Macro Sensors LVDT Accessories: Core Connecting Rod

Information and specifications for manufacturing core rods

Core Rod Series Table

Standard Thread

Metric Thread

LVDT Series Table - Standard click here for metric
LVDT Series	D: Rod Diameter (nom)	T: Thread	TT: Tapping*	SS: Set Screw	N: Null
CD 375	0.110	4-40 UNC	1-72 UNF	1-72 X 3/8	1/2 H
DC 750	0.188	10-32 UNF	4-40 UNC	4-40 X 1/2	DATA
E 750	0.188	10-32 UNF	4-40 UNC	4-40 X 1/2	1/2 H
HLR 750	0.188	10-32 UNF	4-40 UNC	4-40 X 1/2	DATA
HSA 750	0.188	10-32 UNF	4-40 UNC	4-40 X 1/2	DATA
HSTA 750	0.188	10-32 UNF	4-40 UNC	4-40 X 1/2	DATA
HSAR 750	0.188	10-32 UNF	4-40 UNC	4-40 X 1/2	DATA
HSTAR 750	0.188	10-32 UNF	4-40 UNC	4-40 X 1/2	DATA
HSD 750	0.188	10-32 UNF	4-40 UNC	4-40 X 1/2	DATA
HSI 750	0.188	10-32 UNF	4-40 UNC	4-40 X 1/2	DATA
HSDR 750	0.188	10-32 UNF	4-40 UNC	4-40 X 1/2	DATA
HSI 750	0.188	10-32 UNF	4-40 UNC	4-40 X 1/2	Call Factory
PR 750	0.250	1/4-28 UNF	6-40 UNF	6-40 X 1/2	DATA
PR 812	0.250	1/4-28 UNF	6-40 UNF	6-40 X 1/2	DATA
PRDC 812	0.250	1/4-28 UNF	6-40 UNF	6-40 X 1/2	Call Factory
PRH 812	0.250	1/4-28 UNF	6-40 UNF	6-40 X 1/2	1/2 H
PRS 812	0.250	1/4-28 UNF	6-40 UNF	6-40 X 1/2	1/2 H
PTI 750	0.188	10-32 UNF	4-40 UNC	4-40 X 1/2	DATA
SQ 500	0.110	4-40 UNC	1-72 UNF	1-72 X 3/8	1/2 H
SQ 1250	0.250	1/4-28 UNF	6-40 UNF	6-40 X 1/2	DATA

* For class 2 threads, 1-72 tap drill: #53; 4-40 tap drill: #44; 6-40 tap drill: #34

LVDT Series Table - Metric click here for standard
LVDT Series	D: Rod Diameter (nom)	T: Thread	TT: Tapping*	SS: Set Screw	N: Null
CD 375	2.80mm	M3 X 0.5-6g	M2 X 0.4-6h	M2 X 10mm	1/2 H
DC 750	4.77mm	M5 X 0.8-6g	M3 X 0.5-6h	M3 X 13mm	DATA
E 750	4.77mm	M5 X 0.8-6g	M3 X 0.5-6h	M3 X 13mm	1/2 H
HLR 750	4.77mm	M5 X 0.8-6g	M3 X 0.5-6h	M3 X 13mm	DATA
HSA 750	4.77mm	M5 X 0.8-6g	M3 X 0.5-6h	M3 X 13mm	DATA
HSTA 750	4.77mm	M5 X 0.8-6g	M3 X 0.5-6h	M3 X 13mm	DATA
HSAR 750	4.77mm	M5 X 0.8-6g	M3 X 0.5-6h	M3 X 13mm	DATA
HSTAR 750	4.77mm	M5 X 0.8-6g	M3 X 0.5-6h	M3 X 13mm	DATA
HSD 750	4.77mm	M5 X 0.8-6g	M3 X 0.5-6h	M3 X 13mm	DATA
HSI 750	4.77mm	M5 X 0.8-6g	M3 X 0.5-6h	M3 X 13mm	DATA
HSDR 750	4.77mm	M5 X 0.8-6g	M3 X 0.5-6h	M3 X 13mm	DATA
HSI 750	4.77mm	M5 X 0.8-6g	M3 X 0.5-6h	M3 X 13mm	Call Factory
PR 750	6.35mm	M6 X 1.0-6g	M4 X 0.7-6h	M4 X 13mm	DATA
PR 812	6.35mm	M6 X 1.0-6g	M4 X 0.7-6h	M4 X 13mm	DATA
PRDC 812	6.35mm	M6 X 1.0-6g	M4 X 0.7-6h	M4 X 13mm	Call Factory
PRH 812	6.35mm	M6 X 1.0-6g	M4 X 0.7-6h	M4 X 13mm	1/2 H
PRS 812	6.35mm	M6 X 1.0-6g	M4 X 0.7-6h	M4 X 13mm	1/2 H
PTI 750	4.77mm	M5 X 0.8-6g	M3 X 0.5-6h	M3 X 13mm	DATA
SQ 500	2.80mm	M3 X 0.5-6g	M2 X 0.4-6h	M2 X 10mm	1/2 H
SQ 1250	6.35mm	M6 X 1.0-6g	M4 X 0.7-6h	M4 X 13mm	DATA

* For class 2 threads, 1-72 tap drill: #53; 4-40 tap drill: #44; 6-40 tap drill: #34


Recommended LVDT Core Connecting Rod Design Prepared by Harold Schaevitz		Core rod material must be non-magnetic, preferably 300 series (18-8) stainless steel. Thread 18-8 stainless steel socket set screw (SS) into tapped hole “TT” with Loctite; Then thread set screw projecting from core rod assembly into LVDT core. All dimensions in inches; ext. threads are class 2A; int. threads are class 2B connection / adjustment length “LL” is selected to suit the LVDT installation. Minimum unthreaded rod length “L” is derived from the formula below: L=N+R-C/2 Where: N is null point of the LVDT from its data sheet or table below R is the range of the LVDT depicted in its model number D is the length of the LVDT core from its data sheet H is the length of the LVDT case from its data sheet. Diameter “D”, Threads “T” and “TT”, and Null Point “N” are from the table below.
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Core Connecting Rod Design

Lengths "L" and "LL" are from the Core Rod Series table above.
Diameter “D”, Threads “T” and “TT”, and Null Point “N” are from the LVDT Series table above.