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Knob Plunger Standard Type Coarse Thread

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Part Number

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Drawing/Specifications
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Part Numbers

Product Overview

♢ Knob plunger is also known as indexing pin or indexing plunger. The pin can be pulled out or inserted by the operation knob for easy and fast positioning and for fixing mechanical elements of the workpiece.
Suitable for fixture indexing, positioning, stop limit and other occasions.

Product Feature

♢ This series is standard knob plungers with coarse threads and the cone head available for the pin front. Depending on the installation, the plunger with lock nut can be selected.
♢ The operation method is generally divided into two types: reset and self-locking type.

Dimensional Drawing

Specifications Overview

Thread	Type		Knob	Body		Pin	Spring	(Lock nut)
	Reset type	Self-locking type	Material	Material	Surface Treatment	Material	Material	Material	Surface Treatment
Coarse	C-PMXA	C-PMXYA	A6061 (Black Anodized)	1215	Blue Zinc Plating	SUS304	SUS304	-	-
	C-PMXK	C-PMXYK						35#	Blue Zinc Plating

Usage Method

How to operate the reset type and self-locking type
• Reset type
1. The front end is usually protruding.
2. The front end retracts when the knob is pulled out.
3. If the knob is released, the front end will return to the protruding state through the action of the built-in spring force.

• Self-locking type
1. The front end is usually protruding.
2. The front end retracts when the knob is pulled out.
3. If the front end is rotated by 90° while maintaining the pull-out state, the retraction state of the front end can be locked.
4. To release the locked state, simply rotate 90° while maintaining the pulled-out state.
5. If the knob is released, the front end will return to the protruding state through the action of the built-in spring force.

Example of Use


Used for indexing of the index plate		Used for positioning of movable fixture

Specification Table

Part Number			Thread Pitch (Fine)	D	D₁	B	S	L		L₁	L₂	L₃	L₄	L₅	SW₁	SW₂	Load (N)
Type		M	Thread Pitch (Fine)	D	D₁	B	S	Reset type	Self-locking type	L₁	L₂	L₃	L₄	L₅	SW₁	SW₂	min.	max.
		6M	1	12	6.9	4	4	30.5	33	12	4.5	10	3.2	7	6	10	4.3	9.5
Reset type	Self-locking type	8M	1.25	16	9.2	5	5	40	43.5	16	6	14	4	9.5	8	13	4.3	12
C-PMXA	C-PMXYA	10M	1.5	18	11.5	6	6	49	52	20	7.5	18	5	10.5	10	16	4.3	18
C-PMXK	C-PMXYK	12M	1.75	21	13.8	8	8	59	63.5	24	9	22	6	13.5	12	18	4.3	20.5
kgf=N×0.101972

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
C-PMXA6M
C-PMXA8M
C-PMXA10M
C-PMXA12M
C-PMXK6M
C-PMXK8M
C-PMXK10M
C-PMXK12M
C-PMXYA6M
C-PMXYA8M
C-PMXYA10M
C-PMXYA12M
C-PMXYK6M
C-PMXYK8M
C-PMXYK10M
C-PMXYK12M

Standard Unit Price	Minimum order quantity	Volume Discount	Days to Ship	Screw Dia. M (mm)	Tip Outer Dia. B (Ø)	Stroke (S) (mm)	Locking Mechanism	Length L (mm)	Accessories
MYR 12.52	1 Piece(s)	Available	1 Day(s)	6	4	4	[Returning] Return type	30.5	No Locknut
MYR 15.74	1 Piece(s)	Available	1 Day(s)	8	5	5	[Returning] Return type	40	No Locknut
MYR 27.44	1 Piece(s)	Available	1 Day(s)	10	6	6	[Returning] Return type	49	No Locknut
MYR 29.63	5 Piece(s)	Available	6 Day(s)	12	8	8	[Returning] Return type	59	No Locknut
MYR 12.67	1 Piece(s)	Available	1 Day(s)	6	4	4	[Returning] Return type	30.5	With Locknut
MYR 16.15	1 Piece(s)	Available	1 Day(s)	8	5	5	[Returning] Return type	40	With Locknut
MYR 28.19	1 Piece(s)	Available	1 Day(s)	10	6	6	[Returning] Return type	49	With Locknut
MYR 28.19	1 Piece(s)	Available	1 Day(s)	12	8	8	[Returning] Return type	59	With Locknut
MYR 15.74	1 Piece(s)	Available	1 Day(s)	6	4	4	[Nose Lock] Self-locking Type	33	No Locknut
MYR 21.74	1 Piece(s)	Available	1 Day(s)	8	5	5	[Nose Lock] Self-locking Type	43.5	No Locknut
MYR 29.81	1 Piece(s)	Available	1 Day(s)	10	6	6	[Nose Lock] Self-locking Type	52	No Locknut
MYR 35.63	1 Piece(s)	Available	1 Day(s)	12	8	8	[Nose Lock] Self-locking Type	63.5	No Locknut
MYR 15.89	1 Piece(s)	Available	1 Day(s)	6	4	4	[Nose Lock] Self-locking Type	33	With Locknut
MYR 22.15	1 Piece(s)	Available	1 Day(s)	8	5	5	[Nose Lock] Self-locking Type	43.5	With Locknut
MYR 30.56	1 Piece(s)	Available	1 Day(s)	10	6	6	[Nose Lock] Self-locking Type	52	With Locknut
MYR 34.19	1 Piece(s)	Available	1 Day(s)	12	8	8	[Nose Lock] Self-locking Type	63.5	With Locknut

Basic Information

Type (Details)	Standard Type	Mounting Method (Details)	Screw-In	Body Material	Steel
Overall Length	Standard	Pin Material	Stainless Steel	All Stainless	Not Compliant
Pin Surface Treatment	Not Provided	Knob	Provided	Main Body Surface Treatment	Zinc Plating

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16 Part Numbers

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Specification/Dimensions

Screw Dia. M(mm)
6

8

10

12
Clear
Tip Outer Dia. B(Ø)
4

5

6

8
Clear
Stroke (S)(mm)
4

5

6

8
Clear
Locking Mechanism
- Nose Lock
  - Self-locking Type
- Returning
  - Return type
Clear
Length L(mm)
30.5

33

40

43.5

49

52

59

63.5
Clear
Accessories
- No Locknut
- With Locknut
Clear
type
- C-PMXA
- C-PMXK
- C-PMXYA
- C-PMXYK
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

1 Day(s) or Less

6 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 .

Frequently asked question (FAQ)

Question: Can the knob plunger withstand radial force?: Answer: The knob plunger is not recommended to bear radial cutting force, as it is prone to product damage and fracture, and generally, it can only bear axial force.
Question: What role does a ball plunger play?: Answer: It is a mechanical element part that can easily and quickly locate and fix the workpiece by operating the knob or the handle to pull out or insert the pin.
Early knob plungers were mainly used for parts used in the angular positioning of indexing devices.
In recent years, knob plunger has been more widely used, and become an indispensable mechanical element part of equipment and devices.
Question: What are the characteristics of fine thread type compared to coarse thread type?: Answer: Fine thread type is suitable for fine-tuning the ejection amount of the pin. More precise positioning is more possible compared to coarse thread type.
Question: What is the difference between reset type and self-locking type knob plungers?: Answer: The self-locking type can lock the front end by turning 90° after pulling out the knob while keeping the pulled state and turning 90° to release the lock.