Gortiflex® Bellows

Dynatect’s Gortiflex completely sealed bellows are constructed from a tube of elastomer with optional fabric reinforcement that is formed and vulcanized into a sealed cover with high-cycle durability for a wide variety of challenging applications.

This construction method allows for the use of multiple material selections and design attributes, while keeping costs relatively low compared to other solutions.

The elastomer and optional fabric can be engineered to be compliant to medical, high and low temperature, food-grade, outdoor, or other specialty applications. A zipper can be added for easy installation, internal guides can be added for bellows intended to protect spinning shafts/screws.

The standard shape is round but other shapes are possible with low-cost tooling (significantly less expensive than traditional molded bellows tooling). This allows for fast, customized, low volume production and prototypes with small upfront costs.

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Custom Gortiflex Bellows

Features & Benefits

Exceptionally durable molded cover
A zipper (plastic or brass) can be added for easy installation
Excellent extended-to-retracted ratio for a molded cover
No tooling fee for standard shapes (nominal tooling for special shapes)
Ideal for OEM use on both prototype models and new designs
Structural reinforcements can be added, such as internal and/or external wires
Resists moisture, liquid or chemical spray, contaminants and dirt
Suitable for outdoor environments with exposure to moisture, ice, sand, oil, UV radiation, and temperature variations (hot or cold)

Typical Applications

Rod/ball screw covers
Hydraulic and pneumatic actuators
Expansion joints
Piping penetration seals (see Gortiseal)
Compressor and engine intake and exhaust manifold connections
Fan duct connections
Silicone wafer production
And many more !

Profiles/Shapes

Round, Oval, Rectangular

Materials

Goralon® (CSM), Gorprene™ (Chloroprene), Nitrile, Butyl, Fluoroelastomer (FKM), EPDM and Silicone/Fiberglass
Fabric reinforcement options: nylon, para-aramid
Specialty materials for food-grade requirements, flame retardant (FR), temperature extremes, military spec.

Accessories & Mounting Options

Breather vents
Zipper
Internal guides
Internal or external wire reinforcements
Clamps
Mounting plates (split or solid)
Hook and loop fastener (for ends)

Standard Gortiflex Bellows Sizes

Preferred and Maximum Outer Diameters Based on Any Given Bellows Inner Diameter

The following charts show the preferred and maximum Outer Diameter (O.D.) for any given bellows Inner Diameter (I.D.) in inches. These are general guidelines, and subject to change based on other design parameters. Additional bellows inner diameters through 56 inches are available. Please consult Dynatect Sales for design assistance.

Note: dimension are in inches

Standard Materials

Inside Diameter (I.D.)	Preferred Outer Diameter (O.D.)	Maximum Outer Diameter (O.D.)	Maximum Bellows Depth
0.50	0.75	1.00	0.25
0.56	0.88	1.19	0.31
0.63	0.94	1.25	0.31
0.75	1.13	1.50	0.38
0.88	1.25	1.63	0.38
1.00	1.75	2.00	0.50
1.13	1.88	2.13	0.50
1.25	2.00	2.25	0.50
1.38	2.13	2.38	0.50
1.50	2.50	2.63	0.57
1.63	2.63	2.75	0.56
1.75	2.75	3.00	0.63
1.88	2.75	3.00	0.56
2.00	3.00	3.25	0.63
2.25	3.25	3.50	0.63
2.38	3.50	3.75	0.69
2.50	3.75	4.00	0.75
2.75	4.00	4.25	0.75
3.00	4.25	4.50	0.75
3.25	4.50	5.13	0.94
3.50	5.00	5.25	0.88
3.75	5.25	5.50	0.88
4.00	5.50	6.00	1.00
4.25	5.75	6.25	1.00
4.50	6.00	6.50	1.00
4.75	6.25	6.75	1.00
5.00	7.00	7.25	1.13
5.38	7.38	7.63	1.13
5.50	7.50	7.75	1.13
6.00	8.00	8.25	1.13
6.25	8.25	8.50	1.13
6.50	8.50	8.75	1.13
6.63	8.63	8.88	1.13
6.75	8.75	9.00	1.13
7.00	9.00	9.25	1.13
7.25	9.25	9.50	1.13
7.63	9.63	9.88	1.13
8.00	10.00	10.25	1.13
8.50	10.50	10.75	1.13
8.63	10.63	10.88	1.13
9.00	11.00	11.25	1.13
9.25	11.25	11.50	1.13
9.50	11.50	11.75	1.13
9.75	11.75	12.00	1.13
10.00	12.00	12.25	1.13
10.25	12.25	12.50	1.13
10.50	12.50	12.75	1.13
10.75	12.75	13.00	1.13
11.00	13.00	13.25	1.13
11.75	13.75	14.00	1.13
12.00	14.00	14.25	1.13
12.75	14.75	15.00	1.13
13.00	15.00	15.25	1.13
13.50	15.50	15.75	1.13
14.00	16.00	16.25	1.13
15.00	17.00	17.25	1.13
16.00	18.00	18.25	1.13
16.50	18.50	18.75	1.13
17.00	19.00	19.25	1.13
17.25	19.25	19.50	1.13
17.81	19.81	20.13	1.16
18.00	20.00	20.25	1.13
19.00	21.00	21.50	1.25
20.00	22.25	22.50	1.25
21.00	23.25	23.50	1.25
21.38	23.63	23.87	1.25
22.00	24.25	24.50	1.25
22.75	25.00	25.25	1.25
24.00	26.25	26.50	1.25
25.00	27.25	27.50	1.25
26.00	28.25	28.50	1.25
28.50	31.00	31.50	1.50
30.00	32.50	33.00	1.50
31.50	34.00	34.50	1.50
33.00	35.50	36.00	1.50
34.00	36.50	37.00	1.50
36.00	38.50	39.00	1.50
38.50	41.00	41.50	1.50
40.00	42.50	43.00	1.50
41.00	43.50	44.00	1.50
42.50	45.00	45.50	1.50
44.00	46.50	47.00	1.50
46.50	49.00	49.50	1.50
48.00	50.50	51.00	1.50
52.00	54.50	55.00	1.50
54.00	56.50	57.00	1.50
56.00	58.50	59.00	1.50

Silicone/Fiberglass Material

Inside Diameter (I.D.)	Maximum Outer Diameter (O.D.)	Maximum Bellows Depth
1.50	2.00	0.25
1.63	2.13	0.25
1.75	2.25	0.25
1.88	2.38	0.25
2.00	2.75	0.38
2.25	3.00	0.38
2.38	3.13	0.38
2.50	3.25	0.38
2.75	3.50	0.38
3.00	3.75	0.38
3.25	4.00	0.38
3.50	4.50	0.50
3.75	4.75	0.50
4.00	5.00	0.50
4.25	5.25	0.50
4.50	5.50	0.50
4.75	5.75	0.50
5.00	6.25	0.63
5.38	6.63	0.63
5.50	6.75	0.63
6.00	7.50	0.75
6.25	7.75	0.75
6.50	8.00	0.75
6.63	8.13	0.75
6.75	8.25	0.75
7.00	8.50	0.75
7.25	8.75	0.75
7.63	9.13	0.75
8.00	10.00	1.00
8.50	10.50	1.00
8.63	10.63	1.00
9.00	11.00	1.00
9.25	11.25	1.00
9.50	11.50	1.00
9.75	11.75	1.00
10.00	12.00	1.00
10.25	12.25	1.00
10.50	12.50	1.00
10.75	12.75	1.00
11.00	13.00	1.00
11.75	13.75	1.00
12.00	14.00	1.00
12.75	14.75	1.00
13.00	15.00	1.00
13.50	15.50	1.00
14.00	16.00	1.00
15.00	17.00	1.00
16.00	18.00	1.00
16.50	18.50	1.00
17.00	19.00	1.00
17.25	19.25	1.00
17.81	19.81	1.00
18.00	20.00	1.00
19.00	21.00	1.00
20.00	22.00	1.00
21.00	23.00	1.00
21.38	23.38	1.00
22.00	24.00	1.00
22.75	24.75	1.00
24.00	26.00	1.00
25.00	27.00	1.00
26.00	28.00	1.00
28.50	30.50	1.00
30.00	32.00	1.00
31.50	33.50	1.00
33.00	35.00	1.00
34.00	36.00	1.00
36.00	38.00	1.00
38.50	40.50	1.00
40.00	42.00	1.00
41.00	43.00	1.00
42.50	44.50	1.00
44.00	46.00	1.00
46.50	48.50	1.00
48.00	50.00	1.00
52.00	54.00	1.00
54.00	56.00	1.00
56.00	58.00	1.00

Stock Bellows

Gortiflex convoluted tubing can be used as covers for screws, rods, ball splines. They can also be applied as flexible connections where vibration, movement or misalignment is involved.

CT Style

For light- to medium-duty environments (oil, dirt, chips and other abrasives)
Chemical and UV resistance
Operating temperature range: -30° F to 260° F*
Available in 13 stock sizes, from 1 to 10 inch I.D. and 24″ extended lengths
CT units are made from 0.030″ thick (+/- 0.010″) elastomer reinforced with outer nylon stocking
Ends consist of a 1″ long collar on each end for mounting with optional clamps (collars can be removed to provide flanges)
Easy mounting with clamps, stocked in all sizes (clamp band width is ½ inch)

Style No.	Bellows I.D.	Bellows O.D.	Ext. Length	Ret. Length
CT-1	1″	1-3/4″	24″	5-1/4″
CT-1.5	1-1/2″	2-3/8″	24″	4-1/2″
CT-2	2	3″	24″	4″
CT-2.5	2-1/2″	3-1/2″	24″	4″
CT-3	3″	4-1/4″	24″	3-1/4″
CT-3.5	3-1/2″	5″	24″	3″
CT-4	4″	5-1/2″	24″	3″
CT-4.5	4-1/2″	6″	24″	3″
CT-5	5″	6-3/4″	24″	2-1/2″
CT-6	6″	8″	24″	2-1/4″
CT-7	7″	9″	24″	2-1/4″
CT-8	8″	10″	24″	2-1/4″
CT-10	10″	12″	24″	2-1/4″

CTH Style

For light-duty environments (oil and dust)
Chemical and UV resistance
Operating temperature range: -30° F to 260° F*
Available in 6 stock sizes from 0.75 to 2 inch I.D. and extended lengths of 12″ or 24″
CTH units are made from 0.030″ thick Goralon elastomer
Inside flanges on both ends of the bellows accept a snap-in collar to achieve the desired connecting I.D. Snap-in collars are black polyurethane, ¾ inch long, available in a variety of sizes
Easy mounting with clamps, stocked in all sizes (clamp band width is ½ inch)

Bellows I.D. 3/4” – O.D. 1-5/8”

Style No.	Bellows I.D.	Bellows O.D.	Ext. Length	Ret. Length	Snap-In Collar Sizes (I.D.)
CTH-.75-12	3/4″	1-5/8″	12″	1-7/8″	1/4″, 1/2″, 3/4″, 1″
CTH-.75-24	3/4″	1-5/8″	24″	3-3/4″	1/4″, 1/2″, 3/4″, 1″

Bellows I.D. 1-3/8” – O.D. 2-1/2”

Style No.	Bellows I.D.	Bellows O.D.	Ext. Length	Ret. Length	Snap-In Collar Sizes (I.D.)
CTH-1.375-12	1-3/8″	2-1/2″	12″	1-3/8″	1/2″, 3/4″, 1″, 1-1/4″, 1-1/2″, 1-3/4″
CTH-1.375-24	1-3/8″	2-1/2″	24″	2-3/4″	1/2″, 3/4″, 1″, 1″-1/4″, 1-1/2″, 1-3/4″

Bellows I.D. 2” – O.D. 3-1/4”

Style No.	Bellows I.D.	Bellows O.D.	Ext. Length	Ret. Length	Snap-In Collar Sizes (I.D.)
CTH-2-12	2″	3-1/4″	12″	1″	1″, 1-1/4″, 1-1/2″, 1-3/4″, 2″, 2-1/4″
CTH-2-24	2″	3-1/4″	24″	2″	1″, 1-1/4″, 1-1/2″, 1-3/4″, 2″, 2-1/4″

Die Set Shields

Gortiflex® Die Set Bellows are packaged conveniently for easy ordering. Die set bellows protect ball bushings or standard die sets to lengthen life and increase operator safety. There are 7 sizes to cover pins from 3/4″ to 2 1/2″ diameter. Manufactured from heavy-duty, oil-resistant Goralon® material. Each set consists of 2 bellows, 2 clamps, and 2 back up plates.

Features & Benefits

Durable construction provides long-life operation, even in high-speed die set applications
Completely seals out damaging dirt, dust, scrap, and scale
Lengthens die set life
Provides increased operator safety
Delivered with back up mounting plate and clamp for a complete solution

Styles

Sizes	Bushings	Ball Bearings
Pin Diameter	Shoulder	Sleeve	Shoulder	Sleeve
3/4″, 7/8″	DSA	DSA	–	DSA
1″, 1-1/8″	DSB	DSA	DSC	DSB
1-1/4″	DSC	DSB	DSD	DSD
1-1/2″	DSD	DSC	DSE	DSE
1-3/4″	DSE	DSD	DSF	DSE
2″	DSF	DSE	DSG	DSF
2-1/2″	DSG	DSF	–	DSG

Bellows Dimensions

Style	Bellows I.D.	Bellows O.D.	Max Length	Min Length	Collar I.D. Range
DSA	1-1/2″	2-1/2″	11″	1-1/2″	1-3/8″ to 1-5/8″
DSA-18	1-1/2″	2-1/2″	18″	3″	1-3/8″ to 1-5/8″
DSB	1-3/4″	2-3/4″	11″	1-1/2″	1-5/8″ to 1-7/8″
DSB-18	1-3/4″	2-3/4″	18″	3″	1-5/8″ to 1-7/8″
DSC	2″	3″	11″	1-1/2″	1-7/8″ to 2″
DSC-18	2″	3″	18″	3″	1-7/8″ to 2″
DSD	2-1/4″	3-1/4″	11″	1-1/2″	2-1/8″ to 2-3/8″
DSD-18	2-1/4″	3-1/4″	18″	3″	2-1/8″ to 2-3/8″
DSE	2-3/4″	3-3/4″	11″	1-1/2″	2-1/2″to 2-3/4″
DSE-18	2-3/4″	3-3/4″	18″	3″	2-1/2″ to 2-3/4″
DSF	3″	4″	11″	1-1/2″	2-7/8″ to 3-1/8″
DSF-18	3″	4″	18″	3″	2-7/8″ to 3-1/8″
DSG	3-1/2″	4-1/2″	11″	1-1/2″	3-3/8″ to 3-5/8″
DSG-18	3-1/2″	4-1/2″	18″	3″	3-3/8″ to 3-5/8″

Gortiflex Bellows OD and ID

Additional Options

Gortiflex bellows can be customized to include zippers, tie strips, or internal guides. Below is more information on the additional options.

Zipper Choices

Tie Strip Choices

Internal Guide Choices

An internal guide is a structural component installed inside a bellows to prevent the bellows from resting on the covered part. It consists of an inner hub, which interfaces with the moving component being protected (such as a screw, shaft, or spline), and a guide plate, which supports and guides the inside diameter of the bellows.

Internal guides are inserted inside the bellows and ride along the covered component to maintain alignment during extension and compression. As the bellows expands and compresses, the internal guide helps control motion, prevent snaking or twisting, and ensure consistent tracking over long travel lengths.

Internal guides are necessary when the bellows is protecting a moving mechanical component such as a ball screw, acme screw, spline, or rotating shaft. Guide selection depends on orientation, travel length, speed, and the component being protected.

Types of Guides

Plastic (HDPE) (guide plate & hub)
Aluminum (guide plate & hub)
Nylon (hub) & Aluminum (guide plate)
Pin Type (Acetal pin/hub & PVC guide plate)

Note: Each guide requires a minimum overall clearance of 0.75” – 1” depending on the type used.

Application/Component	Recommended Guide Type
High-speed applications	Nylon guides
High temperature applications	Aluminum
Ball screws	Aluminum, plastic, nylon or pin-type guides
Share edged acme screws	Nylon or plastic guides
Acme screws	Nylon guides
Splines & keyed shafts	Nylon guides

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Gortiflex® Bellows

Custom Gortiflex Bellows

Features & Benefits

Typical Applications

Profiles/Shapes

Materials

Accessories & Mounting Options