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Nord-Lock碳钢垫片是什么
防松垫片，也叫防松垫圈，制锁垫圈，锁紧垫圈，组合锁紧垫圈等。1982年，瑞典Nord-Lock AB公司开始致力于生产一种为螺栓连接设计的优良的**系统，其名字就叫Nord-Lock，中文意思为防松垫圈。这种垫圈提供了一种不会受任何振动或动力负载影响的螺栓**锁紧系统，这种螺栓**系统结构单一，只由具有特殊凸轮齿面并预先组合的一对垫圈构成。经过不断的技术更新和研发，Nord-Lock防松垫圈逐渐成为目前世界上*高效的一种螺栓**紧固系统。Nord-Lock碳钢垫片，由EN 1.7182或者等同材质制作，表面镀锌，淬火处理。
Nord-Lock碳钢垫片由两片相同的垫圈组成一套，每片的上、下面带有不同锯齿。一面为凸轮状大齿，其斜坡角度α大于螺栓螺纹角β，另一面为较密小齿。垫圈安装时，要大齿面相对，成对安装。小齿面分别与螺母和被紧固件接触。拧紧螺栓连接紧固件后，振动发生时，大齿面会错动抬升，并由α角大于β角的原理来锁住螺栓，使之不能松动。
Nord-Lock碳钢垫片不是利用摩擦力而是利用机械结构锁紧。它是由一对有相互咬合的齿面的垫圈构成。相互咬合的角度“α”大于螺纹的升角“b”，这样就有效地阻止螺丝的松动。
Nord-Lock碳钢垫片规格表：
| Nord-Lock碳钢垫片规格表 | |||||||
| 垫片尺寸 | 螺栓尺寸 | 内径d1 | 外径d2 | 厚度T | *小包装 | 约重 | |
| 公制 | 美制 | ||||||
| NL3 | M3 | #5 | 3.4 | 7.0 | 1.8 | 200 | 0.03 |
| NL3.5 | M3.5 | #6 | 3.9 | 7.6 | 1.8 | 200 | 0.04 |
| NL3.5sp | M3.5 | #6 | 3.9 | 9.0 | 1.8 | 200 | 0.06 |
| NL4 | M4 | #8 | 4.4 | 7.6 | 1.8 | 200 | 0.04 |
| NL4sp | M4 | #8 | 4.4 | 9.0 | 1.8 | 200 | 0.06 |
| NL5 | M5 | #10 | 5.4 | 9.0 | 1.8 | 200 | 0.05 |
| NL5sp | M5 | #10 | 5.4 | 10.8 | 1.8 | 200 | 0.11 |
| NL6 | M6 |
| 6.5 | 10.8 | 1.8 | 200 | 0.07 |
| NL6sp | M6 |
| 6.5 | 13.5 | 2.5 | 200 | 0.20 |
| NL1/4" |
| 1/4" | 7.2 | 11.5 | 1.8 | 200 | 0.08 |
| NL1/4"sp |
| 1/4" | 7.2 | 13.5 | 2.5 | 200 | 0.18 |
| NL8 | M8 | 5/16" | 8.7 | 13.5 | 2.5 | 200 | 0.15 |
| NL8sp | M8 | 5/16" | 8.7 | 16.6 | 2.5 | 200 | 0.28 |
| NL3/8" |
| 3/8" | 10.3 | 16.6 | 2.5 | 200 | 0.23 |
| NL3/8"sp |
| 3/8" | 10.3 | 21.0 | 2.5 | 200 | 0.48 |
| NL10 | M10 |
| 10.7 | 16.6 | 2.5 | 200 | 0.22 |
| NL10sp | M10 |
| 10.7 | 21.0 | 2.5 | 200 | 0.47 |
| NL11 | M11 | 7/16" | 11.4 | 18.5 | 2.5 | 200 | 0.29 |
| NL12 | M12 |
| 13.0 | 19.5 | 2.5 | 200 | 0.29 |
| NL12sp | M12 |
| 13.0 | 25.4 | 3.4 | 100 | 0.93 |
| NL1/2" |
| 1/2" | 13.5 | 19.5 | 2.5 | 200 | 0.27 |
| NL1/2"sp |
| 1/2" | 13.5 | 25.4 | 3.4 | 100 | 0.90 |
| NL14 | M14 | 9/16" | 15.2 | 23.0 | 3.4 | 100 | 0.56 |
| NL14sp | M14 | 9/16" | 15.2 | 30.7 | 3.4 | 100 | 1.41 |
| NL16 | M16 | 5/8" | 17.0 | 25.4 | 3.4 | 100 | 0.67 |
| NL16sp | M16 | 5/8" | 17.0 | 30.7 | 3.4 | 100 | 1.28 |
| NL18 | M18 |
| 19.5 | 29.0 | 3.4 | 100 | 0.85 |
| NL18sp | M18 |
| 19.5 | 34.5 | 3.4 | 100 | 1.58 |
| NL3/4" |
| 3/4" | 20.0 | 30.7 | 3.4 | 100 | 1.05 |
| NL3/4"sp |
| 3/4" | 20.0 | 39.0 | 3.4 | 100 | 2.20 |
| NL20 | M20 |
| 21.4 | 30.7 | 3.4 | 100 | 0.93 |
| NL20sp | M20 |
| 21.4 | 39.0 | 3.4 | 100 | 2.03 |
| NL22 | M22 | 7/8" | 23.4 | 34.5 | 3.4 | 100 | 1.29 |
| NL22sp | M22 | 7/8" | 23.4 | 42.0 | 4.6 | 50 | 3.31 |
| NL24 | M24 |
| 25.3 | 39.0 | 3.4 | 100 | 1.68 |
| NL24sp | M24 |
| 25.3 | 48.5 | 4.6 | 50 | 4.51 |
| NL1" |
| 1" | 27.9 | 39.0 | 3.4 | 100 | 1.53 |
| NL1"sp |
| 1" | 27.9 | 48.5 | 4.6 | 50 | 4.20 |
| NL27 | M27 |
| 28.4 | 42.0 | 5.8 | 50 | 3.29 |
| NL27sp | M27 |
| 28.4 | 48.5 | 5.8 | 25 | 5.39 |
| NL30 | M30 | 1 1/8" | 31.4 | 47.0 | 5.8 | 50 | 4.20 |
| NL30sp | M30 | 1 1/8" | 31.4 | 58.5 | 6.6 | 25 | 8.96 |
| NL33 | M33 | 1 1/4" | 34.4 | 48.5 | 5.8 | 25 | 3.97 |
| NL33sp | M33 | 1 1/4" | 34.4 | 58.5 | 6.6 | 25 | 8.31 |
| NL36 | M36 | 1 3/8" | 37.4 | 55.0 | 6.6 | 25 | 5.59 |
| NL36sp | M36 | 1 3/8" | 37.4 | 63.0 | 6.6 | 25 | 9.15 |
| NL39 | M39 | 1 1/2" | 40.4 | 58.5 | 6.6 | 25 | 6.28 |
| NL42 | M42 |
| 43.2 | 63.0 | 6.6 | 25 | 7.47 |
| NL45 | M45 | 1 3/4" | 46.2 | 70.0 | 7 | 25 | 10.20 |
| NL48 | M48 |
| 49.6 | 75.0 | 7 | 25 | 12.00 |
| NL52 | M52 | 2" | 53.6 | 80.0 | 7 | 25 | 13.00 |
| NL56 | M56 | 2 1/4" | 59.1 | 85.0 | 7 | 10 | 13.50 |
| NL60 | M60 |
| 63.1 | 90.0 | 7 | 10 | 15.20 |
| NL64 | M64 | 2 1/2" | 67.1 | 95.0 | 7 | 10 | 16.70 |
| NL68 | M68 |
| 71.1 | 100.0 | 9.5 | 1 | 28.19 |
| NL72 | M72 |
| 75.1 | 105.0 | 9.5 | 1 | 30.70 |
| NL76 | M76 | 3" | 79.1 | 110.0 | 9.5 | 1 | 33.31 |
| NL80 | M80 | 3 1/8" | 83.1 | 115.0 | 9.5 | 1 | 36.02 |
| NL85 | M85 |
| 88.1 | 120.0 | 9.5 | 1 | 37.84 |
| NL90 | M90 |
| 92.4 | 130.0 | 9.5 | 1 | 47.70 |
| NL95 | M95 |
| 97.4 | 135.0 | 9.5 | 1 | 49.80 |
| NL100 | M100 | 4" | 103.4 | 145.0 | 9.5 | 1 | 58.90 |
| NL105 | M105 |
| 108.4 | 150.0 | 9.5 | 1 | 61.30 |
| NL110 | M110 |
| 113.4 | 155.0 | 9.5 | 1 | 63.60 |
| NL115 | M115 |
| 118.4 | 165.0 | 9.5 | 1 | 75.30 |
| NL120 | M120 |
| 123.4 | 170.0 | 9.5 | 1 | 77.90 |
| NL125 | M125 |
| 128.4 | 173.0 | 9.5 | 1 | 76.60 |
| NL130 | M130 | 5" | 133.4 | 178.0 | 9.5 | 1 | 79.20 |
