Introduction to UKAI Casters

2025/11/9 Introduction to UKAI Casters 1 1 Introduction to UKAI Casters Introduction to UKAI Casters Vol.E2025-1 2 2 1

2025/11/9 Introduction to UKAI Casters Introduction to UKAI Casters – Table of Contents • Introduction to UKAI Casters • Origin of the UKAI Mark [P.4] / Features of UKAI Casters [P.5] • What is a Caster? • How to Use Casters[P.6] / Names of Each Parts and Dimensions[P.8] • Types of Casters[P.10] / Types of Casters with Stoppers[P.11] • Load Capacity and Adequate Load of Casters[P.12] / How to Attach Casters [P.14] • Product Introduction of UKAI Casters • The Model Number of UKAI Casters [P.15] / How to Read UKAI Caster Engraving [P.16] • Introduction of Main Casters[P.17] • Tire Materials and Features[P.20] • Introduction of Main Wheels[P.21] • Introduction of Pneumatic Rubber / Airless Wheel Casters • Names of Each Part and Dimensions[P.27] / The Model Number of UKAI Pneumatic Wheel Casters [P.29] • Introduction of UKAI Pneumatic Rubber / Airless Wheel Casters [P.30] • Introduction of UKAI Pneumatic Rubber / Airless Wheel [P.31] • Checklist for Usage Conditions[P.32] • FAQ (Frequently Asked Questions)[P.33] *Note: Page numbers refer to slide numbers. 3 3 Introduction to UKAI Casters Origin of the UKAI Mark Named after “UKAI” (cormorant fishing) on the Nagara River in Gifu Prefecture 1. UKAI Casters were established in 1970 2. Pioneered the production of steel plate casters manufactured by pressing, as opposed to cast or welded casters 4 4 2

2025/11/9 Introduction to UKAI Casters Features of UKAI Casters The patented structure of the ball retainer in the swivel General casters support part provides smooth and stable swiveling over a long period, even under strong impacts Center pin Uses a tubular ball retainer instead of a center pin The swivel support area is large and can withstand strong impacts Ball Retainer Although the patent has expired and similar structures are now Patented (Utility Model) used by other companies, this PAT.1242732 proves the excellence of the technology UKAI Casters 5 5 Introduction to UKAI Casters What is a Caster? According to the UKAI Caster catalog: JPN Catalog P.5 Casters are attached to transportation equipment and other devices inside rooms and facilities, with the purpose of facilitating the relocation or transfer of cargoes, excluding people and animals, and moved by human power intermittently. Purpose Where How Makes moving Attached to transport Used intermittently and transporting equipment and various by human power loads easier machines Speed Limnits Below 4km/h 6 6 3

2025/11/9 Introduction to UKAI Casters How to Use Casters Examples: Various Handcarts Shopping carts Roll boxes equipment And so on 7 7 Introduction to UKAI Casters Names of Each Parts and Dimensions JPN Catalog P.7 Names of Each Part and Dimensions Caster SJ-150 Casters consist of bracket and wheel Bracket The mounting plate has four holes for bolts to attach to the object、 J-150 Mounting This part rotates, and the caster faces in the plate direction of travel. It contains steel balls, Swivel bearings, etc. Part Bracket This is where the wheels are attached. Body Shaft The bracket and wheel are connected by a shaft. Wheel The wheel center contains bearings or bushings S-150 for rotation. Bearings It is located inside the wheel and is made of Wheel Rim steel plate, aluminum die-cast, resin, etc. Tire Tire materials include rubber, urethane, nylon, etc. 8 8 4

2025/11/9 Introduction to UKAI Casters Caster Dimensions Casters consist of bracket and wheel The top plate has mounting holes. The hole JPN Ctalog P.7 diameter and pitch must match those of the mounting surface. The height from the top plate to the center of Mounting Hole the shaft hole. The width of the The total height from the top plate seat surface wheel to the wheel contact surface. The outer diameter of the wheel The width of the The shaft diameter wheel's rotation center Tire Width Offset Boss Width 9 9 Introduction to UKAI Casters Types of Casters Swivel Caster Rigid Caster Swivel Caster with Stopper Rigid Caster with Stopper The caster can freely turn The caster only moves When you press the pedal, Left-side Stopper: The When you press the Left-side Stopper: The in the direction of travel in one direction both the wheel rotation pedal is on the left side in pedal, only the wheel pedal is on the left side in and the bracket swivel are the direction of travel rotation is locked the direction of travel JPN Catalog P.9 locked 1. There are swivel casters that can freely turn in the direction of travel, and fixed casters that only move in one direction. 2. There are also types with stoppers that lock the wheel or bracket when the pedal is pressed. When you press the pedal, only the wheel rotation is locked 10 10 5 Shaft Diameter Bracket Height Overall Height

2025/11/9 Introduction to UKAI Casters Types of Casters with Stoppers Double Stopper Single Stopper × × 〇 〇 When the × × When the When the × stopper is ON × stopper is ON stopper is ON Both wheel rotation and bracket swivel Only wheel rotation are locked. are locked. There are two types of casters with stoppers: 1. Double stopper: Stops both the wheel rotation and the bracket swivel at the same time. 2. Single stopper: Stops only the wheel rotation. 11 11 Introduction to UKAI Casters Load Capacity and Adequate Load of Casters Load Capacity and Adequate Load JPN Catalog P.5 Load Upper limit for safe, smooth use for a long period of time. Capacity This value is listed in the catalog. When casters are attached to a cart （use of 4 casters）, the load needs to be Adequate supported at 3points. Accordingly, please calculate the load, assuming 80% of the maximum load, as shown in the following. Load Adequate Load = Load Capacity per 1 pcs (daN) x 4 pcs x 0.8 About the unit daN (decaNewton) The unit of force used is daN (decanewton). Mass 1daN=10N≒1.02kgf (1kgf ≒9.8N=0.98daN) 500kg the load on the casters is 500 kgf or 490 daN. 12 12 6

2025/11/9 Introduction to UKAI Casters Load Capacity and Adequate Load of Casters Examples: The load to be carried should be 640 daN (652.8 kgf) or less JPN Catalog P.5 When using four casters on a cart: 200 daN (max load) × 4 (pcs) × 0.8 = 640 daN (652.8 kgf) For caster SJ-150, the maximum load per caster is 200 daN (204.0 kgf). 1. The catalog lists the maximum load per caster in daN (1 daN = 1.02 kgf). 13 2. When using on a cart, use within the adequate load. 13 Introduction to UKAI Casters How to Attach Casters Plate-type caster Mounting Hole Pitch Plate Hole 1. Pass bolts through the four holes in the top plate and Mounting attach to the object (cart, Hole Pitch equipment, etc.). 2. If the pitch or diameter of the Screw-in type caster mounting holes does not match, attachment is not possible. 3. The length of the bolts depends on the situation of the object. 4. There are also screw-in type casters (mainly for lighter loads). 14 14 7

2025/11/9 Introduction to UKAI Casters The Model Number of UKAI Casters ●The Model Number of UKAI Casters Wheel Type Bracket Type Wheel Size (mm) JPN Catalog P.7 S J - 150 150mm Medium Weight Rubb＋er Wheel with Swivel Bracket SJ-150 RR JM - 150 150mm Heavy Duty MC Nylon Wheel with Swivel Bracket RRJM-150 ●The Model Number of UKAI Wheels Wheel Type Wheel Size (mm) S - 150 150mm Rubber Wheel S-150 RR - 150 15 150mm MC Nylon Wheel RR-150 15 Introduction to UKAI Casters How to Read UKAI Caster Engraving Brakcet Type UKAI Mark “J-150” J-150 UKAI Mark Wheel Bracket Wheel Size Type Type (mm) S J - 150 Wheel Type “S 150X45”⇒ S Type: Size 150mm / wheel width45mm S-150 16 16 8

2025/11/9 Introduction to UKAI Casters Introduction of Main Casters (Part 1) Medium Weight Caster Series J, K, JB, KBZ Heavy Duty Caster Series JM, KH, JMB Size: 75mm～300mm Size: 50mm～200mm 1． Can carry heavy loads (max 1． Standard casters focused on load 660 daN [673.2 kgf] for cost performance 200 mm size) 2． Available with stoppers to lock wheel rotation and bracket swivel 2． Available with stoppers to lock wheel rotation JPN Catalog P.19 JPN Catalog P.67 Stainless Steel Caster Series JA, KA, JAB, KABZ Super Heavy Duty Caster Series JH, JHB Size: 75mm～200mm Size: 130mm～200mm 1． Ideal for places exposed to 1． Can carry heavier loads water (uses JIS SUS304 stainless (max load 800 daN [816.0 kgf] steel) for 200 mm size) 2．Available with stoppers to lock 2．Easy to move even with wheel rotation and bracket swivel heavy loads (uses bearings in swivel part) JPN Catalog P.43 JPN Catalog P.77 17 17 Introduction to UKAI Casters Introduction of Main Casters (Part 2) Rich Urethane Caster Series RUJH, RUJHB, RUKH Low Height Caster Series T, TN Size: 150mm Size: 50mm 1．Easy movement of heavy loads 1． Low mounting (over 60% reduction in starting height (57 mm for resistance) 50 mm size) 2．Less wheel wear (about 47% 2． Dustproof type reduction in friction volume) also available JPN Catalog P.87 JPN Catalog P.83 Towing Caster Series JHW, KHW, KW Heavy Duty Low Height Caster Series TH Size: 150mm～200mm Size: 50mm/65mm 1. Low mounting 1． Nuts do not loosen even when height (87 mm for towed (secured with split pins) 65 mm size) 2． Easy to move even with heavy 2. Max load for 65 mm loads (uses bearings in swivel part) size: 450 daN [459.0 kgf] JPN Catalog P.81 JPN Catalog P.85 18 18 9

2025/11/9 Introduction to UKAI Casters Caster Selection (Flowchart) The selection process for each caster is as follows: If you want to If you want Start carry heavier loads If you want lower overall height without changing size even lighter movement Low Height Caster Medium Weight Caster Heavy Duty Caster Series Super Heavy-Duty Caster Series T, TN Series J, K, JB, KBZ JM, KH, JMB Series JH, JHB Standard If you want If you want to corrosion resistance move heavy loads If you want to (for wet environments) even more easily use it If you want to for towing carry heavier loads Heavy Duty Low Height Stainless Steel Caster Series Rich Urethane Caster Series Towing Caster Series Caster Series TH JA, KA, JAB, KABZ RUJH, RUJHB, RUKH JHW, KHW, KW 19 19 Introduction to UKAI Casters HS: Shore hardness HR: Rockwell hardness Tire Materials and Features JPN Catalog P.8 (higher number = harder) Tire Material Rubber Urethane Nylon MC Nylon Monomer cast nylon, Better properties Excellent oil/weather In short Most common wheel a reinforced version of than rubber resistance, no elasticity regular nylon Hardness HS65 HS95(antistatic HS90) HR120 HR120 Elasticity ☆ ◎ × × Compression Set ○ ◎ ☆ ☆ ☆ Excellent Wear Resistance ◎ ☆ ☆ ☆ ◎ Very Good Weather Resistance ○ ☆ ☆ ☆ ○ Good Oil Resistance △ ☆ ☆ ☆ △ Fair (machine oil) × Poor Gasoline Resistance × ◎ ◎ ◎ 80(heat-resistant rubber Heat Resistance (℃) 70 70 130 100) Cold Resistance (℃) -40 -30 -40 -40 Water Resistance △ △ ○ ○ Chemical Resistance △ × ◎ ◎ (acid / alkali) Starting Performance ◎ ◎(Rich Urethane☆) ☆ ☆ 20 20 10

2025/11/9 Introduction to UKAI Casters Introduction of Main Rubber Wheels Polybutadiene Polybutadiene Heavy Duty Steel Rim / Rubber Wheel Red Rubber Size: 75mm～300mm Polybutadiene Rubber Wheel Size: 100mm～200mm S Type Wheel SR Type RG Type 1. Standard rubber wheels for 1. Rubber wheels for heavy-duty medium-duty caster casters 2. Wheel Rim: Steel 2. Wheel Rim: Made of Aluminum 3. Red rubber wheels (SR) that do alloy for die casting (ADC-12) not easily stain the floor, and (200mm size is steel rim) heat-resistant rubber wheel (CR) 3. Maximum load for 200mm size: with a heat resistance of 100 ℃ 410 daN [418.2 kgf] are also available 200mm JPN Catalog P.89 JPN Catalog P.97 Nylon Rim / Nylon Rim / Rubber Rubber Wheel Wheel (Spindle Size: 75mm～200mm PN Type Sleeve) PNA Type 1. Rubber wheels with nylon rim 2. Ideal for locations exposed to water 3. Stainless steel bearing wheel (PND) and spindle sleeve wheel (PNA) are also available JPN Catalog P.92 / P.94 21 21 Introduction to UKAI Casters Introduction of Main Urethane Wheels Urethane Antistatic Heavy Duty Aluminum Rim / Size: Rubber Wheel urethane wheel Size: 50mm～300mm SUI Type SUIE Type Urethane Rubber Wheel R Type 100mm/130mm/150mm 1. Standard urethane rubber wheels for medium-duty 1. Urethane rubber wheel For casters heavy-duty casters 2. Wheel Rim: Steel 2. Wheel Rim: Aluminum alloy 3. Antistatic urethane wheel for die casting (ADC-12) (SUIE) available for 3. Maximum load for 150mm cleanroom use size: 500 daN [510.0 kgf] JPN Catalog P.91 / P.96 JPN Catalog P.98 Nylon Rim / Nylon Rim / Urethane Heavy Duty Steel Rim / Urethane Rubber Rubber Wheel (Spindle Size: 75mm～200mm Size: 65mm～200mm Wheel PNU Type Sleeve)PNUA Type Urethane Rubber Wheel RF Type 1. Urethane rubber wheels with nylon rim 1. Urethane rubber wheel For 2. Ideal for locations exposed heavy-duty casters to water 2. Wheel Rim: Steel 3. Stainless steel bearing wheel 3. Maximum load for 200mm (PNUD) and spindle sleeve size: 600 daN [612.0 kgf] wheel (PNUA) are also available 22 JPN Catalog P.93 / P.94 JPN Catalog P.98 22 11

2025/11/9 Introduction to UKAI Casters Introduction of Main Nylon Wheels Nylon Wheel Nylon Wheel Reinforced Nylon Wheel Size: (Spindle Sleeve) PB Type Size: 75mm～200mm RGN Type 50mm～100mm P Type 1. Lightweight, integrated resin 1. Reinforced nylon wheel For wheels heavy-duty casters 2. Ideal for locations exposed 2. Made of nylon 6 mixed with to water glass fiber for reinforcement 3. Stainless steel bearing wheel 3. Maximum load for 100mm (PBD) and spindle sleeve size: 500 daN [510.0 kgf] wheel (P) are also available JPN Catalog P.95 / P.96 JPN Catalog P.97 23 23 Introduction to UKAI Casters Introduction of Main MC Nylon Wheels (Part 1) MC Nylon Wheel RR Type Size: 50mm～200mm 1. Made of MC nylon, excellent in wear resistance and load capacity 2. Maximum load for 200mm size: 660 daN [673.2 kgf] 50mm～100mm 130mm～200mm JPN Catalog P.100 24 24 12

2025/11/9 Introduction to UKAI Casters Introduction of Main MC Nylon Wheels (Part 2) MC Nylon Wheel MC Nylon Wheel Size: MC Nylon Wheel Size: UWB Type (Spindle Sleeve) UWA 75mm～200mm UWBS Type 75mm～250mm 1. Made of MC nylon, excellent 1. Narrower wheel width in wear resistance and load compared to UWB type, capacity advantageous in cost and 2. Ideal for locations exposed to starting performance water 2. Stainless steel bearing 3. Stainless steel bearing wheels wheel (UWBSD) also (UWBD) and spindle sleeve available wheels (UWA) are also available 3. Maximum load for 250mm 4. Maximum load for 200mm size: 1,000 daN [1,020 kgf] size: 1,400 daN [1,428 kgf] (When using only the (When using only the wheels) wheels) JPN Catalog P.101 / P.102 JPN Catalog P.103 25 25 Introduction to UKAI Casters Introduction of Pneumatic Rubber / Airless Wheel Casters Casters with wheels like those used in wheelbarrows, equipped with pneumatic tires 1. Pneumatic tires provide superior elasticity (cushioning) compared to regular rubber wheels 2. Tires have grooves, making them ideal for use on uneven surfaces, asphalt, soil, etc. 3. There are also puncture-proof tires available 26 26 13

2025/11/9 Introduction to UKAI Casters Names of Each Part of Pneumatic Wheels JPN Catalog P.121 Wheel The tire and tube are sandwiched between two rims on the left and right Rim Bearings Built into the center of the rim, allowing rotation Attached to the tube, used for air filling (American valve type) Valve Donut-shaped, located inside the tire, filled with Tube air The part that contacts the ground, with tread Tire patterns 27 27 Introduction to UKAI Casters Dimension of Pneumatic Wheels JPN Catalog P.121 Diameter of the shaft Diameter of the wheel Dimensions of each rim part Width of the tire Rim Inside Width Rim Outside Width Tire Width Boss Width Width of the wheel's rotation center 28 28 14 Shaft Diameter Rim Bead Diameter Rim Diameter

2025/11/9 Introduction to UKAI Casters JPN Catalog P.121 The Model Number of Pneumatic Wheels Casters ● The Model Number of UKAI Pneumatic Rubber / Airless Wheel Casters HLJ 6 1 2 ×2 - 3 BLACK Bracket Type Tire Dia. Tire Width Ri HLJ6 1 m Inside Wheel 2 ×2-3 BLACK 1 Swivel Caster 6 inch 2inch Width 3inch Tire Color: Black 2 HLK 2.50 - 4 PU GRAY Bracket Type Tire Dia. Rim Inside Wheel Rigid Caster 2.5inch Width 4inch Foaming Urethane / Gray HLK2.50-4 PU GRAY ● The Model Number of UKAI Pneumatic Wheels 6 1 2 ×2 - 3 HL BLACK 4PR 1 Tire Dia. Tire Width Rim Inside HubLess Wheel Ply Rating 6 2 ×2-3HL BLACK 1 6 inch 2inch Width 3inch Tire Color: Black (Tire strength) 2 2.50 - 4 HL PU GRAY 4PR Tire Dia. Rim Inside HubLess Wheel Ply Rating 29 2.50-4HL PU GRAY 2.5inch Width 4inch Foaming Urethane / Gray (Tire strength) 29 Introduction to UKAI Casters Introduction of Pneumatic Rubber / Airless Wheel Casters Swivel Caster Rigid Caster Swivel Caster with Stopper HLJ/HLJY/HFJF HLK/HFKF HLJB/HLJBF HLJS/HLJYS JPN Catalog P.123 JPN Catalog P.125 JPN Catalog P.128 JPN Catalog P.127 Both the wheel rotation and the bracket swivel are locked Only the wheel HLJ6 12 ×2-3 BLACK HLK6 12 ×2-3 BLACK HLETJB2.50-4 PU GRAY HLJS6 12 ×2-3 GRAY rotation is locked 30 HLJ2.50-4 BLACK HLK2.50-4 BLACK HLJB3.00-4 BLACK HLJYS6 12 ×2-3 PU 30 15

2025/11/9 Introduction to UKAI Casters JPN Catalog P.130 Introduction of UKAI Pneumatic Rubber Wheels Pneumatic Tires FO: Tire made by overseas 1. Pneumatic Tires manufacturers 2. Tire color : Black and Gray 3. Made by overseas manufacturers and BS: Tire made Bridgestone by Bridgestone 4. Risk of puncture 1 6 2×2-3HL BLACK 6 12×2-3HL GRAY 3.00-4HL BS 3.00-4HL FO 3.50-5HL BS Puncture-Proof Tires (PU): Tire color: 1. Foam urethane filled BLACK 61/2×2-3PU : urethane foam integrated 2. Tire color : Black and Gray 61/2×2-3PU: Only Gray 3. Almost the same cushioning as pneumatic Tire color: tires GRAY 6 12 ×2-3HL PU 4. No risk of puncture 2.50-4HL PU BLACK 2.50-4HL PU GRAY Airless Tires (AL) 1. Solid rubber wheel 2. Tire color: Only Black 3. Hard and heavy but excellent load capacity 4. No risk of puncture 2.50-4HL AL 3.00-4HL AL 3.50-5HL AL 31 31 Introduction to UKAI Casters Checklist for Usage Conditions Please check the following usage conditions: 1. Loading method (e.g., cart, installed under equipment) 2. Mounting method (e.g., mounting hole pitch, diameter) 3. Load (e.g., 300kg including cart weight) 4. Usage Environment 1. Floor material (e.g., concrete, asphalt, grating, steel plate) 2. Floor condition (e.g., unevenness) 3. Usage temperature (e.g., below -20°C) 4. Environment (e.g., exposed to oil, water, steam, cleanroom) 5. Location (e.g., indoor, outdoor) 5. Restrictions (height, noise, vibration, others) 6. Other 7. Other concerns beyond the above terms of use 32 32 16

2025/11/9 Introduction to UKAI Casters FAQ (Frequently Asked Questions) Q1 I want to make it as A1 Taking the following measures will improve starting performance. easy to move as ① Use rich urethane casters possible. ② Change wheel material to a harder one (rubber → urethane → nylon) Note: Depending on the floor condition, harder wheels may not be suitable ③ Increase wheel diameter (e.g., change from 100mm to 200mm) ④ Narrow the tire width (e.g., change from UWB type to UWBS type) ⑤ Make the wheel contact surface rounded to reduce friction ※ In both ④ and ⑤, the contact area becomes smaller, reducing friction. Q2 I want to use it in A2 ① Use stainless steel casters to prevent rust environments ② For chemical resistance, nylon and MC nylon are better than rubber or exposed to water or urethane chemicals. Q3 I want to use it in A3 ① Use heat-resistant rubber wheels (CR type) or MC nylon wheels high or low ② Change the grease in the wheel bearings and brackets to heat-resistant temperature or cold-resistant types (please inform the actual usage temperature) environments. Last Update: 2025/11/10 33 33 Introduction to UKAI Casters 34 34 17