SPA3600 SPA3650 SPA3658 SPA3700 SPA3708 SPA3734 SPA3750 SPA3768 SPA3800 SPA3810 SPA3850 SPA3861 SPA3900 SPA3912 SPA3937 SPA3950 SPA3962 SPA3988 SPASPA4000等
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