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| MRRA Precision Locknut (Radial Locking)： |
| The setscrews of locknut intersect a 90° angle with axis which drive the locking brass perfectly stuck on the thread of shaft. |
| ‧No thrust washer or keyway needed. |
| ‧Easy to assemble and disassemble. |
| ‧Can be re-used if handled properly. |
| ‧The series locknut is designed for special area in where space is limited. |
| ‧The connecting face and thread area are all produced by high precision grinding process. |
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NIKKI Product Spec:
| TYPE | Dimensions | Screw | Screw Torque | |||||
| d0 | D | h | g | t | d | DIN | MAX kg-cm | |
| MRRA15/32 | M15X1.0P | 32 | 20 | 4 | 2 | 27 | M5 | 48 |
| MRRA17/38 | M17X1.0P | 38 | 5 | 33 | ||||
| MRRA20/38 | M20X1.0P | 38 | 33 | |||||
| MRRA20/38 | M20X1.5P | 38 | 33 | |||||
| MRRA20/52 | M20X1.0P | 52 | 25 | 47 | ||||
| MRRA20/52 | M20X1.5P | 52 | 47 | |||||
| MRRA25/45 | M25X1.5P | 45 | 20 | 40 | M6 | 80 | ||
| MRRA25/58 | M25X1.5P | 58 | 24 | 6 | 2.5 | 52 | ||
| MRRA30/52 | M30X1.5P | 52 | 22 | 5 | 2 | 47 | ||
| MRRA30/65 | M30X1.5P | 65 | 30 | 6 | 2.5 | 59 | ||
| MRRA35/58 | M35X1.5P | 58 | 22 | 52 | ||||
| MRRA35/70 | M35X1.5P | 70 | 30 | 64 | ||||
| MRRA40/62 | M40X1.5P | 62 | 22 | 56 | M8 | 190 | ||
| MRRA40/75 | M40X1.5P | 75 | 30 | 69 | ||||
| MRRA45/68 | M45X1.5P | 68 | 24 | 62 | ||||
| MRRA45/85 | M45X1.5P | 85 | 32 | 7 | 3 | 78 | ||
| MRRA50/75 | M50X1.5P | 75 | 25 | 6 | 2.5 | 68 | ||
| MRRA50/92 | M50X1.5P | 92 | 32 | 8 | 3.5 | 84 | ||
| MRRA55/98 | M55X2.0P | 98 | 90 | |||||
| MRRA60/98 | M60X2.0P | 98 | 90 | |||||
| MRRA65/105 | M65X2.0P | 105 | 97 | |||||
| MRRA70/110 | M70X2.0P | 110 | 35 | 102 | ||||
| MRRA75/125 | M75X2.0P | 125 | 38 | 117 | ||||
| MRRA80/120 | M80X2.0P | 120 | 35 | 10 | 4 | 105 | ||
| MRRA90/130 | M90X2.0P | 130 | 38 | 120 | ||||
| MRRA90/155 | M90X2.0P | 155 | 146 | |||||
| MRRA100/140 | M100X2.0P | 140 | 12 | 5 | 128 | M10 | 360 | |
| MRRA110/180 | M110X2.0P | 180 | 40 | 14 | 6 | 167 | ||
| MRRA130/210 | M130X2.0P | 210 | 16 | 7 | 205 | |||
| MRRA150/230 | M150X2.0P | 230 | 42 | 18 | 8 | 215 | M12 | 560 |