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SRH20FN Linear Guide (High assembly) Dimensions and Load Ratings

SRH20FN linear guide specifications: dynamic load rating C=2,050 kgf, static load rating C0=3,696 kgf, allowable moment Mx=37,334 kg·mm, block weight 0.39 kg, rail weight 2.28 kg/m.

SR series · high assemblyHigh assemblyWith flangeStandard blockSize 20

Identification

SeriesSR series · high assembly
Assembly height H30 mm
Flange typeWith flange
Block lengthStandard
Size20
SuffixFN
Catalogue pageA75

Load ratings and allowable moments

ItemValueDescription
C2,050 kgfBasic dynamic load rating
C03,696 kgfBasic static load rating
Mx37,334 kg·mmAllowable moment, rolling
My33,268 kg·mmAllowable moment, pitching — single block
My157,298 kg·mmAllowable moment, pitching — two blocks
Mz33,268 kg·mmAllowable moment, yawing — single block
Mz157,298 kg·mmAllowable moment, yawing — two blocks

Weights

ItemValue
Block weight0.39 kg
Rail weight (per metre)2.28 kg/m

Rail weight is a per-size figure and does not depend on block count.

Other sizes in this series

SRH15FNSRH15VNSRH20FESRH20VESRH20VNSRH25FESRH25FNSRH25VESRH25VNSRH30FESRH30FNSRH30VESRH30VNSRH35FESRH35FNSRH35VESRH35VNSRH45FESRH45FLSRH45VESRH45VL

FAQ

How do C and C0 differ for SRH20FN?
C0 is the static rating used for the static safety factor check at rest or low speed; C is the dynamic rating used in the life formula. They describe different conditions and are not interchangeable.
How much stronger are two blocks than one?
For this model the two-block allowable pitching moment rises from 33,268 to 157,298 kg·mm. Select per catalogue table 2.x and remember to apply the contact-factor fc derating.
How many blocks and rails fit this model?
Size 20 is available both as separate blocks and rails, and as factory-matched sets with higher combination accuracy. Rail length is cut to your stroke; accuracy N/H/P/SP and clearance ZF/Z0/Z1/Z2 are all orderable.

Related Technical Guides

Linear Guide SelectionMounting TorqueScrew SizingSupport Unit CardsSelection Tree

Load and moment data from the MOSIONX 2026 general catalogue, chapter A page A75; dimension tables on the adjacent pages.

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