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PS / PSA

PS / PSA

PS / PSA

Product catalog summary
Specifications:
The gears are manufactured to JIS grade N9 and JIS grade 5 standards, with a standard full depth and a pressure angle of 20°. They are made from MC901 material without heat treatment, with a tooth hardness of 115-120 HRR. Dimensions include a face width of 20, hub width of 10, total length of 30, and screw offset of 5, all in Shape S1.
Attachment Procedures:
For light loads, gears can be attached using keys, taper pins, spring pins, and press fitting after mounting setscrews. Steel hubs are recommended for high temperatures and large diameter gears. Fusion bonding with metal cores is suggested for gears that cannot be fastened with bolts.
Product Details:
Bore size is H7 with a keyway of Js9. Various catalog numbers are available for ordering, with specific bore sizes. J Series products require a lead-time for shipping and have specific order quantities and keyway standards.
Cautions:
Secondary operations may affect plastic gears due to temperature and moisture. Allowable torques are based on assumed usage conditions. Without lubrication, plastic gears may generate heat and dilation; mating with steel gears is recommended. Dimensional changes in plastic gears can occur due to temperature or humidity variations.
Additional Information:
Stainless steel hubs for PSA are available. Technical information on gears is accessible on the KHK website. Custom-made gears can be ordered with materials like UHMW-PE and PEEK.
Specifications and Ordering Information:
Products require a lead-time of 2 working days for shipping, excluding the order day. Order quantities range from 1 to 20 units, with quotes needed for larger orders. Keyways are manufactured to JIS B1301 standards with Js9 tolerance. Products with long tapped holes may be counterbored, and those with tapped holes include a set screw. For plastic products, avoid over-tightening screws; use torques less than 0.12N・m for M4 and 0.38N・m for M5.
Product Dimensions and Standards:
Various dimensions are provided for different bore sizes, including 10 to 50. Specific dimensions for tapped holes and tap sizes (M4, M5, M6, M8) are given.
Product Identification:
J Series items are identified by background color, with product codes including PS3 and PSA3 series with various bore sizes.
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Catalog excerpts

PS / PSA-1

Module 1 PS Other Bevel Worm Screw Bevel Miter CP Racks R . Internal Helical Spur Products Gearboxes Gear Pair Gears Gears Gears & Pinions ac s Gears Gears Gears * The precision grade of J Series products is equivalent to the value shown in the table. [Caution on Product Characteristics] © Significant variations in temperature or humidity can cause dimensional changes in plastic gears (MC Nylon gears), including bore size (H8 when produced), tooth diameter, and backlash. Please see the section "Design of Plastic Gears" in separate technical reference book. (Page 101). © The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see Page 31 for more details. © Without lubrication, using plastic gears in pairs may generate heat and dilation. It is recommended to mate them with steel gears. @ The backlash values shown in the table are the theoretical values for the backlash in the normal direction of a pair of identical gears in mesh. [Caution on Secondary Operations] ©Please read "Caution on Performing Secondary Operations" (Page 32) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available. ©Plastic gears are susceptible to the effects of temperature and moisture. Dimensional changes may occur while performing secondary operations and during post-machining operations. \ * In regards to MC Nylon gears, other materials are available for plastic gears, including Ultra High Molecular Weight Polyethylene (UHMW-PE), which has excellent abrasion resistance. Poly Ether Ether Ketone (PEEK) also has quality properties. A single piece order is acceptable and will be produced as a custom-made gear. For details on quotations and orders please see page 8. t The product shapes of J Series items are identified by background color. [Caution on J series] © As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor. © Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time. © Keyways are made according to JIS B1301 standards, Js9 tolerance. @ Certain products which would otherwise have a very long tapped hole are conterbored to reduce the length of the tap. © For products having a tapped hole, a set screw is included. © Since tapped holes of plastic products are easily broken, avoid too much tightening when fastening screws. For products which have a short tapped hole (Products marked with " ** " are the tap size), fasten with torques less than 0.12N* m for M4, and 0.38N* m for M5. GCU-S Spur Gear Kit Installment : Parallel axes gears (Two-stage) Gear Type : Spur Gears Gears : 2 units of SS1.5-16 2 units of PS1.5-22 Gear Ratio : 1.89 Weight : Approx. 1kg The Gear Kit contains two-stage spur gears and allows speed increases / reductions, and includes the most commonly used combinations of gears. Other Bevel Worm Screw Bevel Miter CP Racks Racks Internal Helical Spur Products Gearboxes Gear Pair Gears Gears Gears & Pinions Gears Gears Gears Technical information on gears is available on KHK Web Site. 141

 Open the catalog to page 1
PS / PSA-2

Module 1.5 PS Other Bevel Worm Screw Bevel Miter CP Racks R . Internal Helical Spur Products Gearboxes Gear Pair Gears Gears Gears & Pinions ac s Gears Gears Gears * The precision grade of J Series products is equivalent to the value shown in the table. [Caution on Product Characteristics] © Significant variations in temperature or humidity can cause dimensional changes in plastic gears (MC Nylon gears), including bore size (H8 when produced), tooth diameter, and backlash. Please see the section "Design of Plastic Gears" in separate technical reference book. (Page 101). © The allowable torques...

 Open the catalog to page 2
PS / PSA-3

Plastic Spur Gears Other Bevel Worm Screw Bevel Miter CP Racks R . Internal Helical Spur Products Gearboxes Gear Pair Gears Gears Gears & Pinions ac s Gears Gears Gears * The precision grade of J Series products is equivalent to the value shown in the table. To order J Series products, please specify; Catalog No. + J + BORE [Caution on Product Characteristics] © Significant variations in temperature or humidity can cause dimensional changes in plastic gears (MC Nylon gears), including bore size (H8 when produced), tooth diameter, and backlash. Please see the section "Design of Plastic Gears"...

 Open the catalog to page 3
PS / PSA-4

Module 2.5 PS • PSA Plastic Spur Gears Other Bevel Worm Screw Bevel Miter CP Racks R . Internal Helical Spur Products Gearboxes Gear Pair Gears Gears Gears & Pinions ac s Gears Gears Gears * The precision grade of J Series products is equivalent to the value shown in the table. To order J Series products, please specify; Catalog No. + J + BORE S5K [Caution on Secondary Operations] ©Please read "Caution on Performing Secondary Operations" (Page 32) when performing modifications and/or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK...

 Open the catalog to page 4
PS / PSA-5

Plastic Spur Gears Other Bevel Worm Screw Bevel Miter CP Racks R . Internal Helical Spur Products Gearboxes Gear Pair Gears Gears Gears & Pinions ac s Gears Gears Gears * The precision grade of J Series products is equivalent to the value shown in the table. [Caution on J series] © As available-on-request products, requires a lead-time for shipping within 2 working-days (excludes the day ordered), after placing an order. Installment : Parallel axes gears (Two-stage) Gear Type : Spur Gears Gears : 2 units of SS1.5-16 2 units of PS1.5-22 Gear Ratio : 1.89 Weight : Approx. 1kg The Gear Kit contains...

 Open the catalog to page 5

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.