TOPBALL
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TOPBALL TOPBALL R TYPES Table D-1 Types The NB TOPBALL is a linear motion mechanism utilizing the rotational motion of ball elements. NB's self-aligning TOPBALL can be designed into many different applications such as factory automated equipment, machine tools, industrial machines, electrical equipment, optical and measuring instruments. Floating Seal closed type NB's unique floating seal design allows for selfalignment while maintaining equal and constant contact to the shaft. Seals do not add to the overall length of the bushing allowing for more compact designs. NB's uniquely designed...

LIFE CALCULATION Since ball elements are used as the rolling element in the NB TOPBALL, the following equation is used to calculate the rated life. L: rated life (km) fH: hardness coefficient fT: temperature coefficient fc: contact coefficient fw: applied load coefficient (Table D-2) C: basic dynamic load rating (N) P: applied load (N) 'Refer to page Eng-5 for the coefficients. Applied Load Coefficient (fw) When calculating the applied load, the weight of the mass, inertial force, moment resulting from the motion, and the variation with time should be accurately estimated. However, it is...

- TOPBALL Inch Type - part number structure TW-OP type blank: standard blank: closed blank: without seal UU: seals on both sides '<• For anti-corrosion the load plates are electroless nickel plated with stainless steel balls. " Based on nominal housing bore "** One-sided seal is also available. Please contact NB for details.

- Block Type - part number structure inner contact diameter blank: standard self aligning blank: self-aligning blank: without seal UU: seals on both sides ^ For anti-corrosion the load plates are electroless nickel plated with stainless steel balls. * ST option is available for size 12 to 40 (self-aligning type) An oil hole is not provided on size 8,10,12, and 16. TKA-W TYPE(Euro Standard) - Double-Wide Block Type - part number structure example [J^gfflmj[ITI].ng inner contact diameter double-wide type blank: standard blank: without seal UU: seals on both sides Y>. For anti-corrosion the...

— Open Block Type - part number structure inner contact diameter Wank: standard self aligning blank: self-aligning blank: without seal UU: seals on both sides i>si For anti-corrosion the load plates are electroless nickel plated with stainless steel balls. self-aligning type) TKE-W TYPE(Euro Standard) - Double-Wide Open Block Type - part number structure example ETOglSlPilfflll-Ha inner contact diameter double-wide type blank: standard blank: without seal UU: seals on both sides * For anti-corrosion the load plates are electroless nickel plated with stainless steel balls.

- Clearance Adjustable Open Block Type part number structure example nmpmmil.Hi-Ha blank: standard inner contact diameter self aligning blank: self-aligning blank: without seal UU: seals on both sides it For anti-corrosion the load plates are electroless nickel plated with stainless steel balls. (self-aligning type) TKD-W TYPE(Euro Standard) - Clearance Adjustable Double-Wide Open Block Type part number structure example nBSlPTilPjimil-Ha inner contact diameter double-wide type blank: standard blank: without seal UU: seals on both sides jt For anti-corrosion the load plates are electroless...

- Block Type - part number structure blank: standard blank: without seal UU: seals on both sides H For anti-corrosion the load plates are electroless nickel plated with stainless steel balls. * Provided with push-in oil fitting for tapped hole with a plug for adding 1/4" to 1/2" sizes. Sizes from 5/8" to 2" offer a 1/4-28 TWA-W TYPE(|nch Standard) - Double-Wide Block Type - part number structure example WWJMilim [Til-SB double-wide type blank: standard blank: without seal UU: seals on both sides s«For anti-corrosion the load plates are electroless nickel plated with stainless steel balls. *...

- Clearance Adjustable Block Type - part number structure blank: standard blank: without seal UU: seals on both sides i>si For anti-corrosion the load plates are electroless nickel plated with stainless steel balls. * Provided with push-in oil fitting for 1 tapped hole with a plug for adding /4" to 1/2" size. Sizes from 5/8" to 2" offer a 1/4-28 TWJ-W TYPE(|nch Standard) - Clearance Adjustable Double-Wide Block Type - part number structure example miWBSlPjllllll-Hg double-wide type blank: standard blank: without seal UU: seals on both sides *For anti-corrosion the load plates are...

- Open Block Type - part number structure blank: standard blank: without seal UU: seals on both sides *i For anti-corrosion the load plates are electroless nickel plated with stainless steel balls. * Provided with push-in oil fitting for 11T size only. Sizes from 5/8" to 2" offer a 1 /4-28 tapped hole with a plug for adding a fitting if desired. TWD-W TYPEdnch Standard) - Double-Wide Open Block Type - part number structure example ningHgrajmij-Hg double-wide type blank: standard blank: without seal UU: seals on both sides i^For anti-corrosion the load plates are electroless nickel plated...