Description Roller Overview This 50 mm gravity roller is manufactured in the UK and produced to order. It uses a 50 mm × 1.5 mm steel or stainless-steel tube fitted with KTR-02/03 bearings and is available with 8 mm, 10 mm, 11 mm hex, and 12 mm spring-loaded spindle options in steel or stainless steel. The 50 mm diameter provides low inertia and free-running characteristics suitable for typical gravity conveyor applications, including packing areas, assembly workstations, manual handling sections, feed-on and off-load positions, and light to medium-duty transfer lines. Roller Specification Tube: 50 mm diameter × 1.5 mm wall ERW steel or stainless steel • Bearing Type: KTR-02/03 plastic-housed roller bearing with steel or stainless-steel balls • Spindle Options: 8 mm, 10 mm, 11 mm hex, and 12 mm spring-loaded spindles in steel or stainless steel • Machined Spindle Finishes: Male thread, female thread, drilled and tapped, or other machined ends available on request • Fitment Type: Spring-loaded spindle • Inside Frame Selection: Inside frame width (IFW) = RL 10 mm for spring-loaded rollers • Custom Sizes: Non-standard lengths and custom spindle types can be produced to order • Tolerance: Finished roller dimensions ±1–2 mm Load Rating (Gravity Applications, 0–80 °C) 8 mm and 10 mm spindle versions: up to 30 kg per roller 11 mm hex and 12 mm spindle versions: up to 20 kg per roller These values are based on the dynamic load ratings of the KTR-02/03 bearings (15 kg or 10 kg per bearing, two bearings per roller) with the load applied near the centre of the roller. Suitable for roller lengths 100–1200 mm RL in standard gravity conveyor use without impact loading. Note: Actual allowable load also depends on roller length, tube and spindle stiffness, frame design, loading position and any shock or impact. For higher loads, long roller lengths, accumulation or driven applications, please ask us to confirm suitability. Roller Overbearing (OB) Roller Length (RL) / Face Width (FW) Spindle Length Tube Cut Length 100 94 130 86.8 150 144 180 136.8 200 194 230 186.2 250 244 280 236.8 300 294 330 286.8 350 344 380 336.68 400 394 430 386.68 450 444 480 436.68 500 494 530 486.68 550 544 580 536.68 600 594 630 586.68 650 644 680 636.68 700 694 730 686.68 750 744 780 736.68 800 794 830 786.68 850 844 880 836.68 900 894 930 886.68 950 944 980 936.68 1000 994 1030 986.68 1050 1044 1080 1036.68 1100 1094 1130 1086.68 1150 1144 1180 1136.68 1200 1194 1230 1186.68 Dimension Definitions (UK/EU Standard) Term Meaning Also Known As (UK/EU) RL / FW Tube length only (does not include bearing projection) Tube Length, Face Width OB Bearing projection beyond the tube BEP (Bearing End Projection), PLE (Projection Each End) Spindle Length Overall spindle/axle length including spring tips (where used) OAL (Overall Axle Length), SL (Shaft Length), OA (Over Axle) Tube Cut Length Tube length before bearings are fitted Cut Length IFW Inside frame width the roller fits into Between Frame (BF) / Between Brackets (BB) Rule: For spring-loaded rollers: IFW = RL 10mm — Related
