THKLWHDG55C1S2E035Linear Way H Size 55 Long Ball Slide Unit — Block Only, S2 Interchangeable, 142 kN Dynamic

Product Description

What this part is

A single IKO Linear Way H slide unit (runner block) in size 55, long-length body, block-mount configuration. Linear Way H is IKO’s highest-capacity ball-type linear guide: two rows of balls arranged for four-point contact per row, which is what lets a ball guide of this envelope carry 142 kN dynamic. This is the slide unit on its own — there is no track rail supplied with it.

Decoding the order code

LWH — Linear Way H series, ball type, two ball rows in four-point contactD — block-type body, mounted from above through the slide unitG — long slide unit (IKO lengths run C short, no symbol standard, G long, L extra long)55 — size 55C1 — one slide unitS2 — S2 interchangeable specification: the slide unit and rail are made to interchange freely. Accuracy and performance of S1 and S2 specifications are identical; the distinction is the interchange scheme, not the gradeE035 — a supplemental code. IKO uses /E for specified rail mounting-hole end positions, so this most plausibly records a 35 mm E dimension on the mating rail. It is not a published catalogue code position and we have not confirmed it, so treat it as a factory build note rather than a spec

Correcting the source data

This record previously carried the brand THK. LWHDG55C1S2 is an IKO Nippon Thompson designation; THK’s equivalents are the HSR and SHS families and use entirely different coding. The brand has been corrected to IKO.

Published ratings and mounting data

Basic dynamic load rating C: 142,000 N (142 kN)Basic static load rating C₀: 168,000 N (168 kN)Static moment T₀: 3,970 N·m; Tₓ 4,120 N·m single / 20,200 N·m double; Tₖ 3,780 N·m single / 18,500 N·m doubleSlide unit length with end seals: 248 mm (the standard-length LWHD55 body is 196 mm)Assembly height: 70 mmSlide unit mass: 7.40 kgMating track rail: 53 mm wide, 43.5 mm tall, mounting holes 16 × 23 × 20 mm at 120 mm pitch, M14 × 45 boltsStandard-block LWHD55 for comparison: C 113,000 N, C₀ 121,000 N, mass 5.30 kg — the long block buys roughly 26% more dynamic capacity for the extra body length

What these specs mean in practice

Choosing the long block over the standard block is a rigidity and moment-capacity decision more than a load-rating one. The extra ball complement raises the double-block moment figures sharply, which matters on cantilevered gantry saddles and single-rail axes where the load is offset from the rail centreline. No preload symbol is present in the order code, so this unit is standard preload — approximately zero clearance, not a T1/T2/T3 preloaded unit. If your machine was built around a lightly or heavily preloaded block, this one will not reproduce its stiffness.

Quantity and configuration

One slide unit. No track rail, no rail cap screws, no end-plate accessories beyond the seals fitted to the block. C1 in the order code confirms a single-unit build.

Fitting notes

The S2 interchangeable specification is the reason this block is worth buying as a loose spare: it will mate to any S1 or S2 LWH55 rail without factory matching. A non-interchangeable (no-symbol) LWH55 block is matched to its original rail and should not be swapped. Check the rail already in your machine before ordering.

Interchange guidance

Also written LWHDG55C1S2E035, LWHDG-55-C1-S2, LWHDG55, LWHD55G, LWH55. Same-envelope competitor guides are dimensionally close but not drop-in: rail width, hole pitch and block height differ enough that mixing brands on one rail is not viable. Verify against the rail in the machine, not against a catalogue table.