PITCHMASTER

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SPI

PITCHMASTER

  • Precision machined and chrome plated caliper and micrometer attachments with precision ground inserts for accurate measurements (sold separately)

  • Caliper attachments are designed for use with 6" dial or electronic calipers with max. jaw thickness of 0.140"

  • The I.D. Caliper attachment set includes 4 pairs of I.D. inserts to measure threads from 42 to 6.5 TPI with a minimum 5⁄8" minor internal diameter, and all 60° metric internal threads with a minimum 16 mm minor diameter and a pitch from 0,6 mm to 4,0 mm.

  • The O.D. Caliper attachment set includes 4 pairs of O.D. inserts for measuring 60° external threads from 42 to 6.5 TPI and 0,6 mm to 4,0 mm pitch.

  • The O.D. Micrometer attachment set includes 4 pairs of O.D. inserts to measure 60° external threads from 42 to 6.5 TPI, and 60° external metric threads from 0,6 mm to 4,0 mm pitch with a Micrometer with 1/4" dia. spindle

  • Ideal for quick checking threads in the machine shop.

  • Furnished with instructions.


PITCHMASTER Sets:

Part No. Description
31-470-8 I.D. and O.D. Attachments & Inserts for Calipers
31-471-6 I.D. Attachment & Inserts for Calipers
31-472-4 O.D. Attachment & Inserts for Calipers
31-473-2 O.D. Attachments & Inserts for Micrometers



O.D. Insert Pairs:

Part No. Description
31-474-0 42 - 25 TPI / 0,6 - 1,0 mm Pitch
31-475-7 25 - 17 TPI / 1,0 - 1,5 mm Pitch
31-476-5 17 - 10 TPI / 1,5 - 2,5 mm Pitch
31-477-3 10 - 6,5TPI / 2,5 - 4,0 mm Pitch



I.D. Insert Pairs:

Part No. Description
31-478-1 42 - 25 TPI / 0,6 - 1,0 mm Pitch
31-479-9 25 - 17 TPI / 1,0 - 1,5 mm Pitch
31-481-5 17 - 10 TPI / 1,5 - 2,5 mm Pitch
31-482-3 10 - 6,5TPI / 2,5 - 4,0 mm Pitch



Attachments Only (in Pairs):

Part No. Description
31-483-1 Micrometer Attachment for 1/4" Anvil
31-484-9 Micrometer Attachment for 0.257" Anvil