Caged Ball Cross LM Guide Model SCR - Structure and Features

Nov 2, 2026

Caged Ball Cross LM Guide Model SCR provides a right-angle, orthogonal LM system by integrating two intersecting rails back-to-back into a single LM block. Precision-ground raceways and ball cages circulating inside the block enable smooth motion. The 4-way equal load design uses a 45° contact angle for uniform load ratings in radial, reverse-radial, and lateral directions. The single-block structure delivers higher rigidity for X-Y tables, including assemblies using an inner saddle.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages8

Reading Time20 min

AccessFree to download

Structure and Features

4-Way Equal Load

High Rigidity

Example of Using an Inner Saddle

Dimensional Table (Unit: mm)

515-1E SCR Caged Ball Cross LM Guide Model SCR Note: For the ball cage, see A1-90 . | Design Highlights | A1-482 | | --- | --- | | Options | A1-507 | | Model No. | A1-577 | | Handling Precautions | A1-583 | | Accessories for Lubrication | A24-1 | | Mounting Procedure | B1-89 | | Equivalent Moment Factor | A1-43 | | Rated Loads in All Directions | A1-61 | | Equivalent Factor in Each Direction | A1-63 | | Radial Clearance | A1-73 | | Accuracy Standards | A1-82 | | Shoulder Height of the Mounting Base and the Corner Radius | A1-492 | | Reference Error Tolerance for the Mounting Surface | A1-498 | | Dimensions of Each Model with Options Attached | A1-521 | Selection Criteria A1-10 A1-166 515-1E SCR Structure and Features Balls roll in four rows of raceways precision-ground on an LM rail and an LM block, and ball cagesand end plates incorporated in the LM block allow the balls to circulate. This LM Guide has two rails intersecting at right angles integrated back-to-back into a single block with the same internal structure as the proven Caged Ball LM Guide Model SHS. Because an orthogonal LM System can be achieved with the Model SCR alone, conventional saddles are no longer necessary, enabling simpliﬁed X-Y motion and compact structure. 4-Way Equal Load Each row of balls is placed at a contact angle of 45° so that the load ratings applied to the LM block are uniform in the four directions (radial, reverse-radial, and lateral directions), enabling the LM Guide to be used in all orientations and in extensive applications. High Rigidity Since the balls are well balanced in four rows, this model is able to withstand moments, and it achieves smooth straight motion even when a preload is applied to increase the rigidity. The rigidity of the single LM block is higher than that of a combination of two conventional LM blocks secured back-to-back with bolts, making this model optimal for building an X-Y table that requires high rigidity. A1-167 LM Guide 515-1E Model SCR Dimensional Table⇒A1-170 This model is the standard type. Example of Using an Inner Saddle Model SCR can easily be assembled and adjusted by using an inner saddle to link four LM blocks together. When installed on an inner saddle, model SCR achieves a highly accurate X-Y guide and high rigidity moment in the yawing direction (as indicated by the arrow in the figure) . Inner saddle A1-168 515-1E SCR LM Guide A1-169 515-1E Model SCR FC1 W2 | Model No. | Outer dimensions | | | LM block dimensions | | | | | | | | | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | | Height
M | Width
W | Length1
L | B1 | B3 | B4 | B | C | C1 | S×ℓ | L2 | H3 | N | E | | SCR 15S | 47 | 48 | 64.4 | — | 11.3 | 34.8 | — | 20 | 14 | 2×2-M4×6 | 33.4 | 3 | 18.5 | 5.5 | | SCR 20S | 57 | 59 | 79 | — | 13 | 42.5 | — | 30 | 14.5 | 2×2-M5×8 | 43 | 4.6 | 23.5 | 12 | | SCR 20 | 57 | 78 | 98 | 13 | 7.5 | 37 | 24 | 56 | 11 | 2×5-M5×8 | 43 | 4.6 | 23.5 | 12 | | SCR 25 | 70 | 88 | 109 | 18 | 9 | 44 | 26 | 64 | 12 | 2×5-M6×10 | 47.4 | 5.8 | 28.5 | 12 | | SCR 30 | 82 | 105 | 131 | 21 | 12 | 53 | 32 | 76 | 14.5 | 2×5-M6×10 | 58 | 7 | 34 | 12 | | SCR 35 | 95 | 123 | 152 | 24 | 14 | 61 | 37 | 90 | 16.5 | 2×5-M8×14 | 68 | 7.5 | 40 | 12 | | SCR 45 | 118 | 140 | 174 | 30 | 16.5 | 75 | 45 | 110 | 15 | 2×5-M10×15 | 84.6 | 8.9 | 49.5 | 16 | | SCR 65 | 180 | 226 | 272 | 40 | 27.5 | 116 | 76 | 180 | 23 | 2×5-M14×22 | 123 | 19 | 71 | 16 | Model number coding 4 SCR25 QZ KKHH C0 +1240/1000L P |
Model number |
Contamination protection accessory symbol |
LM rail length
on the X axis (in mm) |
LM rail length
on the Y axis (in mm) | | --- | --- | --- | --- | Total No. of LM blocks With QZ Lubricator Radial clearance symbol Normal (No symbol)/Light preload (C1) Medium preload (C0) Accuracy symbol Precision grade (P) Super precision grade (SP) Ultra precis

FAQs

What design feature enables an orthogonal LM system in Model SCR?

Two rails intersecting at right angles are integrated back-to-back into a single block, allowing an orthogonal LM system to be achieved with the model alone.

How does the 4-way equal load design work?

Balls are placed at a 45° contact angle so the load ratings applied to the LM block are uniform in four directions: radial, reverse-radial, and lateral.

Why is Model SCR suitable for applications requiring high rigidity?

The single integrated LM block has higher rigidity than two conventional back-to-back LM blocks secured with bolts, helping achieve smooth straight motion even with preload and supporting high-rigidity X-Y table building.

Nov 2, 2026

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