Document And Entity Information - shares	3 Months Ended
	Sep. 25, 2015	Oct. 26, 2015
Entity Registrant Name	TWIN DISC INC
Entity Central Index Key	0000100378
Trading Symbol	twin
Current Fiscal Year End Date	--06-30
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		11,351,924
Document Type	10-Q
Document Period End Date	Sep. 25, 2015
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q1
Amendment Flag	false