Our website upgrade are completed! Latest improvements are now LIVE to enhance your ordering experience. You may be logged out due to the update. Please take note to login again or reset credentials if needed. More details here.

How can we improve?

How can we improve?

Comments

Name (Optional)

E-mail Address (Optional)

Tel (Optional)

While we are not able to respond directly to comments submitted in this form, the information will be reviewed for future improvement.
Customer Privacy Policy

Thank you for your cooperation.

While we are not able to respond directly to comments submitted in this form, the information will be reviewed for future improvement.
Please use the inquiry form.

Customer Privacy Policy

Gas Springs - Mounting Orientation Free, GSKSF Type

Volume Discount

MISUMI

Gas spring, Free attaching direction type, GSKSF type.

(i)Caution

Since the speed cannot be adjusted with gas springs, please select an air cylinder when speed adjustment is required. When confirming the actual reaction force of gas spring, please purchase at the minimum unit and select accordingly.
Please check the content on our website as the PDF does not contain the most up-to-date information.

Part Number

Configured Part Number is shown.

Drawing/Specifications
3D Preview
Part Numbers
More Information
Catalog

Part	Material	Surface Treatment
Cylinder	JIS STKM11A	Paint (Black)
Rod	1020 Carton Steel	Gas Soft Nitriding Treatment
Bushing	Polyacetal Resin (White)	-
Gas	Nitrogen Gas (N₂)	-

Specification Table

Part Number

GSKSF15050-150

Part Number		Max. Length Lmax	Min. Length Lmin	Stroke	Gas Reaction Force (20°C)					A	B	C	D	G	H	Applicable Mounting Bracket	Weight (g)
Type	No.				Lmax-10 mm Stroke		Lmax-(S) mm Stroke
Type	No.				N	kgf	N	kgf	(S)
GSKSF	14050-30	181	131	50	27	2.8	35	3.6	40	14	7	15	6.5	R8	110	GSSB6A	83
	14050-90				85	8.7	109	11.1									82
	14050-150				147	15.0	189	19.3									82
	14050-190				186	19.0	239	24.4									82
	14050-210				206	21.0	264	26.9									83
	14070-90	221	151	70	81	8.3	109	11.1	60						130		94
	14070-105	221	151		104	10.6	124	12.6	41.5						130		94
	14070-110	280	210		107	10.9	144	14.7	60			24			181		119
	14070-200	221	151		196	20.0	258	26.3	60			15			130		96
	14090-70	261	171	90	69	7.0	95	9.7	80						150		109
	14090-80				79	8.1	109	11.1									108
	14090-90				88	9.0	122	12.4									109
	14090-150				147	15.0	203	20.7									108
	14090-200				196	20.0	271	27.6									107
	14100-80	281	181	100	76	7.8	106	10.8	90						160		114
	14100-110				110	11.2	153	15.6									112
	14100-200				196	20.0	273	27.8									113
	18090-270	261	171	90	263	26.8	332	33.9	80	18	8						141
	18100-330	281	181	100	324	33.0	411	41.9	90								149
	18110-220	380	270	110	214	21.8	272	27.7	100			24	8.5	R10	240	GSSB8A GSSB8B GSSB8C GSSB8D GSSB8E	200
	18150-270	475	325	150	267	27.2	348	35.5	140						295		252
	18150-380	475	325	150	374	38.1	487	49.7	140						295		252
	22080-200	279	199	80	196	20.0	233	23.8	70	22	10				170		212
	22080-250	279	199	80	246	25.1	292	29.8	70						170		215
	22096-400	306	210	96	392	40.0	477	48.7	86						181		230
	22100-430	375	275	100	427	43.6	484	49.4	90						246		267
	22142-310	472	330	142	304	31.0	348	35.5	125						301		322
	22147-150	412	265	147	147	15.0	181	18.5	130						236		289
	22147-240	412	265	147	240	24.5	295	30.1	130						236		290
	22150-350	464	314	150	343	35.0	406	41.4	140						285		319
	22200-490	600	400	200	481	49.1	624	63.6	190						371		424
	22200-540	600	400	200	534	54.5	693	70.7	190						371		424
	22235-150	580	344.5	235.5	141	14.4	177	18.1	206						315.5		386
	22235-250				248	25.3	311	31.7									387
	22235-350				343	35.0	431	44.0									385
	22235-510				507	51.7	637	65.0									389
	22243-220	627	384	243	214	21.8	273	27.8	215						355		424
	22243-480	627	384	243	472	48.1	603	61.5	215						355		424
	22270-380	670	400	270	374	38.1	464	47.3	240						371		437
	22270-560	670	400	270	553	56.4	686	70.0	240						371		441
	22356-220	833	476.5	356.5	216	22.0	280	28.6	350						447.5		525
	22356-350	833	476.5	356.5	345	35.2	447	45.6	350						447.5		527
	26300-820	700	400	300	812	82.8	1100	112.2	275	25.4	12.5	20			374.5		661
	26300-930	700	400	300	927	94.6	1256	128.1	275	25.4	12.5	20			374.5		665

Part Number

CAD Data download and 3D preview are not available because the part number has not yet been determined.

*In order to open the CAD Data download and 3D preview screen, the part number must be fixed.
Please confirm the part number from "Specification / Dimension"on the left side, and then perform the CAD Data Download / 3D Preview operation.

CAD Download

: 30; 45; 60

Part Number
GSKSF14050-30
GSKSF14050-90
GSKSF14050-150
GSKSF14050-190
GSKSF14050-210
GSKSF14070-90
GSKSF14070-105
GSKSF14070-110
GSKSF14070-200
GSKSF14090-70
GSKSF14090-80
GSKSF14090-90
GSKSF14090-150
GSKSF14090-200
GSKSF14100-80
GSKSF14100-110
GSKSF14100-200
GSKSF18090-270
GSKSF18100-330
GSKSF18110-220
GSKSF18150-380
GSKSF22080-200
GSKSF22080-250
GSKSF22096-400
GSKSF22100-430
GSKSF22147-150
GSKSF22147-240
GSKSF22150-350
GSKSF22200-490
GSKSF22200-540
GSKSF22235-150
GSKSF22235-250
GSKSF22235-350
GSKSF22235-510
GSKSF22243-220
GSKSF22243-480
GSKSF22270-380
GSKSF22270-560
GSKSF22356-220
GSKSF22356-350
GSKSF26300-820
GSKSF26300-930

Standard Unit Price	Minimum order quantity	Volume Discount	Days to Ship	Min. Length Lmin (mm)	Gas Reaction Force (at 20°C) at Max. Length -10mm (N)	Gas Reaction Force (at 20°C) , at Min. Length +10mm (N)	Stroke S (mm)	Rod Dia. d (Ø)	Cylinder Dia. D (Ø)	Max. Length Lmax (mm)
MYR 216.30	1 Piece(s)	Available	6 Day(s) or more	131	27	35	50	7	14	181
MYR 216.30	1 Piece(s)	Available	6 Day(s) or more	131	85	109	50	7	14	181
MYR 216.30	1 Piece(s)	Available	68 Day(s) or more	131	-	189	50	7	14	181
MYR 216.30	1 Piece(s)	Available	6 Day(s) or more	131	186	239	50	7	14	181
MYR 216.30	1 Piece(s)	Available	6 Day(s) or more	131	206	264	50	7	14	181
MYR 216.30	1 Piece(s)	Available	6 Day(s) or more	151	81	109	-	7	14	221
MYR 216.30	1 Piece(s)	Available	23 Day(s) or more	151	104	124	-	7	14	221
MYR 236.60	1 Piece(s)	Available	6 Day(s) or more	210	107	144	-	7	14	280
MYR 216.30	1 Piece(s)	Available	23 Day(s) or more	151	196	258	-	7	14	221
MYR 216.30	1 Piece(s)	Available	73 Day(s) or more	171	69	95	90	7	14	261
MYR 216.30	1 Piece(s)	Available	6 Day(s) or more	171	79	109	90	7	14	261
MYR 216.30	1 Piece(s)	Available	6 Day(s) or more	171	88	122	90	7	14	261
MYR 216.30	1 Piece(s)	Available	6 Day(s) or more	171	-	203	90	7	14	261
MYR 216.30	1 Piece(s)	Available	6 Day(s) or more	171	196	271	90	7	14	261
MYR 216.30	1 Piece(s)	Available	6 Day(s) or more	181	76	106	-	7	14	281
MYR 216.30	1 Piece(s)	Available	6 Day(s) or more	181	110	153	-	7	14	281
MYR 216.30	1 Piece(s)	Available	6 Day(s) or more	181	196	273	-	7	14	281
MYR 224.30	1 Piece(s)	Available	6 Day(s) or more	171	263	332	90	-	-	261
MYR 224.30	1 Piece(s)	Available	6 Day(s) or more	181	324	411	-	-	-	281
MYR 236.60	1 Piece(s)	Available	6 Day(s) or more	270	214	272	110	-	-	380
MYR 236.60	1 Piece(s)	Available	6 Day(s) or more	325	374	487	150	-	-	475
MYR 224.30	1 Piece(s)	Available	6 Day(s) or more	199	196	233	-	-	-	279
MYR 224.30	1 Piece(s)	Available	6 Day(s) or more	199	246	292	-	-	-	279
MYR 224.30	1 Piece(s)	Available	6 Day(s) or more	210	392	477	96	-	-	306
MYR 236.60	1 Piece(s)	Available	6 Day(s) or more	275	427	484	-	-	-	375
MYR 224.30	1 Piece(s)	Available	6 Day(s) or more	-	-	181	147	-	-	412
MYR 224.30	1 Piece(s)	Available	6 Day(s) or more	-	240	295	147	-	-	412
MYR 224.30	1 Piece(s)	Available	6 Day(s) or more	314	343	406	150	-	-	464
MYR 236.60	1 Piece(s)	Available	6 Day(s) or more	400	481	624	200	-	-	-
MYR 236.60	1 Piece(s)	Available	6 Day(s) or more	400	534	693	200	-	-	-
MYR 224.30	1 Piece(s)	Available	6 Day(s) or more	344.5	141	177	235.5	-	-	580
MYR 224.30	1 Piece(s)	Available	6 Day(s) or more	344.5	248	311	235.5	-	-	580
MYR 224.30	1 Piece(s)	Available	6 Day(s) or more	344.5	343	431	235.5	-	-	580
MYR 224.30	1 Piece(s)	Available	6 Day(s) or more	344.5	507	636	235.5	-	-	580
MYR 239.50	1 Piece(s)	Available	6 Day(s) or more	384	214	273	243	-	-	627
MYR 239.50	1 Piece(s)	Available	6 Day(s) or more	384	472	603	243	-	-	627
MYR 239.50	1 Piece(s)	Available	6 Day(s) or more	400	374	464	-	-	-	670
MYR 239.50	1 Piece(s)	Available	6 Day(s) or more	400	553	686	-	-	-	670
MYR 224.30	1 Piece(s)	Available	6 Day(s) or more	476.5	216	280	356.5	-	-	833
MYR 224.30	1 Piece(s)	Available	6 Day(s) or more	476.5	345	447	356.5	-	-	833
MYR 239.50	1 Piece(s)	Available	6 Day(s) or more	400	812	1100	300	-	25.4	700
MYR 239.50	1 Piece(s)	Available	6 Day(s) or more	400	927	1256	300	-	25.4	700

About Gas Spring

· About Gas Spring
A compressed gas (nitrogen gas: non-flammable) is sealed in a closed cylinder,
the reaction force of this gas is used as a spring. Despite its compact size,
this gas spring can provide a small spring constant with a large initial load,
making it suitable for a wide range of applications, including various types of machinery,
furniture, automobiles, and office automation equipment.
· In spite of its size and weight, large spring (reaction) force can be obtained.
· Spring (reaction) force is almost constant throughout its stroke.
· Can be designed to meet specific requirements for a wide range of applications.

· Features of mounting orientation free type gas spring
1. Nitrogen gas (non-combustible) is sealed in gas chamber C with a free moving piston
intervening, and gas reaction force is used as a spring.
2. Gas chamber C has a constant reaction force in extending direction since it pressurizes
oil chamber AB. Therefore the size of the reaction force depends on the inner pressure of
gas chamber C.
3. When rod moves from the predetermined position, oil in chamber AB moves through
orifice hole of the piston.
4. The rod volume change in the cylinder is adjusted by the change of gas chamber C.
5. Usable at any angle of 360°.

Gas Springs – Mounting Orientation Free Type

[ ! ] Precautions for Use (Common to FGS, FGSS, HFGSS, FRGSS, GSSF, and GSKSF)
· Pay attention to the temperature of gas springs during use. Do not store for a prolonged duration. Otherwise, the seal will deteriorate prematurely, causing a decrease in reaction force.
(Product temperature range: FGS, FGSS, GSSF, GSKSF: -20°C to 60°C / HFGSS: -20°C to 80°C / FRGSS: -30°C to 80°C. Some products have different temperature ranges. Please check the relevant page.)
· Gas reaction forces have slight tolerances that vary depending on the product and may change with temperature.
· Reaction force may decrease depending on the operating environment and times of use. Please replace it when it cannot reach the necessary reaction force.
· Do not store or use in environments where the rod may rust, or in chemical atmosphere. Furthermore, do not paint the gas spring.
· Do not damage the cylinders and rods. If rods are wrapped with tape or plastic string, adhesives or fibers are stuck to its surface and then, into the inside, resulting in gas / oil leakage.
Be sure to see if there is no rust, scratches, adhesives or foreign objects on the rod before use.

· Do not apply forces like bending load and torsion to the cylinder and rod. Receiving load only with gas springs results in unbalanced load, which causes early deterioration of the seal, abnormal noise, and gas / oil leakage. To ensure proper use, please note the followings:

For Rotary Motion
· Increase the strength of the door itself to prevent the gas spring mounting part from tilting.
· Ensure to prevent gaps and looseness on the hinge to remain the rattling-free state.
For Linear Motion
· Install guide rails, etc. to prevent lateral force to the gas spring.
· Use two or more gas springs as necessary to ensure that the force is applied evenly.
· Do not extend the gas spring beyond its maximum length. Even in the maximum stroke (during compression), it must remain about 10 mm away from the stroke end.
Do not extend and compress at high speeds (with 1 m/s or more).
· Use FGS with the cylinder side oriented upward and the rod side oriented downward, so that internal oil protects the rubber seal.
For FGS and FRGSS, do not tilt more than 60 degrees. When it is necessary to temporarily store, do not tilt more than 60 degrees.
· Although there is no restriction in the use angle for the FGSS, HFGSS, GSSF, and GSKSF type, downward use of the rod is recommended.

Selection Supporting Information

About Initial Selection

1. Calculate the necessary reaction force (Fg) through the following formula, then find out possible part numbers.

Fg =	W × L2
	L3

Fg: Necessary reaction force (at maximum length)
W: Weight of doors, etc.
L2: Horizontal distance between fulcrum (door hinge, etc.,) and the center of gravity
L3: Vertical distance between fulcrum (door hinge, etc.,) and the axis of gas spring

2. Select Fg x 1.1 or more for the gas spring reaction force.

Gas reaction force has a tolerance of about ±15%.

3. If required reaction force (F x 1.1) is larger than the reaction force at the maximum length of gas spring
-( ) mm, use 2 or more springs.

4. Reaction forces are designed at 20°C. Reaction forces increase or decrease as the temperature changes.

About Final Selection
· The load may vary depending on door angles or gas spring mounting positions.
Calculate the reaction force moment based on the subject design drawing.
· When the door is stopped in the horizontal position, it is held in place by the gas spring and lifting force.
The required lifting force (Fh) can be determined by considering the balance of the moment
at the center of rotation. The moment can be calculated by multiplying the load by the length of the arm.

Fg: Necessary reaction force (at maximum length)
Fh: Lifting force
W: Weight of doors, etc.
L1: Distance between the fulcrum and the operating position
L2: Horizontal distance between fulcrum (door hinge, etc.,) and the center of gravity
L3: Vertical distance between fulcrum (door hinge, etc.,) and the axis of gas spring
θ: The angle between the perpendicular line from the fulcrum and the axis of the gas spring
n: Number of gas springs used

Gas reaction force at the maximum length
- 10 (5) mm and the maximum length (Lmax.)
- (S) mm are listed in this catalog.
Gas reaction force generally changes proportionately.
If the gas reaction force on a certain stroke is required,
connect the 2 points with a straight line as shown in
the table below and read the value on the stroke to conjecture.

[ ! ] f = Internal Sliding Resistance (Theoretical Value x 0.1)

Calculating the moment when the door is fully open

Fh=	(W×L2−n×Fg×cos⁡(𝜃)×L3)
	L1

· Adjust the lifting force (Fh) determined using the above formula to be in the -2 to -7 kgf range.
When this lifting force (Fh) is positive, the door will descend due to its weight if the gas reaction
force is not applied. A latch or other fastening is required to hold the door open. Conversely,
if the negative value of the operating force is large, a large force is required to close the door.

Calculating the moment when the door is fully open
· As with the fully open state, the lifting force (Fh) when the gas spring is installed and closed is calculated using

Fh=	(W×L2−n×Fg×cos⁡(𝜃)×L3)
	L1

· Adjust Fh force to be in the 2 to 7 kgf range. When this lifting force (Fh) is negative, the door will open
using only the force of the gas spring. For this reason, the door must be secured with a stopper,
magnet, etc.

· The lifting force varies depending on the distance between the gas spring and the fulcrum and the gas
reaction force depending on whether the door is open or closed, but the calculation method is the same
whether the door is fully open or fully closed.
· At some point during the opening and closing of the door, its weight moment around the fulcrum and
the gas spring's gas reaction force moment will balance out, resulting in a lifting force of 0 (zero).
If the sign of the lifting force is the same (positive, negative) when the door is fully open and when
fully closed, no balance point exists.

· Please review the calculation results above, and select the best option by repeating the calculation process,
changing the installation point or gas spring, etc. exists.

Product TOP

Basic Information

Gas Spring Type	Free Mounting Direction	Rod Material	Alloy Tool Steel (SKS Equivalent)	Cylinder Material	STKM11A (Carbon Steel Hollows for Machine Structural Use)
Mounting Orientation	360°	Type	Gas Springs

Configure

42 Part Numbers

View Part Numbers

Configure Remaining Specifications

Completed

Specification/Dimensions

Min. Length Lmin(mm)
131

151

171

181

199

210

270

275

314

325

344.5

384

400

476.5
Clear
Gas Reaction Force (at 20°C) at Max. Length -10mm(N)
27

69

76

79

81

85

88

104

107

110

141

186

196

206

214

216

240

246

248

263

324

343

345

374

392

427

472

481

507

534

553

812

927
Clear
Gas Reaction Force (at 20°C) , at Min. Length +10mm(N)
35

95

106

109

122

124

144

153

177

181

189

203

233

239

258

264

271

272

273

280

292

295

311

332

406

411

431

447

464

477

484

487

603

624

636

686

693

1100

1256
Clear
Stroke S(mm)
50

90

96

110

147

150

200

235.5

243

300

356.5
Clear
Rod Dia. d(Ø)
7
Clear
Cylinder Dia. D(Ø)
14

25.4
Clear
Max. Length Lmax(mm)
181

221

261

279

280

281

306

375

380

412

464

475

580

627

670

700

833
Clear
type
- GSKSF
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

6 Day(s) or Less

23 Day(s) or Less

68 Day(s) or Less

73 Day(s) or Less
Clear

Specify Alterations

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Additional Products in this Category

Tech Support

: Technical Inquiry

How can we improve?

Gas Springs - Mounting Orientation Free, GSKSF Type

(i)Caution

Specification Table

Part Number

About Gas Spring

Selection Supporting Information

Basic Information

Configure

Specification/Dimensions

Min. Length Lmin(mm)

Gas Reaction Force (at 20°C) at Max. Length -10mm(N)

Gas Reaction Force (at 20°C) , at Min. Length +10mm(N)

Stroke S(mm)

Rod Dia. d(Ø)

Cylinder Dia. D(Ø)

Max. Length Lmax(mm)

type

CAD

Days to Ship

Specify Alterations

Additional Products in this Category

Tech Support

Payment Method

About MISUMI

About this Website

Useful Tools

Customer Service

Social Media

MISUMI Contact 9am – 6pm (Mon – Fri) * Order cut-off time is 5pm, 9am – 1pm(Sat) * Order cut-off time is 12pm