Specifications: MUR20X6SB is an AirTAC double-acting cylinder with a 20 mm bore, 6 mm stroke, a magnetic piston, and male-threaded rod end.
Product Catalog
Download Airtac Product Catalog (PDF)
Download AirTAC 2022 Sensor and Mounting Compatibility Guide (PDF)
Download 2022 cylinder installation and weight tables (PDF)
For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.
Model Code Explained
Code
Meaning for This Model
MUR
double-acting cylinder
20
20 mm bore
X6
6 mm nominal stroke
S after stroke
Magnetic piston selected
B
male-threaded rod end
Blank mounting suffix
No optional mounting bracket selected
R in series prefix
Axial mounting; applies to bores 12, 16 and 20 mm
Configuration Notes
The specified 6 mm stroke is not a listed standard stroke. The catalog permits intermediate strokes using the next larger standard body envelope.
Technical Specifications
Parameter
Details
Action
double-acting cylinder
Working medium
Air filtered through a 40 μm filter or finer
Operating pressure
0.15–0.7 MPa
Proof pressure
1.2 MPa; a proof-test rating, not the continuous operating limit
Ambient and fluid temperature
−20 to 70 °C
Piston speed
30–500 mm/s
Stroke tolerance
+1.0 / 0 mm
Cushioning
Bumper
Air connection
M5 × 0.8
Design standard
JIS
Product Features
The body can be secured from four directions, and multiple cylinders can be mounted alongside one another.
A front locating boss aids accurate positioning. The precision-finished bore is hard anodized.
The compact double-lip piston seal retains lubricant. Magnetic variants use the body switch groove; the 4 mm bore has no magnetic option.
Dimensions for This Bore and Configuration
Dimensions are in millimeters unless a thread, angle or tolerance is stated. Letter labels follow the 154–157 printed-page drawings in the 2022 Chinese catalog. A base letter value is not automatically an overall length; use its stated stroke relationship.
Parameter
Details
A
29 mm
AB
4.5 mm
AC
24.5 mm
B
25 mm
C
38.5 mm
CA
21 mm
D
10 mm
E
M5 × 0.8
EA
7 mm
H
8 mm
L
5.5 mm
LB
13.5 mm
LC
15.5 mm
M
9 mm
MA
9 mm
P
M5 × 0.8
PA
9 mm
PB
5.5 mm
Axial hole diameter
5.5 mm
Counterbore depth
9 mm
Male rod AB
18.5 mm
Male rod D
10 mm
Male rod DA
Not listed for this size
Male rod E
M8 × 1.25
Male rod EA
12 mm
Male rod EB
14 mm
Male rod F
12 mm
Male rod FA
6 mm
Male rod H
8 mm
Stroke-dependent Drawing Relationships
Parameter
Details
A outline
A + stroke
AC outline
AC + stroke
KB longitudinal pitch
Not used by the axial mounting view
Stroke used in the order code
6 mm
For this intermediate stroke, the table uses the next larger standard body: 10 mm. Drawing formulas remain those of the catalog; do not infer a shorter body by interpolation.
Construction and Materials
Parameter
Details
1 Piston rod
Stainless steel or hard-chrome-plated S45C steel
2 C-ring
Spring steel
3 Front cover
Aluminum alloy
4 Rod seal
NBR
5 O-ring
NBR
6 Bumper
TPU; 12–20 mm only
7 Body
Aluminum alloy
8 Magnet holder
Brass at 12 mm; aluminum alloy at the other illustrated sizes
9 Magnet washer
NBR
10 Magnet
Sintered NdFeB
11 Piston
Brass at 12/16 mm; aluminum alloy at the other illustrated sizes
12 Piston seal
NBR
13 Rear cover
Not separate at 12/16 mm; aluminum alloy in the other illustrated construction
Item numbers identify the catalog sectional drawing. They are component references, not spare-part order codes or package quantities.
Matching Accessories and Mounting
Parameter
Details
Mounting arrangement
Axial mounting is selected by the R prefix.
DMSH / CMSH / EMSH
H-profile magnetic switches for magnetic MU 20 mm cylinders; no separate cylinder mounting bracket is required for the switch groove
Accessory codes are listed for selection. Optional brackets, rod joints and switches are separate items unless the selected code or the stated pin note expressly identifies them. Component item numbers do not specify purchase quantities.
Stroke and Option Selection
Parameter
Details
Standard strokes for this bore/action
5, 10, 15, 20, 25, 30, 35, 40, 45, 50 mm
Intermediate strokes
The catalog allows a nonstandard intermediate stroke with the outer dimensions of the next larger standard stroke; this does not extend the maximum allowable stroke.
Magnetic selection
Select the magnetic option before ordering a position switch; electrical type, cable and connector are selected separately.
Selection, Installation and Operation
Select bore from the required thrust and available pressure; then check stroke, load direction, mounting, cushioning and sensing. The general catalog load-factor references are at most 0.7 for static/slow work and at most 0.5 for 50–500 mm/s motion. They do not replace the load and guide checks for this cylinder.
Keep the piston rod and load aligned. Support lateral or eccentric loads with an appropriate guide; avoid applying bending force or tightening torque through the rod or guide.
Use clean filtered air. Prevent freezing, water, dust and corrosive substances from entering the cylinder. The cylinder is prelubricated; if lubrication is introduced, use additive-free ISO VG32 oil and continue that lubrication.
Start with the speed controller restricted, then open it gradually. Choose the circuit and flow-control direction for the action and load; a double-acting meter-out circuit is a general reference, not a guarantee of equal speed or precise stopping.
Isolate the air and electrical supplies and release trapped pressure before maintenance. Check the mounting and retained parts before repressurizing. A C-ring must be fully seated before operation.
Circuit Selection Reference at 500 mm/s
Parameter
Details
Reference bore
20 mm
Effective flow area at the reference speed
.8 mm²
Tube outside / inside diameter
6 / 4 mm
Example speed controller
PTLM5
Example silencer
BSLM5
Example solenoid valves
5V110M5 / 5V120M5
Example air-piloted valves
4A110M5 / 4A120M5
The general 2022 selection table gives these circuit examples for this bore at a theoretical 500 mm/s reference speed. They are not included accessories, a guaranteed achieved speed, or a statement that every example screws directly into this cylinder. Match the actual port thread, action, tubing, valve capacity and operating conditions.
Optional magnetic sensors and matching cables
H-profile: CMSH — standard/A05 reed sensorsTwo-wire reed operation at 5–240 V AC/DC.CMSH-020, CMSH-030, CMSH-050, CMSH-100, CMSH-M08, CMSH-M08010, CMSH-M08020, CMSH-M08030, CMSH-M12, CMSH-M12010, CMSH-M12020, CMSH-M12030, A05-CMSH-020, A05-CMSH-030, A05-CMSH-050, A05-CMSH-100
H-profile: CMSH — high-temperature reed sensors (final -H suffix)Two-wire reed operation at 5–240 V AC/DC.CMSH-020-H, CMSH-030-H, CMSH-050-H, CMSH-100-H, CMSH-M08-H, CMSH-M08010-H, CMSH-M08020-H, CMSH-M08030-H, CMSH-M12-H, CMSH-M12010-H, CMSH-M12020-H, CMSH-M12030-H
H-profile: DMSH — two-wire electronic sensorsTwo-wire electronic operation at 10–28 V DC.DMSH-020, DMSH-030, DMSH-050, DMSH-100, DMSH-M08, DMSH-M08010, DMSH-M08020, DMSH-M08030, DMSH-M12, DMSH-M12010, DMSH-M12020, DMSH-M12030, DMSH-020-W, DMSH-030-W, DMSH-050-W, DMSH-100-W, A05-DMSH-020, A05-DMSH-030, A05-DMSH-050, A05-DMSH-100, A06-DMSH-020, A06-DMSH-030, A06-DMSH-050, A06-DMSH-100
H-profile: DMSH — NPN electronic sensorsNPN three-wire output with a 5–30 V DC supply.DMSH-N020, DMSH-N030, DMSH-N050, DMSH-N100, DMSH-NM08, DMSH-NM08010, DMSH-NM08020, DMSH-NM08030, DMSH-NM12, DMSH-NM12010, DMSH-NM12020, DMSH-NM12030, DMSH-N020-W, DMSH-N030-W, DMSH-N050-W, DMSH-N100-W
H-profile: DMSH — PNP electronic sensorsPNP three-wire output with a 5–30 V DC supply.DMSH-P020, DMSH-P030, DMSH-P050, DMSH-P100, DMSH-PM08, DMSH-PM08010, DMSH-PM08020, DMSH-PM08030, DMSH-PM12, DMSH-PM12010, DMSH-PM12020, DMSH-PM12030, DMSH-P020-W, DMSH-P030-W, DMSH-P050-W, DMSH-P100-W
H-profile: EMSH — miniature two-wire sensorsMiniature two-wire electronic operation at 10–28 V DC.EMSH-020, EMSH-030, EMSH-050, EMSH-100, EMSH-M08, EMSH-M08010, EMSH-M08020, EMSH-M08030, EMSH-M12, EMSH-M12010, EMSH-M12020, EMSH-M12030, EMSH-020-W, EMSH-030-W, EMSH-050-W, EMSH-100-W, EMSH-M08-W, EMSH-M08010-W, EMSH-M08020-W, EMSH-M08030-W, EMSH-M12-W, EMSH-M12010-W, EMSH-M12020-W, EMSH-M12030-W, A05-EMSH-020, A05-EMSH-030, A05-EMSH-050, A05-EMSH-100, A06-EMSH-020, A06-EMSH-030, A06-EMSH-050, A06-EMSH-100
Two-wire mating cables (B)For a matching M8 or M12 two-wire male sensor; ordered separately.F-ECM08B020, F-ECM08B030, F-ECM08B050, F-ECM08B100, F-ECM12B020, F-ECM12B030, F-ECM12B050, F-ECM12B100
Three-wire mating cables (C)For a matching M8 or M12 NPN/PNP male sensor; ordered separately.F-ECM08C020, F-ECM08C030, F-ECM08C050, F-ECM08C100, F-ECM12C020, F-ECM12C030, F-ECM12C050, F-ECM12C100
Choose an H-profile sensor for the magnetic MU or MUR cylinder, then match its electrical circuit and cable. These separately ordered options are alternatives, not a required set. The H in CMSH/DMSH/EMSH identifies the sensor profile; a final -H on a CMS order code instead selects the high-temperature reed version.
CMSH reed sensors are limited to 100 mA, 10 W and 200 Hz, with no internal consumption or leakage. Standard/A05 voltage drop is at most 2.5 V at 100 mA DC; versions with the final -H suffix have no residual voltage or indicator LED.
Two-wire DMSH and EMSH require 2.5–100 mA loads, up to 2.8 W and 1,000 Hz. Maximum consumption, residual voltage and leakage are 3 mA, 3.5 V and 0.06 mA respectively.
NPN/PNP DMSH outputs are rated to 30 V / 200 mA, 6 W and 1,000 Hz. Maximum consumption, residual voltage and leakage are 5 mA, 0.7 V and 0.01 mA respectively. Check controller input compatibility as well as load ratings.
Sensor and female-cable endings 020/030/050/100 mean 2/3/5/10 m. M08/M12 sensors have M8/M12 male connectors on 0.5 m leads; M08010/M08020/M08030 and M12010/M12020/M12030 give 1/2/3 m leads. Lead length does not depend on cylinder stroke.
Match female cables to the male connector size and wire count; direct-lead sensors need none. B pinout: 1 brown (+), 4 blue (−), 3 unused. C pinout: 1 brown (+), 3 blue (−), 4 black output. Check the mating cable and connector ratings separately.
A05 flex-resistant robotics cable and A06 oil-resistant flex cable have a recommended minimum bend radius of 19 mm. Both are two-wire direct-lead types, without M8/M12, NPN/PNP or W options; A05-CMSH also excludes the final high-temperature -H suffix. W means waterproof: DMSH-W has direct leads only; the listed EMSH-W options also include connectors.
Sensor temperature limits are −10 to +70°C, or −10 to +125°C for CMSH versions with the final -H suffix. The standard MU/MUR cylinder remains limited to +70°C. Ordinary, high-temperature and A05 sensors are IP64; W/A06 are IP68. These ratings do not extend to the cylinder, connectors or whole assembly; use their common limits.
CMS has no protection circuit; DMS/EMS have reverse-polarity and surge protection, and EMS also has temperature-overload protection. Reed, two-wire electronic, NPN and PNP circuits are not interchangeable. Complete and insulate wiring before powering it; keep it separate from power/high-voltage wiring. For direct leads, connect brown and blue in series with the load on two-wire types; do not connect the switch alone across the supply. On three-wire types, brown is positive supply, blue is negative and black is output; connect an NPN load to positive and a PNP load to negative.
Install the selected H-profile sensor in its matching switch groove. Loosen the locking screw so it does not project below the sensor base. Slide the sensor to the required position, then tighten. Set detection at the actuation-range centre. Recommended sensor-screw torque is 0.15–0.20 N·m, never over 0.25 N·m; these are not cylinder mounting torques. Prevent impacts; keep cables free of strain and avoid unnecessary movement or bending. Observe the stated bend-radius guidance for flex-resistant versions, and inspect fixings, cables and indication.
Keep ordinary sensors dry and do not immerse waterproof types for long periods. Avoid explosive gas, aggressive chemicals, sudden temperature changes, welding interference and magnetic debris. Provide suitable protection for A05 cables exposed to heat, dust, water or oil, and for A06 cables exposed to weld spatter.
Optional air connections, tubing and controls
For the 6 mm OD tubing in the circuit reference in this description, choose a straight fitting or an A-type controller at each cylinder port. Use straight fittings at the valve A/B ports and keep the two chamber lines separate.
PC6M5: M5×0.8 male × 6 mm tube ODStraight connection at either cylinder port or the selected valve A/B work ports; no speed adjustment
PTL6M5A-M: M5×0.8 male × 6 mm tube OD; mini A-typeCylinder-port meter-out speed control instead of the straight fitting
PC601: PT1/8 male × 6 mm tube ODOnly for the separate 4A air-pilot port when its pilot line uses 6 mm OD tubing
US98A060040100MBU: polyester polyurethane; 6 mm OD × 4 mm ID; blue, 100 m rollOptional straight tubing example; cut to the required installed length
UE95A060040100MBU: polyether polyurethane; 6 mm OD × 4 mm ID; blue, 100 m rollOptional straight tubing example; cut to the required installed length
5V110M5A050, 5V110M5A200, 5V120M5A050, 5V120M5A200: M5×0.8 female main ports; M5×0.8 female exhaust ports; terminal-cable version220 V AC solenoid direction control for extension and retraction
5V110M5B050, 5V110M5B200, 5V120M5B050, 5V120M5B200: M5×0.8 female main ports; M5×0.8 female exhaust ports; terminal-cable version24 V DC solenoid direction control for extension and retraction
5V110M5C050, 5V110M5C200, 5V120M5C050, 5V120M5C200: M5×0.8 female main ports; M5×0.8 female exhaust ports; terminal-cable version110 V AC solenoid direction control for extension and retraction
5V110M5E050, 5V110M5E200, 5V120M5E050, 5V120M5E200: M5×0.8 female main ports; M5×0.8 female exhaust ports; terminal-cable version24 V AC solenoid direction control for extension and retraction
5V110M5F050, 5V110M5F200, 5V120M5F050, 5V120M5F200: M5×0.8 female main ports; M5×0.8 female exhaust ports; terminal-cable version12 V DC solenoid direction control for extension and retraction
The A-type controller restricts flow from the cylinder port to the tube; reverse flow is free. Recommended cap-rotation torque is 0.05 N·m, not thread-tightening torque. Seat the M5 sealing gaskets correctly.
The listed gray fittings and controllers accept soft nylon or polyurethane tubing and are rated for 0–1 MPa and −20 to +70°C. Check tube insertion, wrench clearance and every connected part’s limits.
The 5V110 codes are single-solenoid spring-return valves; 5V120 codes are double-solenoid valves with memory. The final 050 or 200 selects a 0.5 m or 2 m terminal cable as part of the complete valve configuration. AC versions use 2.0 VA with +15%/−10% voltage tolerance; DC versions use 1.6 W with ±10% tolerance. These terminal-cable valves have dust protection; they are not DIN-plug versions.
The existing 4A110M5 and 4A120M5 pneumatic alternatives need one or two external pilot signals respectively through separate PT1/8 pilot ports. The listed pilot connection assumes 6 mm OD pilot tubing; match both ends of the pilot line and the actual control signal. Seal the tapered PT pilot threads with suitable thread sealant. Use only the chosen electrical or pneumatic control scheme.
With either listed valve family, the working circuit is limited to 0.15–0.7 MPa and −20 to +70°C, subject to any lower component limit.
Use the existing BSLM5 reference at the selected M5×0.8 valve exhaust ports R/S. Keep exhaust paths open; do not fit silencers to the cylinder working ports. Silencer limits are 0–1 MPa and −20 to +70°C.
The blue 100 m tube codes are purchasable packaging examples, not the required installed tube length. US98A is polyester polyurethane (−20 to +70°C); UE95A is polyether polyurethane (−40 to +70°C). Both listed standard sizes are rated to 1 MPa at 23°C; apply temperature derating and the lowest limit of the whole circuit. Avoid solvents, corrosive media and prolonged direct sunlight. Minimum bend radii for US98A/UE95A are 15/12 mm.Weight Reference
Estimated reference weight: 80.7 g. Based on the same family/bore catalog mass data and the stated configuration; it is not an AirTAC published weight for this exact variant or a measured weight.
For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.
Read
more
less
