Miniature Linear Guides - Long Blocks, Light Preload

• *1 For the material of each part, see MISUMI linear guide product information.
• *2 If the required rail length is not available as a standard (fixed) length, select 1 mm increments (configurable length).
• *3 For 3- or 4-block products, select the 1-block part number and specify "B3 (3 blocks)" or "B4 (4 blocks)" as additional machining.
• *5 Low-temperature black chrome plated products are limited to a maximum of 2 blocks.
• *4 MX types (with lubrication unit) are available with standard grease only.
• H6 is not available in normal grade or precision grade.
• Heat resistance temperature is −20 to 80°C.
• Not possible: Blocks and rails cannot be purchased separately. (They are also not available through the non-catalog product service.)
• Part number configuration

• For configurable-L types, the G dimension differs from the table below.
• Not possible: Blocks and rails cannot be purchased separately. (They are also not available through the non-catalog product service.)

H and W2 dimensional accuracy

L dimensional tolerance (unit: mm)

• Pair variation of height is the difference between the minimum and maximum height of multiple blocks assembled on one rail.
• Pair variation of width is the difference between the minimum and maximum width between the rail and the multiple blocks assembled on it.
• The accuracy of low-temperature black chrome plated miniature linear guides is as shown above.
• The sliding resistance is higher than normal: approx. 1.2 N or less.

Dimensional tolerances of other symbols

Per JIS B 0405-1991 class m (medium)

Specifications

• *5 Values in ( ) are the minimum rail lengths for 2-block types.
• *5 For 1 mm increments (configurable length), H20 is limited to a maximum of 939 mm.
• *6 For configurable-L types, both ends of the rail are cut equally. In that case the G dimension differs from the table.
• H dimensions 6 and 8 come with screws or bolts for rail mounting. H6: cross-recessed pan head machine screw No. 0, type 1 (M2×6). H8: hexagon socket head cap screw (M2×6).
• Other sizes do not include them.
• Align and fix the reference surfaces (the side with the straight groove) of both the rail and the block correctly. For details, see "Mounting and handling" below.
• Waterproof specifications are not available.
• Standard rail lengths (fixed length)
• The table below lists the standard rail lengths for each size.

Lengths in ( ) are not available as standard products for 2-block types.

Basic load ratings, static allowable moments, mass, frictional resistance (required thrust) and sliding resistance (seal resistance)

kgf=N×0.101972

• *8 The basic load rating is the same in all 4 directions acting on the block (radial, reverse radial and lateral directions). The guide can be used in any orientation.
• *9 The static allowable moments with 2 blocks in contact are reference values, not guaranteed values.
• As a guide, the allowable load and allowable moment of the linear guide are the values (table above) divided by the static safety factor fs (table below).
• Example: allowable load of H10 under normal operating conditions (kN) ⇒ 3.7/2 = 1.85 (approx. 189 kg)
• The frictional resistance (required thrust) when actually using a linear guide varies with the applied load and other factors.
• * Sliding resistance values are calculated reference values, not guaranteed values.
• Static safety factor (lower limit of fs)

• Allowable load (N) ≤ Co/fs
• Allowable moment (N·m) ≤ (MA, MB, MC)/fs fs: static safety factor, Co: basic static load rating
• MA, MB, MC: static allowable moments (N·m)
• Frictional resistance (required thrust)
• In a linear guide the rolling elements roll, so frictional resistance is lower than in a sliding guide, but it varies with the applied load, speed and lubricant characteristics.
• Frictional resistance increases especially when a moment is applied or when preload is given. Seal resistance varies with the seal lip interference and the lubricant condition, but it is not proportional to the applied load and always shows a constant value. Frictional resistance is obtained from the following formula.
• F = μ·w + f
• F: frictional resistance (N)
• μ: dynamic friction coefficient w: applied load (N)
• f: sliding resistance (seal resistance)
• Dynamic friction coefficient

• Calculation example
• Conditions: miniature linear guide (standard rail), assembled height (H): 10 ... sliding resistance (seal resistance): 0.5 (N)
• Dynamic friction coefficient (μ): 0.005
• Applied load: 150 (N)
• F (frictional resistance) = 0.005×150 + 0.5 = 1.25 (N)
• Mounting and handling

Reference surfaces and mounting orientation

• The reference surface is the side face of the block and rail that carries the reference mark (groove) (Fig. A). Always use the guide with the reference surfaces aligned with each other.
• Mounting orientations such as those in Fig. B are possible. The basic load rating is the same for all of them.

Precautions for use

• The retainer (wire) prevents the balls from falling out, but care is required when removing or fitting the block.
• If blocks and rails are swapped and recombined, radial clearance and accuracy cannot be guaranteed.
• Rails cannot be joined end to end.
• Linear guide accuracy is guaranteed after the rail is fixed (after the rail screws are tightened and the rail is pressed against the reference surface).
• Slight bending of the rail is corrected when the rail is fixed, so it causes no problem in use.

Grease

• Standard grease at shipment: pre-packed with lithium soap-based grease (Multemp PS No. 2, Kyodo Yushi).
• When lubrication unit MX is selected, the standard grease is TOUGHLIX GREASE MP2 (JX Nippon Oil & Energy (now ENEOS)).
• Greasing with a different grease brand is not recommended. Use grease of the same brand.
• Apply grease directly to the rail. After applying, move the block to spread the grease.

Grease nipple position when lubrication unit MX is selected

• Miniature types have no grease nipple or lubrication hole.
• When lubrication unit MX is selected: with the reference surface facing you, the grease nipple is fitted in the orientation shown below.

Lubrication unit

• Advantages of lubrication unit MX
• Contains a built-in oil-impregnated porous core component.
• Achieves long-term maintenance-free operation.
• Reduces maintenance costs.
• Ideal for locations where lubrication is impossible by design.

Other

Side seals are not available separately as standard parts.

• Additional machining
• Specification

MC: Notes

Rail counterbored holes → tapped holes

• Changes the counterbored holes for fixing the guide rail to tapped holes.
• Not applicable to H6 with L 101 or more, H8 with L 131 or more, H10 with L 276 or more, H13 with L 471 or more, H16 with L 671 or more, or H20 with L 701 or more.
• See the table below for the tapped hole size after the change.

RLC

• LLC: left end face cut
• RLC: right end face cut
• Cuts the end face of the rail.
• The rail is cut with the marked side facing you (reference surface at the back).

(as shown in the image on the left)

• See the table below for the length of rail to be cut.

• The overall length is shortened by the amount cut.
• Example: the L dimension of SSELB13-95-LLC becomes 90 mm.
• Applicable to fixed-length types (standard rail lengths) only.
• Not applicable to H6, H8 or H20.

WC

Dual-axis parallel use

• Specify when using two axes in parallel.
• Keeps the height pair variation of H between the two rails within 15 µm.
• Shipped as a matched set of 2 rails.
• Order an even number of rails. (The number of sets cannot be specified.)
• Applicable to high grade only.
• Not applicable to low-temperature black chrome plated products.
• Not applicable to H6, H8 with L 145 or more, H10 with L 295 or more, or H13 with L 495 or more.
• B3
• B4
• B3: additional block (3 in total)
• B4: additional blocks (4 in total)
• 3-block specification
• 4-block specification
• Shipped with 3 (4) blocks mounted.
• There is a minimum length limit for L (rail length).
• See the table "Minimum rail length when B3 or B4 is specified" below.
• Specify the part number as a 1-block type.
• (× SSEL2B10-215-B4)
• B4 (4 blocks) is not applicable to H6 or H8.
• Not applicable to low-temperature black chrome plated products.

Minimum rail length when B3 or B4 is specified

Related parts: part number cross-reference

There are no bellows compatible with MISUMI linear guides.

• Industry-standard long block type. Consider the light-preload type, which offers excellent accuracy and rigidity, first. Manufactured by Suruga Production Platform Co., Ltd. Suruga Production Platform builds its business on precision machining technology that requires micron-level accuracy.
• Suruga precision machine parts are also used in cutting-edge fields such as the aerospace and automotive industries.

If you require the "dual-axis parallel use" additional machining, order an even number of rails (2, 4, etc.).