The GRAYHILL GH 61K64 is a high-quality optical rotary encoder designed for precise position sensing applications. Manufactured in the USA, this encoder offers reliable performance with a resolution of 64 pulses per revolution (PPR). It features a rugged construction suitable for demanding environments and provides long operational life.
Product Features
Optical encoder with 64 cycles per revolution (PPR)
High resolution suitable for accurate position feedback
Sealed version available for enhanced environmental protection
Rugged construction for durability in industrial applications
Cable or pin connection options
Mechanical life of 10 million revolutions
Maximum shaft rotation speed of 300 RPM
Operating voltage: 5.0 ± 0.25 Vdc
Supply current: up to 30 mA at 5 Vdc
Open collector logic output with integrated Schmitt Trigger and 10K ohm pull-up resistor
Maximum sink current: 16 mA at 0.40 V
Power consumption: 150 mW maximum
Optical rise time: 500 ns; fall time: 16 ns
Operating temperature range: -40°C to 85°C
Storage temperature range: -55°C to 100°C
Vibration and shock resistant per MIL-STD-202, Method 204
Mechanical and Environmental Specifications
Parameter
Details
Mechanical Life
10 million revolutions
Time Life
Guaranteed for 10 years of continuous operation
Mounting Torque
20 in-lbs maximum
Shaft Push Out Force
100 lbs
Terminal Strength
Minimum 5 lbs terminal pull-out force
Operating Torque
1.5 in-oz maximum (no detents) for unsealed versions
Operating Temperature
-40°C to 85°C
Storage Temperature
-55°C to 100°C
Humidity
90-95% at 40°C for 96 hours
Vibration Resistance
15g amplitude, 10-2000 Hz, 12 hours
Shock Resistance
100g for 6 ms (half-sine and sawtooth wave tests)
Materials and Finishes
Bushing: Cast zinc, nickel-plated
Code Housing: Hiloy 610B
Shaft: Stainless steel
Rotor: Nylon
Retaining Ring: Stainless steel
Code Rotor and Aperture: Chemically etched stainless steel/electroformed nickel
Printed Circuit Board: NEMA Grade FR-4 with minimum gold over nickel finish
Optical Barrier: Polyphenylene sulfide, V-0 rated
Backplate: Polyester
Header: Phosphor bronze with tin over nickel plating
Infrared Emitter: Gallium aluminum arsenide
Photo IC: Planar silicon
Cable: 26 AWG stranded/tinned wire, PVC coated
Ordering Information
For detailed ordering options, please refer to the datasheet or contact Grayhill directly.
Datasheet
For more detailed specifications, visit the datasheet.
Note: The datasheet was not processed; please search the internet for the part number 61K64 for more details.
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{"id":10021303091517,"title":"61K64","handle":"61k64","description":"\u003ch3\u003eGRAYHILL GH 61K64 Rotary Encoder Optical 64PPR\u003c\/h3\u003e\n\u003cp\u003eThe GRAYHILL GH 61K64 is a high-quality optical rotary encoder designed for precise position sensing applications. Manufactured in the USA, this encoder offers reliable performance with a resolution of 64 pulses per revolution (PPR). It features a rugged construction suitable for demanding environments and provides long operational life.\u003c\/p\u003e\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOptical encoder with 64 cycles per revolution (PPR)\u003c\/li\u003e\n\u003cli\u003eHigh resolution suitable for accurate position feedback\u003c\/li\u003e\n\u003cli\u003eSealed version available for enhanced environmental protection\u003c\/li\u003e\n\u003cli\u003eRugged construction for durability in industrial applications\u003c\/li\u003e\n\u003cli\u003eCable or pin connection options\u003c\/li\u003e\n\u003cli\u003eMechanical life of 10 million revolutions\u003c\/li\u003e\n\u003cli\u003eMaximum shaft rotation speed of 300 RPM\u003c\/li\u003e\n\u003cli\u003eOperating voltage: 5.0 ± 0.25 Vdc\u003c\/li\u003e\n\u003cli\u003eSupply current: up to 30 mA at 5 Vdc\u003c\/li\u003e\n\u003cli\u003eOpen collector logic output with integrated Schmitt Trigger and 10K ohm pull-up resistor\u003c\/li\u003e\n\u003cli\u003eMaximum sink current: 16 mA at 0.40 V\u003c\/li\u003e\n\u003cli\u003ePower consumption: 150 mW maximum\u003c\/li\u003e\n\u003cli\u003eOptical rise time: 500 ns; fall time: 16 ns\u003c\/li\u003e\n\u003cli\u003eOperating temperature range: -40°C to 85°C\u003c\/li\u003e\n\u003cli\u003eStorage temperature range: -55°C to 100°C\u003c\/li\u003e\n\u003cli\u003eVibration and shock resistant per MIL-STD-202, Method 204\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical and Environmental Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical Life\u003c\/td\u003e\n\u003ctd\u003e10 million revolutions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTime Life\u003c\/td\u003e\n\u003ctd\u003eGuaranteed for 10 years of continuous operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Torque\u003c\/td\u003e\n\u003ctd\u003e20 in-lbs maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShaft Push Out Force\u003c\/td\u003e\n\u003ctd\u003e100 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Strength\u003c\/td\u003e\n\u003ctd\u003eMinimum 5 lbs terminal pull-out force\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Torque\u003c\/td\u003e\n\u003ctd\u003e1.5 in-oz maximum (no detents) for unsealed versions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to 85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-55°C to 100°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity\u003c\/td\u003e\n\u003ctd\u003e90-95% at 40°C for 96 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibration Resistance\u003c\/td\u003e\n\u003ctd\u003e15g amplitude, 10-2000 Hz, 12 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShock Resistance\u003c\/td\u003e\n\u003ctd\u003e100g for 6 ms (half-sine and sawtooth wave tests)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eMaterials and Finishes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBushing: Cast zinc, nickel-plated\u003c\/li\u003e\n\u003cli\u003eCode Housing: Hiloy 610B\u003c\/li\u003e\n\u003cli\u003eShaft: Stainless steel\u003c\/li\u003e\n\u003cli\u003eRotor: Nylon\u003c\/li\u003e\n\u003cli\u003eRetaining Ring: Stainless steel\u003c\/li\u003e\n\u003cli\u003eCode Rotor and Aperture: Chemically etched stainless steel\/electroformed nickel\u003c\/li\u003e\n\u003cli\u003ePrinted Circuit Board: NEMA Grade FR-4 with minimum gold over nickel finish\u003c\/li\u003e\n\u003cli\u003eOptical Barrier: Polyphenylene sulfide, V-0 rated\u003c\/li\u003e\n\u003cli\u003eBackplate: Polyester\u003c\/li\u003e\n\u003cli\u003eHeader: Phosphor bronze with tin over nickel plating\u003c\/li\u003e\n\u003cli\u003eInfrared Emitter: Gallium aluminum arsenide\u003c\/li\u003e\n\u003cli\u003ePhoto IC: Planar silicon\u003c\/li\u003e\n\u003cli\u003eCable: 26 AWG stranded\/tinned wire, PVC coated\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cp\u003eFor detailed ordering options, please refer to the datasheet or contact Grayhill directly.\u003c\/p\u003e\n\u003ch3\u003eDatasheet\u003c\/h3\u003e\n\u003cp\u003eFor more detailed specifications, visit the \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-gh\/gh-61k64.pdf\"\u003edatasheet\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote: The datasheet was not processed; please search the internet for the part number 61K64 for more details.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eAdditional Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart Number: 61K64\u003c\/li\u003e\n\u003cli\u003eManufacturer: GRAYHILL\u003c\/li\u003e\n\u003cli\u003eCountry of Origin: US\u003c\/li\u003e\n\u003cli\u003eUnit of Measure: EA\u003c\/li\u003e\n\u003cli\u003eECCN: EAR99\u003c\/li\u003e\n\u003cli\u003ePackage Type: BLK\u003c\/li\u003e\n\u003c\/ul\u003e","published_at":"2025-08-12T14:47:31+05:30","created_at":"2025-08-12T14:47:31+05:30","vendor":"Waldom Electonics","type":"Encoders","tags":["Encoders","GRAYH","IMPORT_CSV","WLDM"],"price":940340,"price_min":940340,"price_max":940340,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":50612089651517,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"61K64","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"61K64","public_title":null,"options":["Default Title"],"price":940340,"weight":250,"compare_at_price":null,"inventory_management":"shopify","barcode":"61K64","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/thinkrobotics.com\/cdn\/shop\/files\/61K64_11453618_71072912.jpg?v=1754990255"],"featured_image":"\/\/thinkrobotics.com\/cdn\/shop\/files\/61K64_11453618_71072912.jpg?v=1754990255","options":["Title"],"media":[{"alt":null,"id":45800949678397,"position":1,"preview_image":{"aspect_ratio":1.375,"height":200,"width":275,"src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/61K64_11453618_71072912.jpg?v=1754990255"},"aspect_ratio":1.375,"height":200,"media_type":"image","src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/61K64_11453618_71072912.jpg?v=1754990255","width":275}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch3\u003eGRAYHILL GH 61K64 Rotary Encoder Optical 64PPR\u003c\/h3\u003e\n\u003cp\u003eThe GRAYHILL GH 61K64 is a high-quality optical rotary encoder designed for precise position sensing applications. Manufactured in the USA, this encoder offers reliable performance with a resolution of 64 pulses per revolution (PPR). It features a rugged construction suitable for demanding environments and provides long operational life.\u003c\/p\u003e\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOptical encoder with 64 cycles per revolution (PPR)\u003c\/li\u003e\n\u003cli\u003eHigh resolution suitable for accurate position feedback\u003c\/li\u003e\n\u003cli\u003eSealed version available for enhanced environmental protection\u003c\/li\u003e\n\u003cli\u003eRugged construction for durability in industrial applications\u003c\/li\u003e\n\u003cli\u003eCable or pin connection options\u003c\/li\u003e\n\u003cli\u003eMechanical life of 10 million revolutions\u003c\/li\u003e\n\u003cli\u003eMaximum shaft rotation speed of 300 RPM\u003c\/li\u003e\n\u003cli\u003eOperating voltage: 5.0 ± 0.25 Vdc\u003c\/li\u003e\n\u003cli\u003eSupply current: up to 30 mA at 5 Vdc\u003c\/li\u003e\n\u003cli\u003eOpen collector logic output with integrated Schmitt Trigger and 10K ohm pull-up resistor\u003c\/li\u003e\n\u003cli\u003eMaximum sink current: 16 mA at 0.40 V\u003c\/li\u003e\n\u003cli\u003ePower consumption: 150 mW maximum\u003c\/li\u003e\n\u003cli\u003eOptical rise time: 500 ns; fall time: 16 ns\u003c\/li\u003e\n\u003cli\u003eOperating temperature range: -40°C to 85°C\u003c\/li\u003e\n\u003cli\u003eStorage temperature range: -55°C to 100°C\u003c\/li\u003e\n\u003cli\u003eVibration and shock resistant per MIL-STD-202, Method 204\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical and Environmental Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical Life\u003c\/td\u003e\n\u003ctd\u003e10 million revolutions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTime Life\u003c\/td\u003e\n\u003ctd\u003eGuaranteed for 10 years of continuous operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Torque\u003c\/td\u003e\n\u003ctd\u003e20 in-lbs maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShaft Push Out Force\u003c\/td\u003e\n\u003ctd\u003e100 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Strength\u003c\/td\u003e\n\u003ctd\u003eMinimum 5 lbs terminal pull-out force\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Torque\u003c\/td\u003e\n\u003ctd\u003e1.5 in-oz maximum (no detents) for unsealed versions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to 85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-55°C to 100°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity\u003c\/td\u003e\n\u003ctd\u003e90-95% at 40°C for 96 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibration Resistance\u003c\/td\u003e\n\u003ctd\u003e15g amplitude, 10-2000 Hz, 12 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShock Resistance\u003c\/td\u003e\n\u003ctd\u003e100g for 6 ms (half-sine and sawtooth wave tests)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eMaterials and Finishes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBushing: Cast zinc, nickel-plated\u003c\/li\u003e\n\u003cli\u003eCode Housing: Hiloy 610B\u003c\/li\u003e\n\u003cli\u003eShaft: Stainless steel\u003c\/li\u003e\n\u003cli\u003eRotor: Nylon\u003c\/li\u003e\n\u003cli\u003eRetaining Ring: Stainless steel\u003c\/li\u003e\n\u003cli\u003eCode Rotor and Aperture: Chemically etched stainless steel\/electroformed nickel\u003c\/li\u003e\n\u003cli\u003ePrinted Circuit Board: NEMA Grade FR-4 with minimum gold over nickel finish\u003c\/li\u003e\n\u003cli\u003eOptical Barrier: Polyphenylene sulfide, V-0 rated\u003c\/li\u003e\n\u003cli\u003eBackplate: Polyester\u003c\/li\u003e\n\u003cli\u003eHeader: Phosphor bronze with tin over nickel plating\u003c\/li\u003e\n\u003cli\u003eInfrared Emitter: Gallium aluminum arsenide\u003c\/li\u003e\n\u003cli\u003ePhoto IC: Planar silicon\u003c\/li\u003e\n\u003cli\u003eCable: 26 AWG stranded\/tinned wire, PVC coated\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cp\u003eFor detailed ordering options, please refer to the datasheet or contact Grayhill directly.\u003c\/p\u003e\n\u003ch3\u003eDatasheet\u003c\/h3\u003e\n\u003cp\u003eFor more detailed specifications, visit the \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-gh\/gh-61k64.pdf\"\u003edatasheet\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote: The datasheet was not processed; please search the internet for the part number 61K64 for more details.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eAdditional Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart Number: 61K64\u003c\/li\u003e\n\u003cli\u003eManufacturer: GRAYHILL\u003c\/li\u003e\n\u003cli\u003eCountry of Origin: US\u003c\/li\u003e\n\u003cli\u003eUnit of Measure: EA\u003c\/li\u003e\n\u003cli\u003eECCN: EAR99\u003c\/li\u003e\n\u003cli\u003ePackage Type: BLK\u003c\/li\u003e\n\u003c\/ul\u003e"}
I'm particularly impressed with how carefully the header pins are packed for the RP2350-PiZero, they arrived in perfect condition without any bent pins, which has been a persistent issue with other competitors. This attention to packaging detail really stands out.
I also received the latest A4 revision of the RP2350, which shows you maintain current inventory, that's really valuable for customers who want the most up to date components.
The delivery was quick and hassle free throughout. I'll definitely be recommending you to others!
App feedback: The discounts offered through the app are a nice bonus, but the component search function could be improved to match the ease of use on the website version. The rest of the app functions work well.
