Short Series Betaplug Installation

Installation Procedure

The installation of Lee Betaplugs, whether performed manually or automatically, is very easy and economical. First, the preassembled Betaplug is inserted into the tapered installation hole narrow end first. The pin is then driven into the plug using the recommended Lee Company Installation/Staking Tool until the pin is below flush while staking over the back edge of the plug.

The Short Betaplug pin should be installed from 0.50 to 0.80mm (0.020" to 0.031") below flush.

Installation Hole Procedure

The Short Betaplug has been qualified to work in generously toleranced installation holes. The taper of the hole can range anywhere from 4°-5°, giving the designer flexibility in satisfying specific application requirements. Tapered Reamers are available for each size Short Betaplug. See the tooling table for applicable part numbers.

The Lee Company recommends that the Short Betaplug be installed flush or below the surface of the housing to ensure optimum performance. The use of coatings or surface treatments in the area of the installation hole where the Short Betaplug is to be installed is not recommended.

GAGE DIMENSIONS AND MAXIMUM PASSAGE DIAMETERS (mm)

BETAPLUG SIZE	TOP GAGE DIA., D1	BOTTOM GAGE DIA., D2	MAX. PASSAGE DIA., D3	MIN. OPENING, D4	MIN. WALL THICKNESS, D5	GAGE LENGTH, L1	MIN.TAPER DEPTH, L3*
7	7.01	6.69	6.50	7.16	2.45	3.66-4.58	10.00
9	9.01	8.69	8.38	9.16	3.15	3.66-4.58	12.00
11	11.03	10.71	10.39	11.18	3.85	3.66-4.58	12.00
13	13.03	12.71	12.40	13.18	4.55	3.66-4.58	12.00
16	16.08	15.76	15.39	16.23	5.60	3.66-4.58	12.00

* Depth of tapered hole (L3) from depth of minimum diameter (D4).
All dimensions are in millimeters.

Installation / Staking Tools

Lee Installation/Staking Tools are available for each Betaplug and part numbers are listed in the tooling table.

The tool contains a centering feature which ensures proper tool alignment during installation. All Betaplug pins are coated with a wax that produces a thin, solid lubricating film that reduces friction, allowing the pin to be driven to its correct position relative to the plug. Do not clean prior to installation.

Installation Forces

The installation force required to drive the pin into the Betaplug is a function of boss material, installation hole and boss geometry, and plug size. A boss made of a stronger material or having a larger wall thickness will require a greater installation force than one made of a weaker material or having thinner walls. Typical installation forces for A380 die-cast aluminum are listed for each Betaplug. See the tooling table below.

Tooling

BETAPLUG SIZE	INSTALLATION/STAKING TOOL PART NUMBER	TAPERED REAMER PART NUMBER	TAPERED REAMER, ROUGH FINISH PART NUMBER	TYPICAL INSTALLATION FORCE (kN)
7	PLBT0070901S	PLBT0700012S	PLBT0700014S	4.9 (1,100 lbf)
9	PLBT0090901S	PLBT0900012S	PLBT0900014S	4.9 (1,100 lbf)
11	PLBT0110901S	PLBT1100012S	PLBT1100014S	4.9 (1,100 lbf)
13	PLBT0130901S	PLBT1300012S	PLBT1300014S	6.2 (1,400 lbf)
16	PLBT0160901S	PLBT1600012S	PLBT1600014S	6.2 (1,400 lbf)