Motor6D
CreatorHub

Creates an animatable joint between two BaseParts. Superseded by AnimationConstraint for avatar/character rigs. Motor6D is no longer used by default for player characters when AvatarJointUpgrade is enabled.

Memory category	BaseParts

Member index 4

History		Member
486		ChildName: string
728		EnableSkinning: bool
486		ParentName: string
726		Transform: CFrame
4 members inherited from Motor
726		CurrentAngle: float
726		DesiredAngle: float
726		MaxVelocity: float
573		SetDesiredAngle(value: float): null
7 members inherited from JointInstance
726		Active: bool
726		C0: CFrame
726		C1: CFrame
726		Enabled: bool
726		Part0: BasePart
726		Part1: BasePart
726		part1: BasePart
60 members inherited from Instance
726		Archivable: bool
726		Capabilities: SecurityCapabilities
726		DataCost: int
726		IsInSandbox: bool
726		Name: string
726		Parent: Instance
726		PredictionMode: PredictionMode
726		RobloxLocked: bool
726		Sandboxed: bool
726		SourceAssetId: int64
726		UniqueId: UniqueId
726		archivable: bool
576		AddTag(tag: string): null
573		ClearAllChildren(): null
462		Clone(): Instance
573		Destroy(): null
486		FindFirstAncestor(name: string): Instance
486		FindFirstAncestorOfClass(className: string): Instance
486		FindFirstAncestorWhichIsA(className: string): Instance
486		FindFirstChild(name: string, recursive: bool = false): Instance
486		FindFirstChildOfClass(className: string): Instance
486		FindFirstChildWhichIsA(className: string, recursive: bool = false): Instance
486		FindFirstDescendant(name: string): Instance
563		GetActor(): Actor
486		GetAttribute(attribute: string): Variant
462		GetAttributeChangedSignal(attribute: string): RBXScriptSignal
631		GetAttributes(): Dictionary
648		GetChildren(): Instances
462		GetDebugId(scopeLength: int = 4): string
707		GetDescendants(): Instances
486		GetFullName(): string
706		GetStyled(name: string, selector: string?): Variant
657		GetStyledPropertyChangedSignal(property: string): RBXScriptSignal
576		GetTags(): Array
576		HasTag(tag: string): bool
486		IsAncestorOf(descendant: Instance): bool
486		IsDescendantOf(ancestor: Instance): bool
664		IsPropertyModified(property: string): bool
698		QueryDescendants(selector: string): Instances
573		Remove(): null
576		RemoveTag(tag: string): null
664		ResetPropertyToDefault(property: string): null
573		SetAttribute(attribute: string, value: Variant): null
462		WaitForChild(childName: string, timeOut: double): Instance
726		children(): Instances
726		clone(): Instance
726		destroy(): null
726		findFirstChild(name: string, recursive: bool = false): Instance
726		getChildren(): Instances
726		isDescendantOf(ancestor: Instance): bool
726		remove(): null
462		AncestryChanged(child: Instance, parent: Instance)
462		AttributeChanged(attribute: string)
462		ChildAdded(child: Instance)
462		ChildRemoved(child: Instance)
462		DescendantAdded(descendant: Instance)
462		DescendantRemoving(descendant: Instance)
500		Destroying()
657		StyledPropertiesChanged()
726		childAdded(child: Instance)
6 members inherited from Object
726		ClassName: string
726		className: string
647		GetPropertyChangedSignal(property: string): RBXScriptSignal
647		IsA(className: string): bool
726		isA(className: string): bool
647		Changed(property: string)

Removed member index 2

History		Member
726		ReplicateCurrentAngle6D: Vector3
726		ReplicateCurrentOffset6D: Vector3

Description

Motor6D joins two BaseParts (Part0 and Part1) together in an animatable way. The Transform property determines the offset between these parts. This can be set manually using RunService.PreSimulation or through an Animator.

Models whose parts are joined by Motor6D are usually referred to as rigs, typically for Humanoids. Motor6D remains appropriate for non-avatar mechanical rigs (doors, turrets, vehicles) where physical simulation is not needed.

Transitioning to AnimationConstraint for Avatar rigs

As of the Avatar Joint Upgrade, R15 player characters spawn with AnimationConstraints instead of Motor6Ds when AvatarJointUpgrade is enabled (the default for new experiences). Code that assumes character joints are Motor6Ds — such as character:FindFirstChildOfClass("Motor6D") or joint:IsA("Motor6D") — will not find joints on upgraded characters. Use AnimationConstraint for new avatar rig code. See the migration notes on the AnimationConstraint page.

History 21
Hide member changes

728 Add EnableSkinning
726 Change Default of Transform from CFrame(0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1) to
726 Remove ReplicateCurrentOffset6D
726 Remove ReplicateCurrentAngle6D
705 Change Default of Transform from to CFrame(0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1)
705 Change Default of Transform from CFrame(0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1) to
702 Change Default of Transform from to CFrame(0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1)
693 Change MemoryCategory of Motor6D from PhysicsParts to BaseParts
636 Add ReplicateCurrentOffset6D
636 Add ReplicateCurrentAngle6D
553 Change Default of Transform from to
486 Change ThreadSafety of Transform from ReadOnly to ReadSafe
486 Change ThreadSafety of ParentName from ReadOnly to ReadSafe
486 Change ThreadSafety of ChildName from ReadOnly to ReadSafe
462 Change ThreadSafety of Transform from to ReadOnly
462 Change ThreadSafety of ParentName from to ReadOnly
462 Change ThreadSafety of ChildName from to ReadOnly
427 Add ParentName
427 Add ChildName
300 Add Transform
47 Add Motor6D

Members 4

ChildName
CreatorHub

Type		Default
string

It cannot be accessed by script code.

Its interface does not cross the network boundary.

Its value can be read, but it cannot be modified.

Thread safety	ReadSafe
Category	Animatable
Loaded/Saved	false

History 3

486 Change ThreadSafety of ChildName from ReadOnly to ReadSafe
462 Change ThreadSafety of ChildName from to ReadOnly
427 Add ChildName

Tags: [ReadOnly, NotReplicated, NotScriptable]

EnableSkinning
CreatorHub

Type		Default
bool

Security	RobloxScriptSecurity
Thread safety	ReadSafe
Category	Behavior
Loaded/Saved	false

History 1

728 Add EnableSkinning

ParentName
CreatorHub

Type		Default
string

It cannot be accessed by script code.

Its interface does not cross the network boundary.

Its value can be read, but it cannot be modified.

Thread safety	ReadSafe
Category	Animatable
Loaded/Saved	false

History 3

486 Change ThreadSafety of ParentName from ReadOnly to ReadSafe
462 Change ThreadSafety of ParentName from to ReadOnly
427 Add ParentName

Tags: [ReadOnly, NotReplicated, NotScriptable]

Transform
CreatorHub

Type		Default
CFrame

The internal CFrame that is manipulated when a Motor6D is being animated. It is recommended to use this property for custom animations rather than JointInstance.C0 and JointInstance.C1.

Timing

Motor6D transforms are not applied immediately, unlike updating C0 and C1, but rather as a batch in a parallel job after RunService.PreSimulation, immediately before physics steps. The deferred batch update is much more efficient than many immediate updates.

If the Motor6D is part of an animated model with an Animator, then Motor6D.Transform will usually be overwritten every frame by the Animator after RunService.PreAnimation and before RunService.PreSimulation.

Its interface does not cross the network boundary.

It is not meant to be used, and may have unresolved issues.

Thread safety	ReadSafe
Category	Data
Loaded/Saved	false

History 8

726 Change Default of Transform from CFrame(0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1) to
705 Change Default of Transform from to CFrame(0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1)
705 Change Default of Transform from CFrame(0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1) to
702 Change Default of Transform from to CFrame(0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1)
553 Change Default of Transform from to
486 Change ThreadSafety of Transform from ReadOnly to ReadSafe
462 Change ThreadSafety of Transform from to ReadOnly
300 Add Transform

Tags: [Hidden, NotReplicated]

Removed members 2

ReplicateCurrentAngle6D
CreatorHub

Type		Default
Vector3		0, 0, 0

It cannot be accessed by script code.

It is not meant to be used, and may have unresolved issues.

Security	RobloxSecurity
Thread safety	ReadSafe
Category	Replication
Loaded/Saved	false

History 2

726 Remove ReplicateCurrentAngle6D
636 Add ReplicateCurrentAngle6D

Tags: [Hidden, NotScriptable]

ReplicateCurrentOffset6D
CreatorHub

Type		Default
Vector3		0, 0, 0

It cannot be accessed by script code.

It is not meant to be used, and may have unresolved issues.

Security	RobloxSecurity
Thread safety	ReadSafe
Category	Replication
Loaded/Saved	false

History 2

726 Remove ReplicateCurrentOffset6D
636 Add ReplicateCurrentOffset6D

Tags: [Hidden, NotScriptable]

Reference API Roblox

Engine API

Website

Related

Reference API Roblox

Motor6D
CreatorHub

Member index 4

Removed member index 2

Description

Description

Transitioning to AnimationConstraint for Avatar rigs

History 21
Hide member changes

Members 4

ChildName
CreatorHub

History 3

EnableSkinning
CreatorHub

History 1

ParentName
CreatorHub

History 3

Transform
CreatorHub

Timing

History 8

Removed members 2

ReplicateCurrentAngle6D
CreatorHub

History 2

ReplicateCurrentOffset6D
CreatorHub

History 2

Settings