The Complete Guide to Chain

2.4 Plus α Alpha Attachments

Plus α Alpha attachments are the second most frequently used type of modified attachments. These attachments are sorted into three types:

  1. Hole diameter in an A or K attachment or the length of the pin in a D attachment (Figures 2.28 and 2.29).
  2. Installing a nut in the hole of an A or K attachment (Figure 2.30).
  3. Using a different type of attachment (Figures 2.31 (i) and (ii).

Types (1) and (2) are easy-to-order products. Type (3) includes special designs that are available for the convenience of equipment designers. These designs can be used whenever possible for equipment.

Plus α Alpha attachments are available in the following types of chains:

  1. Special surface treatment (nickel-plated, WP®).
  2. Made of 304 stainless steel or other metals.
  3. Lube-free (LAMBDA® series or other type).

Figure 2.28 Changing the Hole Diameter in A or K Attachments
Figure 2.28 Changing the Hole Diameter in A or K Attachments

Figure 2.29 Changing the Pin Length in D Attachments
Figure 2.29 Changing the Pin Length in D Attachments

Figure 2.30 Installing a Nut in an A or K Attachment
Figure 2.30 Installing a Nut in an A or K Attachment

Attachment Series (1)
Type Ground attachment

Ground attachment

Large Chain attachment (over RS180).

Large Chain attachment

Double pitch with deep link.

Double pitch with deep link

Symbol PG RS RFD
Spec The upper surface of the link plate has been ground to provide a smooth conveying surface. Attachment for larger sizes over RS180. Side plate is higher than the top of the roller.
Attachment Series (1) cont.
Type Internally bent attachment.

Internally bent attachment

Hollow pin with attachment.

Hollow pin with attachment

Curved attachment with guide plate.

Curved attachment with guide plate

Symbol UM HP GP
Spec Inner bent attachments are chamfered to protect conveyed materials. HP chain with attachment. Curved chain with attachment and guide plate.
Attachment Series (2)
Type Triangle attachment.

Triangle attachment

Sticker attachment.

Sticker attachment

Bushing attachment.

Bushing attachment

Symbol RE FS AB
Spec Conveying bar-type objects. Sharp-top attachment is ideal for conveying board-type objects. Press-fitted bushing is ideal for bearing.
Attachment Series (2) cont
Type Grip attachment.

Grip attachment

No-bend attachment.

No-bend attachment

Rubber attachment.

Rubber attachment

Symbol KU NB RSG
Spec Gripping attachment for thin objects, such as film. The chain bends in one direction only. Rubber pads hold the conveyed material from above and below.
Top Plate, Slat Attachment
Type Rubber pad.

Rubber pad

Heat-treated top plate.

Heat-treated top plate

Bent-end top plate.

Bent-end top plate

Symbol PSG YP SM
Spec Rubber pads prevent damage to the conveyed materials. Improved wear resistance. Easy lateral transfer of conveyed objects.
Top Plate, Slat Attachment cont.
Type Inclined top plate.

Inclined top plate

Crescent plate.

Crescent plate

Slat attachment.

Slat attachment

Symbol CT CL SLT
Spec Smaller gap between the plates. For bottling and canning industries. Excellent for conveying relatively heavy goods.

Figure 2.31 (i) Other Types of Attachments

Guide Roller Attachment
Type Guide roller.

Guide roller

HP with guide roller.

HP with guide roller

Curved chain with guide roller.

Curved chain with guide roller

Spec Guide roller prevents meandering.
Guide Roller Attachment cont.
Type Threaded extended pin.

Threaded extended pin

Extended pin with clip.

Extended pin with clip



Symbol EN EC ST
Spec Thread for tool attachment with nuts. Install tool attachment with clips. Suitable for conveying on the pins.
Free Flow Chain
Type Double strand top roller

Double strand top roller

Top roller with guide attachment.

Top roller with guide attachment

OBR with attachment guide.

OBR with attachment guide

Symbol TR TG SG
Spec Wide-top roller width. For long conveyor line. For long conveyor line.

Figure 2.31 (ii) Other Types of Attachments