R&L Releasing Tap Holder




Patented



The patented unique releasing mechanism of the Somma R & L Tap Holder is unequalled for dependability and accuracy which resulted in its selection for usage as original equipment by many machine tool manufacturers.

Features
  • For right or left hand threading
  • Eases tap into work for better matching of threads
  • No spring plungers to wear or break
  • No. 000 size is extremely sensitive for small taps when used on high speed machines
  • Simple operation (see diagrams below)


FIG 1: Ready to start threading operation, clutch slightly engaged (A) and (C).

FIG 2: When tap contacts work, clutch ring (A) slides forward to fully engage spindle (C) for positive driving power.

FIG 3: When end of pullout is reached clutch ring (A) springs back instantly, leaving ample clearance between contact points of clutch ring and spindle, preventing re-engagement or hammering of clutch points in case turret advances slightly after release.

NOTE: TH2-NBG, TH3-NBG AND TH4-NBG have special shank diameter and length for use on New Britain Gridley automatics.

SEE TAP HOLDER BUSHINGS FOR THESE TAP HOLDERS

TAP CAPACITY

PULLOUT FOR RELEASING

HAND
TAP

PIPE
TAP

CAT. NO.

STD.
CLUTCH
NUT

CAT. NO.

SHORT
CLUTCH
NUT

SIZE

A

B

C

D

E

F

G

H

TH000

5/8

1-3/16

7/8

1-1/32

3/8

13/16

1/2

1/2

1/4

1/16

TH000

1/8

TH000-S

.100

TH00

5/8

1-1/4

7/8

1-11/32

13/32

1-1/8

19/32

1/2

7/16

1/8

TH00

1/8

TH00-S

.100

TH1

3/4

1-3/4

1-1/16

1-19/32

1/2

1-5/16

3/4

5/8

11/16

1/4

TH1

5/32

TH1-S

.115

TH2

1"

2"

1-3/8

2-7/32

13/16

1-3/4

1-5/32

1"

1-1/8

3/4

TH2

7/32

TH2-S

.156

TH2-NBG

1"

2"

1-3/8

2-7/32

13/16

1-3/4

1-5/32

1"

1-1/8

3/4

 

 

TH2-NBG

.156

TH3

1-1/4

2-9/16*

2"

2-13/16

7/8

2-1/4

1-1/2

1-1/4

1-1/4

1"

TH3

1/4

TH3-S

.167

TH3-NBG

1-1/2

1-11/16

2"

2-13/16

7/8

2-1/4

1-1/2

1-1/4

1-1/4

1"

 

 

TH3-NBG

.167

TH4

1-1/2

3-3/16

2-9/16

3-5/8

1-1/8

3"

1-5/8

1-1/2

1-1/2

1"

TH4

5/16

TH4-S

.203

TH4-NBG

1-1/2

1-11/16

2-9/16

3-5/8

1-1/8

3"

1-5/8

1-1/2

1-1/2

1"

 

 

TH4-NBG

.203


* PLUS 31/32 DIA. x 15/16 LONG PROJECTION

Releasing Tap Holder Parts

Part
No.

TH000
Cat. No.

TH00
Cat. No.

TH1
Cat. No.

TH2
Cat. No.

TH2-NBG
Cat. No.

TH3
Cat. No.

TH3-NBG
Cat. No.

TH4
Cat. No.

TH4-NBG
Cat. No.

1. Pawl Pin

TH000-1

TH00-1

TH1-1

TH2-1

TH2-1

TH3-1

TH3-1

TH4-1

TH4-1

2. Spindle

TH000-2

TH00-2

TH1-2

TH2-2

TH2-2

TH3-2

TH3-2

TH4-2

TH4-2NBG

3. Set Screw

TH000-3

TT00-13

TT1-6

TT2-13

TT2-13

TT2-13

NR3-3

TH4-3

NR4-3

4. Pawl

TH000-4

TH00-4

TH1-4

TH2-4

TH2-4

TH3-4

TH3-4

TH4-4

TH4-4

5. Pawl Spring

TH000-5

TH1-5

TH1-5

TH1-5

TH1-5

TH3-5

TH3-5

TH3-5

TH3-5

6. Clutch Spring

TH000-6

TH00-6

TH1-6

TH2-6

TH2-6

TH3-6

TH3-6

TH4-6

TH4-6

7. Clutch Washer

TH000-7

TH00-7

TH1-7

TH2-7

TH2-7

TH3-7

TH3-7

TH4-7

TH4-7

8. Clutch Nut

TH000-8

TH00-8

TH1-8

TH2-8

--

TH3-8

--

TH4-8

--

8-S Short Clutch Nut

TH000-8S

TH00-8S

TH1-8S

TH2-8S

TH2-8S

TH3-8S

TH3-8S

TH4-8S

TH4-8S

9. Clutch Ring

TH000-9

TH00-9

TH1-9

TH2-9

TH2-9

TH3-9

TH3-9

TH4-9

TH4-9

10. Body

TH000-10

TH00-10

TH1-10

TH2-10

TH2-10NBG

TH3-10

TH3-10NBG

TH4-10

TH4-10NBG

11. Cover Plate
(Old Style)

TH000-11

TH00-11

TH1-11

TH2-11

TH2-11

TH3-11

TH3-11NBG

TH4-11

TH4-11

11C. Cup Style

TH000-11C

TH00-11C

TH1-11C

TH2-11C

TH2-11C

TH3-11C

TH3-11NBG

TH4-11C

TH4-11C

12. Cover Plate
Screw

TH000-12

TH00-12

TH00-12

TH00-12

TH00-12

TH00-12

TH00-12

TH00-12

TH00-12

13. Shank Spring

TH000-13

TH00-13

TH1-13

TH2-13

TH2-13

TH3-13

TH3-13

TH4-13

TH4-13NBG

13-2 Retainer

--

TH00-13-2

--

--

--

--

--

--

--

14. Spindle Nut

TH000-14

TH00-14

TH1-14

TH2-14

TH2-14

TH2-14

TH2-14

TH4-14

TH4-14NBG