design features & performance Snap-Lock switches have separate enclosures within a single housing for the electrical contacts and terminals on one side and latches, rockers and other parts of the operating mechanism on the other. The patented snap-lock action guarantees a quick-make and quick-break of contacts together with locking in either open or closed position. These tough switches are heavy duty, machine tool type with double pole, double throw, butt type contacts. Enclosures are water, oil and dust tight and meet all NEMA Type 1, 4, and 13 requirements. provide Separate Enclosures for Mechanical and Electrical Sides Electrical side Mechanical Side A C B D DOUBLE POLE DOUBLE TH R O W E G F H E L I Z A B E T H T O W N N C U S A The contacts are positively maintained until the latch CONTACT CONFIGURATION is disengaged by the return travel of the lever to FOR FOR CW CCW reset the switch. The return spring serves to reset SWITCH SWITCH the switch automatically to its original position when A C A C A C A C 1 2 1 2 the force on the operating lever is removed, but with B D D B B D B D the spring removed the operating lever will remain in CIRCUIT CIRCUIT CIRCUIT either position as actuated. E G E G E G E G 3 4 3 4 F H F H F H F H INITIAL CW forM Z INITIAL CCW A Form Z contact arrangement is one which has single-pole double-throw contacts with four The electrical side, completely separated from the terminals, two for normally open and two for normally mechanical side, provides ample wiring space and closed. The function of this arrangement is to open readily accessible terminal screws in the molded one circuit and close the other as needed. contact blocks. The contact lever carries self-wiping silver-alloy contacts and is connected directly by a shaft to the latch bar on the mechanical side. Water, nEMA Standard 11-12-1970 oil and dust-tight enclosures are guaranteed by the use of appropriate gasket materials. N C C 2 C N O 1 26 www.namcocontrols.com rOCKEr TYpE SwiTCHES rOCKEr TYpE limiT SwiTCHES Ea170 2N.O. - 2N.C. C I R C U I T 3 C I R C U I T 1 C I R C U I T 4 C I R C U I T 2 1-800-nAMtEcH rOCKEr TYpE SwiTCHES ® SNap-lOCK Ea170 2 N.O. - 2 N.C. catalog numbering System How to read part numbers Please order Switch and Operating Lever as SEPARATE ITEMS ONLY and use the Ordering Number listed. Refer to Series EL for Operating Levers. EXAMPLE: To order a Standard Snap-Lock Switch and the operating lever considered as standard, use the catalog numbers as follows: • 1 No. EA080-11100 Snap-Lock Switch • 1 No. EL010-53420 Operating Lever Assembly EA170 Series basic Switch Position 6 Position 7 Position 8 Series EA170-11100 Position 9 Standard Position 10 EA170-11105 SEE BELOW } position 6 1 Standard Mounting, Front Shaft 2 Wide Mounting, Front Shaft 3 Long Mounting, Front Shaft 4 Standard Mounting, Reverse Shaft 5 Wide Mounting, Reverse Shaft 6 Long Mounting, Reverse Shaft 7 Standard Mounting, Front and Back Shafts 8 Wide Mounting, Front and Back Shafts Series EA170-14100 9 Long Mounting, Front and Back Shaft 0 Special Short travel position 7 1 CW, Standard Travel 5 CCW Spring and Short Travel 2 CCW, Standard Travel 6 w/o Spring – Short Travel 3 w/o Spring Standard Travel 7 Neutral Position 4 CW Spring and Short Travel 9 Special position 8 1 Standard 4 Tandem 2 Epoxy Sealed Switch 5 Standard Housing, Plastic cover 3 Extreme Environment 9 Special position 9 & 10 Denotes Product Variation Series EA170-41100 reverse Shaft Note: The above chart is designed to help identify an existing model number. It is not intended to be used to select a model number. 27 A D B operational data C Double pole, double break, double CCW CW throw, heavy duty limit switch hav- ing mechanical travel of 10° to trip and with two normally open and two normally closed circuit. Can be supplied with standard, wide or long mounting. direction of rotation A. Trip Travel ....................................... 10° B. Reset Travel ..................................... 8° C. Recommended Travel .................... 13° D. Total Travel .................................... 37° E. Torque to Trip (Inch Lbs.) .............. 23° F. Weight: Approx. ....................... 3.5 Lbs. dimensions and Mounting 2.25 5 /16 18NC 48 SERRATIONS EQUALLY SPACED (57.1) 1.56 .255 / .260 D I A . 1.56 56 DEEP 4 HOLES (39.6) (39.6) .495/.490 O.D. 4 HO L E S 1.56 (39.62) .50 .09 (12.7) .255 / .260 D I A . (2.2) .95 1.03 (24.1) (26.1) 4 HO L E S .44 .94 (11.1) .37 (23.8) (9.3) 1.63 (41.4) .69 (17.5) 4.12 6.58 (104.6) 6.58 6.58 (167.1) (167.1) (167.1) 6.58 3.81 5.62 (167.1) (96.7) (142.7) .12 .81 (3.0) (20.5) .12 .56 .99 (3.0) 3.04 (14.2) .12 (25.1) 2.25 (77.2) (3.0) 2.56 (57.1) .09 (65.0) (2.2) 1 11 1 /2 NPT 3.68 2.87 1.55 (93.4) (72.8) 7 1 /2 THREADS (39.3) 32 R 4.31 (109.4) All dimensions given in US & Metric: Inches (mm) All dimensions given in US & Metric: Inches (mm) Standard Mounting long Mounting Wide Mounting All dimensions given in US & Metric: Inches (mm) ORDERING INFO ORDERING NUMBERS MAINTAINED TYPE MOUNTING ROTATION CW ROTATION CCW (WITHOUT RETURN SPRING) STANDARD MOUNTING EA170-11100 EA170-12100 EA170-13100 WIDE MOUNTING EA170-21100 EA170-22100 EA170-23100 LONG MOUNTING EA170-31100 EA170-32100 EA170-33100 contact configurations F H F H H H F F E G E G G E G E FOR B D B D FOR B D B D CW CCW A C A C A C A C SWITCH SWITCH 28 INITIAL CW INITIAL CCW B A C D www.namcocontrols.com rOCKEr TYpE SwiTCHES rOCKEr TYpE limiT SwiTCHES Ea170 Standard 1-800-nAMtEcH rOCKEr TYpE SwiTCHES ® SNap-lOCK Ea170 2 N.O. - 2 N.C. Specifications Heavy Duty, Machine Tool Type, Double Pole, Continuous Current Rating - Amperes 75-100% Power Factor Double Throw, Quick Make, Quick Break, Butt Type, NEMA Form “Z” Contacts. External Lever is Adjustable by 7˚30’ Volts AC DC Increments thru 167˚ 125 20 5 Enclosure is Water, Oil and Dust Tight. Meets 250 15 1.5 (NEMA) 1, 4, & 13 Requirements. 480 10 600 5 Torque Necessary for Operation of Switch 23 in. lb. (Without Return Spring, Item 23, 10 in. lb.) Ambient Temperature: -20˚C to + 90˚C parts list 13 12 10 8 7 1 2 5 19 4 18 15A 15 23 29 30 3 24 16 28 27 17 14 20 9 6 21 26 22 25 27 28 26 31 ITEM NO. DESCRIPTION QTY. ITEM NO. DESCRIPTION QTY. 1 HOUSING ASSY. 1 17 LEVER (ONLY) 1 2 BUSHING 1 18 TORSION SPRING 1 3 BUSHING 1 19 "O"-RING 1 4 PIPE PLUG 1 20 SPRING 1 5 CONTACT LEVER SHAFT 1 21 ROLLER SLIDE 1 6 CONTACT BLOCK SCREW 4 22 ROLLER 1 7 CONTACT BLOCK ASSEMBLY 1 23 RETURN SPRING 1 8 LEVER 1 24 ROLL PIN 1 9 SEMS SCREW 1 25 ROCKER 1 10 TOP COVER GASKET 1 26 RETAINING CLIP 2 12 TOP COVER 1 27 LATCH SPRING 2 13 TOP COVER SCREW 6 28 LATCH 2 LEVER SHAFT ASSY. (INCLUDES 14 1 29 BOTTOM COVER GASKET 1 ITEMS 15, 15A, 16, 17 & 18) 30 BOTTOM COVER 1 15 SHAFT 1 15A SPRING LEVER 1 16 ROLL PIN 1 31 BOTTOM COVER SCREW 9 29 A D B Operational Data operational data C This heavy duty limit switch CCW CW operates with two normally open and two normally closed circuits, with mechanical travel of less than 6½° required to trip. Can be supplied with with standard, wide or long mounting as required. A. Pre-Travel .................................... 6°30” B. Differential Travel .............................. 4° C. Recommended Travel ....................... 7° D. TotalTravel ...................................... 36° E. Max. Torque During Pre-Travel 32 Lb-In F. Max. Torque at Total Travel ..… 45 Lb-In G. Weight: Approx. ....................... 3.5 Lbs. dimensions and Mounting 2.25 (57.1) 5 /16 18NC 1.56 .56 DEEP 4 HOLES 48 SERRATIONS EQUALLY SPACED 1.56 (39.6) .255 / .260 D I A . (39.6) .495/.490 O.D. 4 HO L E S 1.56 .09 (39.62) .50 (2.2) .95 1.03 (24.1) .255 / .260 D I A . (12.7) (26.1) 4 HO L E S .44 .94 .37 (11.1) (9.3) (23.8) 1.63 (41.4) .69 (17.5) 4.12 (104.6) 6.58 6.58 (167.1) 6.58 (167.1) (167.1) 6.58 3.81 (167.1) (96.7) 5.62 (142.7) .12 .81 (3.0) (20.5) .12 (3.0) .56 .99 3.04 (14.2) (25.1) (77.2) 2.56 .09 3.68 .12 (65.0) 2.25 (2.2) 1 11 1 /2 NPT (93.4) (3.0) (57.1) 1.55 7 1 /2 THREADS 32 R 2.87 (39.3) 4.31 (72.8) (109.4) Standard Mounting Wide Mounting long Mounting All dimensions given in US & Metric: Inches (mm) All dimensions given in US & Metric: Inches (mm) ORDERING INFO ORDERING NUMBERS MAINTAINED TYPE MOUNTING ROTATION CW ROTATION CCW (WITHOUT RETURN SPRING) STANDARD MOUNTING EA170-14100 EA170-15100 EA170-16100 WIDE MOUNTING EA170-24100 EA170-25100 EA170-26100 LONG MOUNTING EA170-34100 EA170-35100 EA170-36100 contact configurations F H F H H F F H E G E G E G E G FOR FOR B D B D B D B D CW CCW A C A C A C A C SWITCH SWITCH 30 INITIAL CW INITIAL CCW B A C D www.namcocontrols.com rOCKEr TYpE SwiTCHES rOCKEr TYpE limiT SwiTCHES Ea170 Short Travel 1-800-nAMtEcH rOCKEr TYpE SwiTCHES ® SNap-lOCK Ea170 2 N.O. - 2 N.C. Specifications Heavy Duty, Machine Tool Type, Double Pole, Continuous Current Rating - Amperes 75-100% Power Factor Double Throw, Quick Make, Quick Break, Butt Type, NEMA Form “Z” Contacts. External Lever is Adjustable by 7˚30’ Volts AC DC Increments thru 167˚ 125 20 5 Enclosure is Water, Oil and Dust Tight. Meets 250 15 1.5 (NEMA) 1, 4, & 13 Requirements. 480 10 600 5 Torque Necessary for Operation of Switch 32 in. lb. (Without Return Spring, Item 23, 10.5 in lb.) Ambient Temperature: -20˚C to + 90˚C parts list 13 12 10 8 7 1 5 2 19 4 18 15A 23 15 28 27 29 30 14 3 22 16 17 9 6 5A 21 27 26 28 26 20 31 ITEM NO. DESCRIPTION QTY. ITEM NO. DESCRIPTION QTY. 1 HOUSING ASSY. 1 16 ROLL PIN 1 2 BUSHING 1 17 LEVER 1 3 BUSHING 1 18 TORSION SPRING 1 4 PIPE PLUG 1 19 "O"-RING 1 5 CONTACT LEVER SHAFT 1 20 TORSION SPRING 1 5A ROLL PIN 1 21 WASHER 1 ROCKER & FLOATING 6 CONTACT BLOCK SCREW 4 22 1 LEVER ASSEMBLY 7 CONTACT BLOCK ASSEMBLY 1 8 LEVER ASSEMBLY 1 23 RETURN SPRING 1 9 SEMS SCREW 1 26 REATAINING CLIP 2 10 TOP COVER GASKET 1 27 LATCH SPRING 2 12 TOP COVER 1 28 LATCH 2 13 TOP COVER SCREW 6 29 BOTTOM COVER GASKET 1 14 LEVER SHAFT ASSY. 1 30 BOTTOM COVER 1 15 LEVER SHAFT 1 15A SPRING LEVER 1 31 BOTTOM COVER SCREW 31 operational data D CW C Designed for applications where a A reverse shaft is essential in opera- B tion. This series provides the same snap locking action of the other series of SNAP-LOCK Switches. Can be supplied with standard, wide or long mounting. (cW operation Shown) Viewed From Top Cover direction of rotation A. Trip Travel ..................................... 10° B. Reset Travel .................................... 8° C. Recommended Travel .................. 13° D. Total Travel .................................. 37° E. Weight:..................... Approx. 3.5 Lbs. dimensions and Mounting 2.25 5 /16 18NC (57.1) 48 SERRATIONS EQUALLY SPACED 1.56 .56 DEEP 4 HOLES (39.6) .495/.490 O.D. 1.56 (39.62) 1.56 .09 .255 / .260 D I A . (2.2) .95 .255 / .260 D I A . (39.6) 1.03 4 HO L E S (24.1) (26.1) 4 HO L E S .50 .94 (23.8) (12.7) .37 (9.3) 1.63 .44 (41.4) (11.1) .69 (17.5) 4.12 (104.6) 6.58 (167.1) 6.58 3.81 6.58 (167.1) (96.7) 6.58 (167.1) (167.1) 5.62 (142.7) .12 .81 (3.0) (20.5) .12 (3.0) .56 .99 3.04 (14.2) (25.1) (77.2) 2.56 3.68 .09 (65.0) (93.4) (2.2) 1 11 1 /2 NPT 32 R .12 1.55 7 1 /2 THREADS 2.25 4.31 (39.3) (3.0) (57.1) (109.4) 2.87 (72.8) Standard Mounting Wide Mounting long Mounting All dimensions given in US & Metric: Inches (mm) All dimensions given in US & Metric: Inches (mm) ORDERING INFO ORDERING NUMBERS MAINTAINED TYPE MOUNTING ROTATION CW ROTATION CCW (WITHOUT RETURN SPRING) STANDARD MOUNTING EA170-41100 EA170-42100 EA170-43100 WIDE MOUNTING EA170-51100 EA170-52100 EA170-53100 LONG MOUNTING EA170-61100 EA170-62100 EA17063100 contact configurations F H F H F H F H E G E G G G E E FOR FOR B D B D B D B D CCW CW C C A C A C A A SWITCH SWITCH 32 INITIAL CW INITIAL CCW www.namcocontrols.com rOCKEr TYpE SwiTCHES rOCKEr TYpE limiT SwiTCHES Ea170 Reverse Shaft 1-800-nAMtEcH rOCKEr TYpE SwiTCHES ® SNap-lOCK Ea170 2 N.O. - 2 N.C. Specifications Heavy Duty, Machine Tool Type, Double Pole, Continuous Current Rating - Amperes 75-100% Power Factor Double Throw, Quick Make, Quick Break, Butt Type, NEMA Form “Z” Contacts. External Lever is Adjustable by 7˚30’ Volts AC DC Increments thru 360˚ 125 20 5 Enclosure is Water, Oil and Dust Tight. Meets (NEMA) 1, 4, & 13 Requirements. 250 15 1.5 480 10 600 5 Torque Necessary for Operation of Switch 30 in. lb. (Without Return Spring, Item 23, 10 in lb.) Ambient Temperature: -20˚C to + 90˚C parts list 13 12 10 8 7 1 2 5 19 15 18 15A 19 23 29 30 3 24 16 28 27 17 4 14 20 9 6 21 26 22 25 27 28 26 31 ITEM NO. DESCRIPTION QTY. ITEM NO. DESCRIPTION QTY. 1 HOUSING ASSY. 1 17 LEVER (ONLY) 1 2 BUSHING 1 18 TORSION SPRING 1 3 BUSHING 1 19 "O"-RING 1 4 PIPE PLUG 1 20 SPRING 1 5 CONTACT LEVER SHAFT 1 21 ROLLER SLIDE 1 6 CONTACT BLOCK SCREW 4 22 ROLLER 1 7 CONTACT BLOCK ASSEMBLY 1 23 RETURN SPRING 1 8 LEVER 1 24 ROLL PIN 1 9 SEMS SCREW 1 25 ROCKER 1 10 TOP COVER GASKET 1 26 RETAINING CLIP 2 12 TOP COVER 1 27 LATCH SPRING 2 13 TOP COVER SCREW 6 28 LATCH 2 LEVER SHAFT ASSY. (INCLUDES 14 1 29 BOTTOM COVER GASKET 1 ITEMS 15, 15A, 16, 17 & 18) 30 BOTTOM COVER 1 15 SHAFT 1 15A SPRING LEVER 1 16 ROLL PIN 1 31 BOTTOM COVER SCREW 9 33