Rubber and Resin Couplings

三木プーリのゴム・樹脂カップリング製品シリーズ一覧集合写真（防振・衝撃吸収・軸継手）

These couplings utilize the elasticity of rubber and resin to offer a wide range of applications, and we offer a comprehensive lineup compatible with diesel engines, induction motors, and even servo motors. The elasticity of rubber and resin not only compensates for misalignment but also absorbs vibrations and shocks from the drive source, helping to protect mechanical equipment.

List of Rubber and Resin Couplings

三木プーリのサーボフレックスラバー SFR-SA1タイプゴム・樹脂カップリング製品画像（防振・衝撃吸収・サーボモータ用軸継手）

Servoflex Rubber

This high-damping rubber coupling for servo and stepper motors suppresses the risk of resonance.

SFR Model

SA1 Type

三木プーリのスターフレックスALSモデル ALS-Rタイプゴム・樹脂カップリング製品画像（キー締結・ジョーカップリング・軸ずれ吸収・防振軸継手）

Star Flex (J-Coupling)

This model is designed for high performance by incorporating polyurethane elastomer elements and curved jaws.

ALS Model

ALS [R] Type

ALS [Y] Type

ALS [Type B]

EL Model (Element Only)

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三木プーリのスパフレックスALモデル ALタイプゴム・樹脂カップリング製品画像（ジョーカップリング・防振・衝撃吸収軸継手）

Spaflex (Joint Coupling)

This coupling features a simple design consisting of nothing more than a rubber buffer (nitrile rubber) sandwiched between two hubs.

AL Model

L Model (Spider only)

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三木プーリのベローフレックス CHPタイプゴム・樹脂カップリング製品画像（防振・衝撃吸収・柔軟軸継手・伝動部品）

Belloflex (Resin Bellows Coupling)

This model features highly elastic resin boots that absorb vibrations and minimize axial reaction forces caused by installation tolerances.

CHP Model

三木プーリのセンタフレックスCF-Aモデル CF-A-O2タイプゴム・樹脂カップリング製品画像（衝撃吸収・防振軸継手・伝動機器）

Centaflex CF-A Model

Power transmission via highly elastic rubber. It excels at absorbing vibrations and shocks, and its pre-compression design ensures high durability.

CF-A Model

[O2] Type

[O1] Type

[OC] Type

[OB] Type

[OP] Type

[O0] Type

[S2] Type

[S1] Type

[SC] Type

[SB] Type

[SP] Type

[S0] Type

[OG] Type

[OZ] Type

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三木プーリのセンタフレックスCF-Hモデル CF-H-O2タイプゴム・樹脂カップリング製品画像（防振・高トルク対応・柔軟軸継手）

Centaflex CF-H Model

Power transmission using polyester resin with rubber-like elasticity. It offers environmental resistance that cannot be achieved with rubber.

CF-H Model

[O2] Type

[O1] Type

[OC] Type

[OB] Type

[OP] Type

[O0] Type

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三木プーリのセンタフレックスCF-Xモデル CF-X-O2タイプゴム・樹脂カップリング製品画像（防振・高トルク対応・柔軟軸継手）

Centaflex CF-X Model

Power transmission using nylon resin. Depending on the element's structure and material, this model features zero backlash.

CF-X Model

[O2] Type

[O1] Type

CF-X [OB] Type

CF-X [O0] Type

[O2-C] Type

[OG] Type

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三木プーリのセンタフレックスCF-Bモデル CF-Bタイプゴム・樹脂カップリング製品画像（ポリウレタン樹脂エレメント・防振軸継手）

Centaflex CF-B Model

It uses polyurethane and polyester as its core materials, making it easy to maintain due to its design.

CF-B Model

Polyurethane resin type

[H] Polyester Resin Type

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三木プーリのセンタフレックスCMモデル CMタイプゴム・樹脂カップリング製品画像（防振・衝撃吸収・柔軟軸継手）

Centamax CM Model

Power transmission via highly elastic rubber. This engine coupling excels at absorbing vibrations and shocks.

Commercial model

Q

[StarFlex] What is its lifespan?

A

When used mainly for power transmission, a service life of over 10 years can be expected if properly selected according to the catalog. Service life varies with operating conditions and mounting misalignment. Please contact us for details.

Q

[StarFlex] Is it possible to use it beyond the rated torque?

A

As long as the maximum torque is not exceeded, up to 10 starts per day is acceptable for an 8-hour operating cycle. This assumption is based on the starting torque of a motor with a low frequency of starts and stops.

Q

[Star Flex] What is the Loose Fit Element?

A

The torque transmission surface of the element is designed with a convex profile (crowning), which allows for greater tolerance in installation. Additionally, the fit with the hub is intentionally loose, making assembly easier and reducing labor hours.

Q

[StarFlex] Does the no-backlash mechanism degrade over time?

A

Starflex achieves zero backlash by pre-compressing the element, but resin aging and deformation may reduce zero-backlash performance over time. For long-term use, a higher service factor is recommended. For higher precision, use the Servoflex Series.

Q

[CentaFlex] Resonance occurs in a device powered by a diesel engine. Is there a solution?

A

When

Q

What is the "pre-compression structure" of the [CentaFlex] CF-A model?

A

Rubber lasts longer under compression than tension, and pre-compression—applying load after partial compression—further improves durability. The CF-A model is assembled with pre-compression applied to the rubber element for long service life.

Q

[Centaflex] The Effects of Heat on Rubber Couplings and Maintenance

A

Heat

Q

[CentaFlex] About CentaLock

A

The hub can be mounted using a center-lock mechanism. Tightening the clamping screws deforms the hub spline section and presses it against the shaft splines for secure fixation. Each screw generates approx. 1 ton of axial holding force.