{"id":1539,"date":"2026-05-05T05:10:21","date_gmt":"2026-05-05T05:10:21","guid":{"rendered":"https:\/\/wormreducers.xyz\/?p=1539"},"modified":"2026-05-05T05:10:21","modified_gmt":"2026-05-05T05:10:21","slug":"worm-gear-reducer-catalogue-codes-decoded-nmrv-wp-sk-scws","status":"publish","type":"post","link":"https:\/\/wormreducers.xyz\/ja\/worm-gear-reducer-catalogue-codes-decoded-nmrv-wp-sk-scws\/","title":{"rendered":"\u30a6\u30a9\u30fc\u30e0\u30ae\u30a2\u6e1b\u901f\u6a5f\u30ab\u30bf\u30ed\u30b0\u30b3\u30fc\u30c9\u306e\u89e3\u8aad\uff1aNMRV\/WP\/SK\/SCWS"},"content":{"rendered":"
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\u30a6\u30a9\u30fc\u30e0\u30ae\u30a2\u6e1b\u901f\u6a5f\u30ab\u30bf\u30ed\u30b0\u30b3\u30fc\u30c9\u306e\u89e3\u8aad\uff1aNMRV\/WP\/SK\/SCWS<\/h1>\n

A practical decoder for the four major catalogue families \u2014 Italian NMRV, Chinese WP, German Nord SK, Japanese Mitsubishi SCWS \u2014 with frame size translation, suffix codes, and the decoding mistakes that cause specification errors.<\/p>\n

Get a Catalogue Cross-Reference Quote \u2192<\/a><\/p>\n<\/div>\n<\/div>\n

A worm gear reducer catalogue code looks compact on the nameplate \u2014 usually 8 to 14 characters separating family, frame size, ratio, mounting class and accessories. The same physical specification carries radically different codes between Italian NMRV, Chinese WP, German Nord SK and Japanese Mitsubishi SCWS catalogues. Procurement engineers managing mixed-vintage and mixed-brand installed bases need to translate fluently in both directions: from a legacy nameplate to a modern equivalent, and from an engineering specification to the family code each supplier expects. The article below provides the decoder rules for the four major families, a cross-family frame size translation matrix, a suffix code chart, and five mistakes that account for most translation errors.<\/p>\n

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CODE ANATOMY \u2014 TYPICAL NMRV SPECIFICATION<\/p>\n

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NMRV<\/span>075<\/span>4\/100<\/span>71B5<\/span>F<\/span><\/p>\n<\/div>\n

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FAMILY<\/p>\n

NMRV<\/p>\n

Aluminum body, Italian RV pattern<\/p>\n<\/div>\n

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FRAME SIZE<\/p>\n

075<\/p>\n

Centre distance 75 mm<\/p>\n<\/div>\n

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RATIO<\/p>\n

4\/100<\/p>\n

i = 100 (4-start worm)<\/p>\n<\/div>\n

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MOTOR MOUNT<\/p>\n

71B5<\/p>\n

IEC 71B5 motor flange<\/p>\n<\/div>\n

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OUTPUT<\/p>\n

F<\/p>\n

Flange-mount output<\/p>\n<\/div>\n<\/div>\n<\/div>\n

Why Catalogue Codes Matter for Worm Gear Reducer Specification<\/h2>\n

A worm gear reducer catalogue code is the procurement engineer’s primary handle on a specific physical configuration. Get the code right and the supplier ships the matching unit; get it wrong by a single character and the delivered hardware mismatches mounting hole patterns, output shaft diameter, motor flange size or accessory provisions. The cost of a mismatched code is not just the unit value \u2014 it includes shipping back, restocking fees, project schedule slip, and the labour to identify and order the correct replacement.<\/p>\n

Each worm gear reducer catalogue family encodes the same set of engineering attributes \u2014 frame size, ratio, motor mount, output type, accessory pack \u2014 but in different positional and notation conventions. NMRV separates segments with slashes and uses centre-distance frame numbers (the “075” means 75 mm centre distance). WP separates with no delimiters and uses sized model numbers (the “70” in WPA70 means a 70-frame, with no direct millimetre meaning). SK uses two-digit codes (SK 12, SK 22) where the number progresses through the catalogue rather than encoding any single physical dimension. SCWS uses the metric centre distance directly (SCWS 175 means 175 mm centre distance).<\/p>\n

Translating worm gear reducer codes across families means understanding what each segment encodes in each system, then mapping the engineering attribute (not the literal character) to the equivalent character in the target catalogue. The four decoder cards below cover each family in detail.<\/p>\n

NMRV \/ RV \u2014 The European Aluminum Family Decoder<\/h2>\n

The NMRV (Motovario) and RV (generic Italian-pattern) family covers aluminum die-cast worm gear reducer specifications across the small-to-medium frame range. Korean OEMs frequently specify NMRV codes for packaging machinery, food-processing conveyors and light industrial drives. The full worm gear reducer code uses 5 segments separated by slashes, dashes or spaces.<\/p>\n

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PATTERN: NMRV {SIZE} {STARTS}\/{RATIO} – {MOTOR} – {OUTPUT}<\/p>\n