Right-angle Worm Gearboxes

ej-worm-gearboxsEJ Series variants, worm gear family

NIDEC-SHIMPO has been at the forefront of developing gear technology to fulfill the requirements of our OEM customers. Our close partnerships with our installed customer base provided much insight into their evolving need for more high-precision right-angle gearing options. In order to fill that need, NIDEC-SHIMPO offers a full line of high-precision worm gearboxes, known as our EJ Series.

These servo grade gearheads are ideal for the most dynamic cyclical or continuous motion control applications. Each series incorporates a globoidal worm gear mesh design in order to achieve the torque handling capacity, shock load capability and level of precision that our customers have come to expect from us. Experience the ultimate in flexibility with multiple backlash options and several mounting configurations to get into the tightest spaces. We can customize these units even further to satisfy a variety of applications and operating environments.

Advantages of the EJ SERIES platform design

  • Quiet operation, in comparison to traditional worm gearing products
  • High shock load capacity, using oversized tapered roller bearings
  • Absolute zero backlash available
  • Wide range of output mounting options – Solid, hollow, dual shaft, shrink disc, ISO flange
  • Compact, lightweight construction
  • Exact gear reduction ratios for simplified system tuning
  • Optimized mounting interface for virtually any motor
  • Maintenance free, lubricated for life

 
 

EJ Series, Summary Level Table

Product Series EJM EJL EJH EJP EJS
Economy Class Performance Class Heavy Industrial Class High Precision Class Hygienic Class
ejm_s ejm_s ejh_s ejp ejp
Series Features Globoidal worm gear mesh

Economy leader of category

Aluminum housing

Conventional precision range

Best price – performance ratio

Multiple output options

Aluminum/cast iron housing

Three backlash levels

Globoidal worm gear mesh

Strong internal structure

Robust cast iron housing

Low backlash option

Globoidal worm gear mesh

Zero backlash option

Optimal sound characteristics

Performance leader of category

Globoidal worm gear mesh

IP69K rated aseptic design

316 stainless with food grade oil

Various output options

Frame Size Variety: 6 Variety: 11 Variety: 5 Variety: 6 Variety: 5
Reduction Ratios 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60 3.125, 5.2, 7.25, 10.25, 14.5, 15.25, 19.5, 20.5, 29.5, 30, 45, 60, 90 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 40, 50, 60 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 40, 50, 60 5, 7, 10, 15, 20, 25, 30, 40, 50, 60
Nominal Output Torque (Nm) 29 – 505 8 – 3788 35 – 475 35 – 480 41 – 396
Maximum Acceleration Torque (Nm) 33 – 614 13 – 6250 46 – 663 46 – 660 47 – 721
Max. Input speed (rpm) 4000 6000 4000 6000 3000
Backlash (Arc-min) 12 – 41 0.5 – 10 6 – 32 0 – 24 4 – 24
Output Hollow Bore Size (mm) ø25.4 – 74.6 ø14 – 100 ø25 – 60 ø25 – 60 ø19 – 35