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MN1620

Supplemental Instructions for the Installation, Operation and Maintenance of

ATEX Approved Torque-Arm II Shaft Mount Reducers (Zone 1) Sizes TA0107 - TA12608

Preface

The products described in this manual are manufactured by Dodge Industrial, a member of RBC Bearings Incorporated, Simpsonville, 

SC 29681 USA. 
This manual is intended to provide basic information on the safe operation and maintenance of ATEX approved Torque-Arm II shaft 

mount reducers. These instructions do not cover all details or variations in equipment not provide every possible contingency or 

hazard to be met in connection with installation, operation and maintenance. Should further information be desired or should particular 

problems arise which are not covered in the manual, the matter should be referred to your local Dodge Industrial representative.
The reducer was manufactured under the guidelines of the ATEX directive 2014/34/EU.
Torque-Arm II reducers are suitable for ATEX Category M2 for Group I and Category 2 for Group II, both gas and dust atmospheres 

where the ignition temperature e135°C (T4) or +275°F.
Typical reducer marking is contained on a certificate plate similar to the following:

Attention - Hazardous Area Use 

For Hazardous Area Use, the following potential ignition hazards have been identified:

• 

Impact to outer enclosure

• 

Heat generation

• 

Contact of rotating parts with stationery parts

The installation should be in accordance with the conditions in the following sections.

NOTE: The reducer is designed to operate with a surface temperature at or below 200°F. Failure to operate the reducer 

properly can cause this maximum surface temperature to be exceeded. If applied in a Division I or Zone I environment this 

excessive temperature may cause ignition of hazardous materials.

The use of supplemental cooling devices such as a shaft-mounted cooling fan or heat exchanger may be required to ensure operating 

temperature below 200°F if indicated by catalog selection tables or if the reducer is operated at ambient temperatures above 80°F. 

Proper use of supplemental cooling, if provided, and avoidance of undesirable operating conditions is required.

Abnormal Conditions

Operating the reducer under any of the following conditions can cause higher than normal operating temperatures:
1.  Reducer load exceeding nameplate ratings

2.  Ambient temperatures above nameplate rating

3.  Inadequate cooling

4.  Operation above maximum nameplate speed

5.  Insufficient amount or improper type of lubricant

Additional Instructions for Safe Installation and Use

Do not open reducer when an explosive atmosphere may be present.

• 

All rotating parts should be guarded to prevent contact with foreign objects which could result in sparks and ignition.

• 

The reducer should be periodically inspected for proper oil level, signs of oil leakage, and dust or dirt buildup that would impede heat 

dissipation.

• 

Follow lubrication instructions and service schedule in this manual. Use gear lubricant with flash point temperature 300°F or higher.

• 

Increasing levels of vibration and noise could indicate the need for repair or replacement of the reducer, including replacement of 

bearings.

• 

Electrical sparks are a source of ignition. To reduce this risk, proper electrical bonding and grounding are recommended. Under 

standard operating conditions, the reducer is electrically bonded to the driven equipment through the output shaft connection.

TORQUE-ARM II METRIC SPEED REDUCER

PART
NUMBER

USA PATENTS

6,253,640

RATIO

KW AT

INPUT RPM

OIL QTY

LITERS

RATING

CLASS I

6,272,941

6,375,196

6,530,138

6,527,276

6,599,052

5,951,198    

Tamb -30°C to +50°C

MFG. BY BALDOR ELEC CO/FT SMITH, AR 72901 USA

I M2 ck / II 2 GD ck T4

SIRA 04 ATEX 9360

R

6,202,507

5,667,333

MAX

POS. B

WARNING 

an explosive atmosphere

may be present

Do not open when

SERVICE PER INSTRUCTION MANUAL

ME

MB E R OF

Summary of Contents for Ratios 15

Page 1: ...reducer housing as installed If space is restricted on the upper face install the vent in the highest hole on the side of the reducer per Figure 1 Install a plug in the hole in the bottom face of the...

Page 2: ...ghtening the V belt with the torque arm 6 Install torque arm and adapter plates reusing the reducer bolts The adapter plates will fit in any position around the input end reducer 7 Install torque arm...

Page 3: ...ning rings and necessary shaft key or keys The driven shaft does not need to extend through the reducer for the short shaft bushing to operate properly The minimum shaft length as measured from the en...

Page 4: ...ighten screws lightly 11 Alternately and evenly tighten the screws in the bushing nearest the equipment to the recommended torque given in Table 1 Repeat procedure on outer bushing Straight Bore Reduc...

Page 5: ...ion Table2 OilVolumesbyMountingPosition CaseSize Ratios OilVolumeinLiters Horizontal Vertical A 9 00 B 6 00 C 3 00 D 12 00 E Up F Down TA0107L Single 0 6 0 5 0 6 1 3 1 2 1 4 Doubles 0 6 0 5 0 6 1 3 1...

Page 6: ...0 220 220 150 150 150 150 150 150 150 150 150 126 150 220 220 220 150 150 150 150 150 150 150 150 150 101 125 220 220 220 220 150 150 150 150 150 150 150 150 81 100 220 220 220 220 220 150 150 150 150...

Page 7: ...ent 4 The instruction manuals and lubrication tags are paper and must be kept dry Either remove these documents and store them inside or cover the unit with a durable waterproof cover which can keep m...

Page 8: ...600 800 1000 1500 2000 3000 4000 5000 6000 8000 10 000 cSt 40 C 100 C cSt ISO VG AGMA GRADES GRADES GEAR OILS SUS 100 F SUS 210 F SAE KINEMATIC VISCOSITIES SAYBOLT VISCOSITIES 200 300 100 90 80 70 60...

Page 9: ...nstallation damage can occur to the shaft and or the backstop Slide the race against the spacer or the shaft shoulder and install the retaining ring into the groove in the shaft Only use the supplied...

Page 10: ...embly is securely installed on the input shaft 4 Recheck fan assembly for proper location and clearance Loosen set screws and repeat steps 2 and 3 above if not properly located Installation for TA6307...

Page 11: ...ingBolt 4 4 411294 411294 411294 411294 411294 411294 FanSetScrew 5 2 299812 299812 299812 299812 299812 299812 CoverBolt 6 4 304519 304519 304519 304519 304519 304519 Lockwasher 7 4 304602 304602 304...

Page 12: ...tions Motor Mount Installation WARNING To ensure that drive is not unexpectedly started turn off and lock out or tag power source before proceeding Remove all external loads from drive before removing...

Page 13: ...1 482 590 491 600 501 610 513 621 533 641 561 669 B M1 373 483 381 491 390 500 400 510 410 520 422 532 442 552 470 580 M2 439 549 447 557 456 566 466 576 476 586 488 598 508 618 536 646 M3 505 614 513...

Page 14: ...5 754 855 766 867 786 886 813 914 833 934 853 954 B M1 566 668 576 678 586 688 598 700 618 720 646 748 666 768 686 788 M2 671 773 681 783 691 793 703 805 723 825 751 853 771 873 791 893 M3 775 878 785...

Page 15: ...75 1276 1194 1296 1214 1316 1239 1341 1264 1366 N A N A B M1 762 863 789 890 809 910 829 930 853 954 878 979 N A N A M2 912 1013 940 1041 960 1061 980 1081 1004 1106 1029 1131 N A N A M3 1063 1165 109...

Page 16: ...A N A N A N A N A N A N A N A N A N A N A N A N A N A B M1 1188 1284 1208 1304 1228 1324 1253 1349 1278 1374 1308 1404 N A N A M2 1324 1420 1344 1440 1364 1460 1389 1485 1414 1510 1444 1540 N A N A M...

Page 17: ...otor shaft and reducer input shaft The long slot in the back cover fits over the motor shaft 4 Align the back cover assembly to the Torque Arm II motor mount and attach using four cap screws washers a...

Page 18: ...o specifications in Table 11 DRIVESHAFT REMOVAL To remove the driveshaft from the reducer the following steps are required 1 Remove the driveshaft retaining bolt 404 and lock washer 405 the keeper pla...

Page 19: ...and pinion are integral Press gear and bearings on shaft Press against inner race not cage or rollers of bearings 3 Input Shaft Assembly Shaft and pinion are integral Press bearings on shaft Press ag...

Page 20: ...TA7315HM M16 2 70 110 125 TA8407HM M16 2 70 110 125 TA9415HM M16 2 70 110 125 TA10507HM M20 2 5 70 180 200 TA12608HM M20 2 5 70 180 200 BackstopCoverBoltRecommendedTorqueValues ReducerSize FastenerSiz...

Page 21: ...304753 40 1 403094 304707 TA3203HM 5 1 9 1 15 1 25 1 304809 411626 05 K 40 1 403101 402271 TA4207HM 5 1 9 1 15 1 25 1 40 1 304809 411626 05 K TA5215HM 5 1 9 1 15 1 403005 402001 25 1 40 1 403005 3047...

Page 22: ...3 25 1 905124 905130 40 1 905125 905131 TA6307HM 5 1 906126 906120 906128 9 1 906122 906129 15 1 906123 25 1 906124 906130 40 1 906125 TA7315HM 5 1 907126 907120 907128 9 1 907122 907129 15 1 907123 2...

Page 23: ...1 112 600 100 31 33 11 12 9 18 22 13 45 30 32 29 28 OPTIONAL BACKSTOP ASSEMBLY TORQUE ARM ASSEMBLY 10 34 36 41 44 14 24 25 21 40 39 35 37 204 205 201 202 203 200 38 27 26 23 4 5 6 7 15 16 1 2 102 SCRE...

Page 24: ...3 45 30 32 OPTIONAL BACKSTOP ASSEMBLY 10 44 14 21 26 4 5 6 7 15 16 1 106 108 109 110 101 104 103 105 107 111 112 100 29 28 TORQUE ARM ASSEMBLY 24 25 204 205 201 202 203 200 27 23 2 102 SCREW CONVEYOR...

Page 25: ...3268 905272 23 Output Gear 1 900208 901208 902208 903208 904208 905208 26 Output Hub Tapered Bore 1 900230 901230 902230 903230 904230 905230 Output Hub Straight Bore 1 900231 901231 902231 903231 904...

Page 26: ...1 304833 403165 304836 403101 304809 403005 36 Counter Shaft Bearing Cone LH 1 304740 402265 411626 05 B 402271 304710 402001 37 Counter Shaft Bearing Cone RH 1 304740 402265 411626 05 B 402271 30471...

Page 27: ...06273 906273 908269 909269 909265 912269 005 Shim 13mm 906272 906272 908268 909268 904264 912268 23 Output Gear 1 906208 907208 908208 909208 910208 912208 26 Output Hub Tapered Bore 1 906230 907230 9...

Page 28: ...34 Counter Shaft Bearing Cup LH 1 403026 403159 411626 06 BE 403036 403087 402233 35 Counter Shaft Bearing Cup RH 1 403026 403159 411626 06 BE 403036 403087 402233 36 Counter Shaft Bearing Cone LH 1 9...

Page 29: ...9 103 15 619 25 067 33 333 TA3203HM 4 913 9 234 15 067 24 954 32 451 TA4207HM 5 000 9 231 15 000 25 125 39 107 TA5215HM 5 105 9 183 14 923 24 996 38 907 TA6307HM 4 944 9 215 15 451 24 868 38 319 TA73...

Page 30: ...devices such as a shaft mounted cooling fan or heat exchanger may be required to ensure operating temperature below 200 F if indicated by catalog selection tables or if the reducer is operated at amb...

Page 31: ...31 MN1620...

Page 32: ...Dodge Industrial Inc 1061 Holland Road Simpsonville SC 29681 1 864 297 4800 All Rights Reserved Printed in USA MN1620 02 22 1620 0222 DODGE INDUSTRIAL INC AN RBC BEARINGS COMPANY...

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