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SRS20FN Linear Guide (Low assembly) Dimensions and Load Ratings

SRS20FN linear guide specifications: dynamic load rating C=1,896 kgf, static load rating C0=3,307 kgf, allowable moment Mx=33,404 kg·mm, block weight 0.29 kg, rail weight 2.28 kg/m.

SR series · low assemblyLow assemblyWith flangeStandard blockSize 20

Identification

SeriesSR series · low assembly
Assembly height H28 mm
Flange typeWith flange
Block lengthStandard
Size20
SuffixFN
Catalogue pageA79

Load ratings and allowable moments

ItemValueDescription
C1,896 kgfBasic dynamic load rating
C03,307 kgfBasic static load rating
Mx33,404 kg·mmAllowable moment, rolling
My26,459 kg·mmAllowable moment, pitching — single block
My126,998 kg·mmAllowable moment, pitching — two blocks
Mz26,459 kg·mmAllowable moment, yawing — single block
Mz126,998 kg·mmAllowable moment, yawing — two blocks

Weights

ItemValue
Block weight0.29 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

SRS15FNSRS15FSSRS15VNSRS15VSSRS20FSSRS20VNSRS20VSSRS25FNSRS25VNSRS25VSSRS30VNSRS30VSSRS35VESRS35VNSRS45VN

FAQ

How do C and C0 differ for SRS20FN?
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 26,459 to 126,998 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 A79; dimension tables on the adjacent pages.

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